HISTORY : JAPAN FAST CARS
MAZDA
RX-7
The
Mazda RX-7 was one of the few classic sports cars to come from Japan. Known for
its sleek styling, unique rotary engine and affordable price, the two-door
coupe was an instant hit from the moment it was introduced for the 1978 model
year.
Mazda's
devotion to the Wankel rotary engine is one of the more well-known quirks of
the auto industry. Although it is less fuel-efficient than conventional piston
engines, the rotary engine has the benefit of being compact and lightweight.
These qualities, along with the car's well-tuned chassis and rear-wheel-drive
layout, have made the Mazda RX-7 one of the best-handling affordable sports
cars ever made.
Through
three generations, Mazda made sure that the RX-7 stayed on the cutting edge of
design and performance, completely overhauling the car for each model change.
Unfortunately, Mazda probably went too far with the final RX-7. Although it was
beautiful to look at, the third generation's overall no-compromise performance
concept was too extreme, and the car's high price turned off many potential
buyers. Sagging sales forced Mazda to stop importing the RX-7 to the North
American market just three years into its product cycle.
Though
Mazda is currently producing a rotary-powered successor, the four-seat RX-8,
many enthusiasts are still hoping the company will bring out an all-new RX-7.
Though rumors have floated about, no official plans have been announced.
First
generation (FB)
Series
1 (1978–1980) is commonly referred to as the "SA22C" from the first
alphanumerics of the vehicle identification number. In Japan it was introduced
in March 1978, replacing the Savanna RX-3, and joined Mazda's only other
remaining rotary engine powered products, called the Mazda Cosmo which was a
two-door luxury coupe, and the Mazda Luce luxury sedan.
The
lead designer at Mazda was Matasaburo Maeda, whose son Ikuo would go on to design
the Mazda2 and Mazda RX-8. The transition of the Savana to a sports car
appearance reflected products from other Japanese manufacturers. The advantage
the RX-7 had was its minimal size and weight, and the compact rotary engine
installed behind the front axle, which helped balance the front to rear weight
distribution, and provide a low center of gravity.
In
Japan, sales were enhanced by the fact that the RX-7 complied with Japanese
Government dimension regulations, and Japanese buyers were not liable for
yearly taxes for driving a larger car. The rotary engine had financial
advantages to Japanese consumers in that the engine displacement remained below
1.5 litres, a significant determination when paying the Japanese annual road
tax which kept the obligation affordable to most buyers, while having more
power than the traditional inline engines.
In
May 1980, Mazda released a limited production run of special North American
models known as the Leathersport Models. This package was essentially an
uprated GS model with added LS badges on each B-pillar, special striping, and
LS-only gold anodized wheels (with polished outer face and wheel rim). All LS
editions came equipped with special LS-only full brown leather upholstery,
leather wrapped steering wheel, leather wrapped shift knob, removable sunroof,
LS-specific four-speaker AM/FM stereo radio with power antenna (though listed
as a six speaker stereo, as the two rear dual voice coil speakers were counted
as four speakers in total), remote power door side mirrors, and other standard
GS equipment. Two primary options were also available; a three-speed JATCO
3N71B automatic transmission and air conditioning. Other GS options such as
cassette tape deck, splash guards, padded center console arm rest and others
could be added by the dealer. The LS model was only ever available in three
different exterior colors: Aurora White, Brilliant Black, and Solar Gold. No
official production records are known to exist or to have been released. This
series of RX-7 had exposed steel bumpers and a high-mounted indentation-located
license plate, called by Werner Buhrer of Road & Track magazine a
"Baroque depression."
The
Series 2 (1981–1983) had integrated plastic-covered bumpers, wide black rubber
body side moldings, wraparound taillights and updated engine control
components. While marginally longer overall, the new model was 135 lb (61 kg)
lighter in federalized trim.[3] The four-speed manual option was dropped for
1981 as well, while the gas tank grew larger and the dashboard was redesigned,
including a shorter gear stick mounted closer to the driver. In 1983, the 130
mph speedometer returned for the RX-7. The GSL package provided optional
four-wheel disc brakes, front ventilated (Australian model) and clutch-type
rear limited slip differential (LSD). Known as the "FB" in North
America after the US Department of Transportation mandated 17 digit Vehicle
Identification Number changeover. For various other markets worldwide, the
1981–1985 RX-7 retained the 'SA22C' VIN prefix. In the UK, the 1978–1980 series
1 cars carried the SA code on the vehicle VIN but all later cars (1981–1983
series 2 & 1984–1985 series 3) carried the FB code and these first
generation RX7's are known as the "FB". The license-plate surround
looks much like Buhrer's "Styling Impressions”.
In
Europe, the FB was mainly noticed for having received a power increase from the
105 PS (77 kW) of the SA22; the 1981 RX-7 now had 115 PS (85 kW) on tap.
European market cars also received four-wheel disc brakes as standard.
The
Series 3 (1984–1985) featured an updated lower front fascia. North American
models received a different instrument cluster. GSL package was continued into
this series, but Mazda introduced the GSL-SE sub-model. The GSL-SE had a
fuel-injected 1.3 L 13B RE-EGI engine producing 135 hp (101 kW) and 135 lb·ft
(183 N·m). GSL-SEs had much the same options as the GSL (clutch-type rear LSD
and rear disc brakes), but the brake rotors were larger, allowing Mazda to use
the more common lug nuts (versus bolts), and a new bolt pattern of 4x114.3
(4x4.5"). Also, they had upgraded suspension with stiffer springs and
shocks. The external oil cooler was reintroduced, after being dropped in the
1983 model-year for the controversial "beehive" water-oil heat
exchanger.
The
1984 RX-7 GSL has an estimated 29 highway miles per gallon (8.11 litres per 100
km) /19 estimated city miles per gallon (12.37 l/100 km). According to Mazda,
its rotary engine, licensed by NSU-Wankel allowed the RX-7 GSL to accelerate
from 0 to 50 (80 km/h) in 6.3 seconds. Kelley Blue Book, in its
January–February 1984 issue, noted that a 1981 RX-7 GSL retained 93.4% of its
original sticker price.
In
1985 Mazda released the RX7 Finale in Australia. This was the last of the
series and brought out in limited numbers. The Finale featured power options
and a brass plaque mentioning the number the car was as well as "Last of a
legend" on the plaque. The finale had special stickers and a blacked out
section between the window & rear hatch.
The
handling and acceleration of the car were noted to be of a high caliber for its
day. This generation RX-7 had "live axle" 4-link rear suspension with
Watt's linkage, a 50/50 weight ratio, and weighed under 2,500 lb (1,100 kg). It
was the lightest generation of RX-7 ever produced. 12A-powered models
accelerated from 0–60 mph in 9.2 s, and turned 0.779 g (7.64 m/s²) laterally on
a skidpad. The 12A engine produced 100 hp (75 kW) at 6,000 rpm, allowing the
car to reach speeds of over 120 miles per hour (190 km/h). Because of the
smoothness inherent in the Wankel rotary engine, little vibration or harshness
was experienced at high engine speeds, so a buzzer was fitted to the tachometer
to warn the driver when the 7,000 rpm redline was approaching.
The
12A engine has a long thin shaped combustion chamber, having a large surface
area in relation to its volume. Therefore, combustion is cool, giving few
oxides of nitrogen. However, the combustion is also incomplete, so there are
large amounts of partly burned hydrocarbons and carbon monoxide. The exhaust is
hot enough for combustion of these to continue into the exhaust. An engine
driven pump supplies air into the exhaust to complete the burn of these
chemicals. This is done in the "thermal reactor" chamber where the
exhaust manifold would normally be on a conventional engine. Under certain conditions
the pump injects air into the thermal reactor and at other times air is pumped
through injectors into the exhaust ports. This fresh air is needed for more
efficient and cleaner burning of the air/fuel mixture.
Options
and models varied from country to country. The gauge layout and interior
styling in the Series 3 was only changed for North American versions.
Additionally, North America was the only market to have offered the first
generation RX-7 with the fuel-injected 13B, model GSL-SE. Sales of the first generation
RX-7 were strong, with a total of 474,565 first generation cars produced;
377,878 (nearly eighty percent) were sold in the United States alone. In 2004,
Sports Car International named this car seventh on their list of Top Sports
Cars of the 1970s. In 1983, the RX-7 would appear on Car and Driver magazine's
Ten Best list for the first time in 20 years.
Savanna
RX-7 Turbo
Following
the introduction of the first turbocharged rotary engine in the Luce/Cosmo, a
similar, also fuel injected and non-intercooled 12A turbo engine was made
available for the top-end model of the series 3 RX-7 in Japan. It was introduced
in September 1983. Power is 165 PS (121 kW) JIS at 6,500 rpm. While the peak
power figures were only somewhat higher than those of the engine used in the
Luce/Cosmo, the new "Impact Turbo" was developed specifically to deal
with the different exhaust gas characteristics of a rotary engine. Both rotor
vanes of the turbine were remodelled and made smaller, and the turbine had a
twenty percent higher speed than a turbo intended for a conventional engine.
The Savanna Turbo was short-lived, as the next generation RX-7 was just around
the corner.
Second
generation (FC)
The
Series 4 (1985–1988) was available with a naturally aspirated, fuel-injected
13B-VDEI producing 146 hp (108 kW). An optional turbocharged model, (1985–1988)
known as the Turbo II in the American market, had 182 hp / 185 ps (135 kW). The
Series 5 (1989–1992) featured updated styling and better engine management, as
well as lighter rotors and a higher compression ratio, 9.7:1 for the naturally
aspirated model, and 9.0:1 for the turbo model. The naturally aspirated Series
5 FC made 160 hp (119 kW), while the Series 5 Turbo made 200 hp / 205 ps (147
kW).
The
rotary engine had financial advantages to Japanese consumers in that the engine
displacement remained below 1.5 litres, a significant determination when paying
the Japanese annual road tax which kept the obligation affordable to most
buyers, while having more power than the traditional inline engines. The RX-7
in this regard to Japanese owners offered comparable performance to other
Japanese performance coupes, while being of lighter weight, with a balanced
chassis, and lively performance, without the extra expense of the road tax
obligation.
The
second generation RX-7 ("FC", VIN begins JM1FC3 or JMZFC1), still
known as the Mazda Savanna RX-7 in Japan, featured a complete restyling
reminiscent of the Porsche 924. Mazda's stylists, led by Chief Project Engineer
Akio Uchiyama, focused on the Porsche 924 for their inspiration in designing
the FC because the new car was being styled primarily for the American market,
where the majority of first generation RX-7's had been sold.
This
strategy was chosen after Uchiyama and others on the design team spent time in
the United States studying owners of earlier RX-7's and other sports cars
popular in the American market. The Porsche 944 was selling particularly well
at the time and provided clues as to what sports-car enthusiasts might find
compelling in future RX-7 styling and equipment.
While
the SA22/FB was a purer sports car, the FC tended toward the softer sport-tourer
trends of its day, sharing some similarities with the HB series Cosmo. Handling
was much improved, with less of the oversteer tendencies of the FB. The rear
end design was vastly improved from the FB's live rear axle to a more modern,
Independent Rear Suspension (rear axle). Steering was more precise, with rack
and pinion steering replacing the old recirculating ball steering of the FB.
Disc brakes also became standard, with some models (S4: Sport, GXL, GTU, Turbo
II, Convertible; S5: GXL, GTUs, Turbo, Convertible) offering four-piston front
brakes. The rear seats were optional in some models of the FC RX-7, but are not
commonly found in the American Market.
Mazda also introduced Dynamic Tracking
Suspension System (DTSS) in the 2nd generation RX-7. The revised independent
rear suspension incorporated special toe control hubs which were capable of
introducing a limited degree of passive rear steering under cornering loads.
The DTSS worked by allowing a slight amount of toe-out under normal driving
conditions but induced slight toe-in under heavier cornering loads at around
0.5 G's or more; toe-out in the rear allows for a more responsive rotation of
the rear, but toe-in allowed for a more stable rear under heavier cornering.
Mazda also introduced Auto Adjusting Suspension (AAS) in the 2nd generation
RX-7. The system changed damping characteristics according to the road and
driving conditions. The system compensated for camber changes and provided
anti-dive and anti-squat effects. The Turbo 2 uses a turbo charger with a twin
scroll design. The smaller primary chamber is engineered to cancel the turbo
lag at low engine speeds. At higher revolutions the secondary chamber is
opened, pumping out 33% more power than the naturally aspirated counterpart.
The Turbo 2 also has an air-to-air intercooler which has a dedicated intake on
the hood. The intake is slightly offset toward the left side of the hood.
Though
about 800 lb (363 kg) heavier and more isolated than its predecessor, the FC
continued to win accolades from the press. The FC RX-7 was Motor Trend's Import
Car of the Year for 1986, and the Turbo II was on Car and Driver magazine's Ten
Best list for a second time in 1987.
In
the Japanese market, only the turbo engine was available; the naturally
aspirated version was allowed only as an export. This can be attributed to
insurance companies penalizing turbo cars (thus restricting potential sales).
This emphasis on containing horsepower and placating insurance companies to
make RX-7's more affordable seems ironic in retrospect. Shortly after the
discontinuance of the second generation RX-7's in 1992, an outright horsepower
"arms race" broke out between sports car manufacturers, with higher
and higher levels of power required to meet buyer demands. This rising
horsepower phenomena arose from the US CAFE standards remaining stable while
engine technologies marched forward rapidly.
Mazda
sold 86,000 RX-7's in the US alone in 1986, its first model year, with sales
peaking in 1988.
Australian
Motors Mazda released a limited run of 250 'Sports' model Series 4 RX-7's; each
with no power steering, power windows or rear wiper as an attempt to reduce the
weight of the car. In Japan, there was a special limited release of the FC
called Infini with only 600 made for each year. Some special noted features for
all Infini series are: infini logo on the back, upgraded suspension, upgraded
ECU, higher horsepower, lightened weight, 15-inch BBS aluminum alloy wheels,
Infini logo steering wheel, aero bumper kits, bronze colored window glass,
floor bar on the passenger side, aluminum bonnet with scoop, flare and holder.
The car was thought as the pinnacle of the RX-7 series (until the FD came out).
The Infini IV came with other special items such as black bucket seats, 16-inch
BBS wheels, Knee pads, and all the other items mentioned before. There are
differing years for the Infini, which noted the series. Series I was introduced
in 1987, Series II was introduced in 1988, Series III was introduced in 1990,
and Series IV was introduced in 1991. Series I and II came in White or Black,
Series III came in Forest Green only, and Series IV came in Forest Green or
Noble Green. There are only minor differences between the series, the biggest
change which was from the Series II being an S4 (1985–1988) and the Series III
and IV being an S5 (1989–1991).
Mazda
RX-7 Convertible (FC)
Mazda
introduced a convertible version of the RX-7 in 1988 with a naturally aspirated
engine — introduced to the US market with ads featuring actor James Garner, at
the time featured in many Mazda television advertisements.
The
convertible featured a removable rigid section over the passengers and a
folding textile rear section with heatable rear glass window. Power operated,
lowering the top required unlatching two header catches, power lowering the
top, exiting the car (or reaching over to the right side latch), and folding
down the rigid section manually. Mazda introduced with the convertible the
first[citation needed] integral windblocker, a rigid panel that folded up from
behind the passenger seats to block unwanted drafts from reaching the
passengers — thereby extending the driving season for the car in open mode. The
convertible also featured optional headrest mounted audio speakers and a
folding leather snap-fastened tonneau cover. The convertible assembly was
precisely engineered and manufactured, and dropped into the ready body assembly
as a complete unit — a first in convertible production.
Several
car magazines at the time lauded the convertible. Production ceasing in 1991
after Mazda marketed a limited run of 500 example for 1992 for the domestic
market only. In Japan, the United Kingdom, and other regions outside the US, a
turbocharged version of the convertible was available.
10th
Anniversary RX-7
Mazda
introduced the 10th Anniversary RX-7 in 1988 as a limited production run based
on the RX-7 Turbo II. Production was limited to 1,500 models. The 10th
Anniversary RX-7 features a Crystal White (paint code UC) monochromatic paint
scheme with matching white body side mouldings, taillight housings, mirrors and
16-inch alloy 7-spoke wheels. There were two "series" of 10th
Anniversary models, with essentially a VIN-split running production change
between the two. The most notable difference between the series can be found on
the exterior- the earlier "Series I" cars had a black
"Mazda" logo decal on the front bumper cover, whereas most if not all
"Series II" cars did not have the decal. Series II cars also received
the lower seat cushion height/tilt feature that Series I cars lacked. Another
distinctive exterior feature is the bright gold rotor-shaped 10th Anniversary
Edition badge on the front fenders (yellow-gold on the Series II cars). A
distinctive 10th Anniversary package feature is the all black leather interior
(code D7), which included not just the seats, but the door panel inserts as
well and a leather-wrapped MOMO steering wheel (with 10th Anniversary Edition
embossed horn button) and MOMO leather shift knob with integrated boot. All
exterior glass is bronze tinted (specific in North America to only the 10th
Anniversary), and the windshield was equipped with the embedded secondary
antenna also found on some other select models with the upgraded stereo
packages. Other 10th Anniversary Edition specific items were headlight washers
(the only RX-7 in the US market that got this feature), glass breakage
detectors added to the factory alarm system, 10th Anniversary Edition logoed floormats,
10th Anniversary Edition embroidered front hood protector and accompanying
front end mask (or "bra"), and an aluminum under pan.
GTUs
(1989-1990)
In
1989, with the introduction of a face-lifted FC RX-7, and to commemorate the
RX-7's IMSA domination, Mazda introduced a limited model labeled the GTUs.
Starting with the lightweight base model GTU, which came with manual windows,
no rear wiper, the sunroof and A/C was dealer optioned, the GTUs added items
found on the Turbo model such as four piston front brakes, rear ventilated
brake rotors, vehicle speed sensing power steering, 1 piece front chin spoiler,
cloth covered Turbo model seats, leather wrapped steering wheel, 16 inch
wheels, 205/55VR tires, and a GTUs-only 4.300 Viscous-type limited slip differential
(all other FC LSD's where 4.100). This allowed quicker acceleration from the
non-turbo powered 13B. Mazda built 1100 GTUs's in 1989, with the last 100
re-stamped as 1990 models.
Third
generation (FD)
The
third generation of the RX-7, FD (with FD3S for Japan and JM1FD for the USA
VIN), featured an updated body design. The 13B-REW was the first-ever
mass-produced sequential twin-turbocharger system to export from Japan,
boosting power to 255 PS (188 kW; 252 hp) in 1993 and finally 280 PS (206 kW;
276 hp) by the time production ended in Japan in 2002.
In
Japan, sales were affected by the fact that this series RX-7 no longer complied
with Japanese Government dimension regulations, and Japanese buyers were liable
for yearly taxes for driving a wider car compared to previous generations. As
the RX-7 was now considered an upper-level luxury sportscar due to the
increased width dimensions, Mazda offered two smaller sports cars, the Eunos
Roadster, and the Eunos Presso hatchback.
The
sequential twin turbocharged system, introduced on this series in 1992, was a
very complex piece of engineering, developed with the aid of Hitachi and
previously used on the exclusive to Japan Cosmo series (JC Cosmo=90–95). The
system was composed of two turbochargers, one to provide boost at low RPM. The
second unit was on standby until the upper half of the rpm range during full
throttle acceleration. The first turbocharger provided 10 psi (0.7 bar) of
boost from 1800 rpm, and the second turbocharger was activated at 4000 rpm and
also provided 10 psi (0.7 bar). The changeover process occurred at 4500 rpm, 8
psi (0.6 bar), was smooth, and provided linear acceleration and a wide torque
curve throughout the entire rev range.
Handling
in the FD was regarded as world-class, and it is still regarded as being one of
the finest handling and the best balanced cars of all time. The
continued use of the front-midship engine and drivetrain layout, combined with
a 50:50 front-rear weight distribution ratio and low center of gravity, made
the FD a very competent car at the limits.
Australia
had a special high-performance version of the RX-7 in 1995, named the RX-7 SP.
This model was developed to achieve homologation for racing in the Australian
GT Production Car Series and the Eastern Creek 12 Hour production car race. An
initial run of 25 originals' were made, and later an extra 10 were built by
Mazda due to demand. The RX-7 SP produced 204 kW (274 hp) and 357 N·m (263
lb·ft) of torque, compared to the 176 kW (236 hp) and 294 N·m (217 lb·ft) of
the standard version. Other changes included a race-developed carbon fibre nose
cone and rear spoiler, a carbon fibre 120 L fuel tank (as opposed to the 76 L
tank in the standard car), a 4.3:1-ratio rear differential, 17-inch wheels,
larger brake rotors and calipers. An improved intercooler, exhaust, and
modified ECU were also included. Weight was reduced significantly with the aid
of further carbon fibre usage including lightweight vented bonnet and Recaro
seats to reduce weight to 1218 kg (from 1250 kg). It was a serious road-going
race car that matched their rival Porsche 911 RS CS for the final year Mazda
officially entered. The formula paid off when the RX-7 SP won the 1995 Eastern
Creek 12 Hour, giving Mazda the winning 12hr trophy for a fourth straight year.
The winning car also gained a podium finish at the international tarmac rally
Targa Tasmania months later. A later special version, the Bathurst R, was
released in 2001 to commemorate this, in Japan only.
In
the United Kingdom, for 1992, customers were offered only one version of the
FD, which was based on a combination of the US touring and the base model. For
the following year, in a bid to speed up sales, Mazda reduced the price of the
RX-7 to £ 25,000, down from £ 32,000, and refunded the difference to those who
bought the car before that was announced. The FD continued to be imported to
the UK until 1996. In 1998, for a car that had suffered from slow sales when it
was officially sold, with a surge of interest and the benefit of a newly
introduced SVA scheme, the FD would become so popular that there were more
parallel and grey imported models brought into the country than Mazda UK had
ever imported.
Series
6 (1991–1995) was exported throughout the world and had the highest sales. In
Japan, Mazda sold the RX-7 through its É›̃fini brand as the É›̃fini
RX-7. Models in Japan included the Type R, the lightweight sports model Type
RZ, the Type RB, the A-spec and the Touring X, which came with a four-speed
automatic transmission. Only the 1993–1995 model years were sold in the U.S.
and Canada. Series 6 came with 255 PS (188 kW; 252 hp) and 294 Nm (217 lb·ft).
In
1993, three North American models were offered; the "base", the
touring, and the R models. The touring FD included a sunroof, fog lights,
leather seats, a rear window wiper and a Bose Acoustic Wave system. The R (R1
in 1993 and R2 in 1994–95) models featured stiffer suspensions, an additional
engine oil cooler, an aerodynamics package, purple-hued microfiber seats, and
Z-rated tires. In 1994, the interior received a small update to include a
passenger air bag, and a PEG (performance equipment group) model was offered.
This model featured leather seats and a sunroof. It did not include the fog lights
or Bose stereo of the touring package. In 1995, the touring package was
replaced by the PEP (popular equipment package). The PEP package contained
leather seats, sunroof and fog lights, but didn't have the Bose Stereo nor the
rear window wiper.
In
Europe, only 1152 examples of this model were sold through the official Mazda
network. Only one spec. was available and it included twin oil-coolers,
electric sunroof, cruise control and the rear storage bins in place of the back
seats. Germany top the sales with 446 cars, while UK is second at 210 and
Greece third with 168. The european models also received the 1994 interior
facelift, with a passenger air bag.
Series
7 (1996–1998) included minor changes to the car. Updates included a simplified
vacuum routing manifold and a 16-bit ECU which combined with an improved intake
system netted an extra 10 PS (7 kW). This additional horsepower was only
available on manual transmission cars as the increase in power was only seen
above 7000rpm, which was the redline for automatic transmission equipped cars.
The rear spoiler and tail lights were also redesigned. The Type RZ model was
now equipped with larger brake rotors as well as 17 inch BBS wheels. In Japan,
the Series 7 RX-7 was marketed under the Mazda and É›̃fini
brand name. The Series 7 was also sold in Australia, New Zealand and the UK.
Series 7 RX-7s were produced only in right-hand-drive configuration.
Series
8 (January 1999– August 2002) was the final series, and was only available in
the Japanese market. More efficient turbochargers were available on certain
models, while improved intercooling and radiator cooling was made possible by a
redesigned front fascia with larger openings. The seats, steering wheel, and
instrument cluster were all changed. The rear spoiler was modified and gained
adjustability on certain models. Three horsepower levels are available: 255 ps
for automatic transmission equipped cars, 265 ps for the Type RB, and 280 ps
available on the top-of-the-line sporting models. The high-end "Type RS"
came equipped with Bilstein suspension and 17-inch wheels as standard
equipment, and reduced weight to 1,280 kg (2,822 lb). Power was increased with
the addition of a less restrictive muffler and more efficient turbochargers
which featured abradable compressor seals, 280 PS (206 kW; 276 hp) with 313.8
Nm (231 lb·ft) of torque as per the maximum Japanese limit. The Type RS had a
brake upgrade by increasing rotor diameter front and rear to 314 mm (12.4 in)
and front rotor thickness from 22 mm (0.9 in) to 32 mm (1.3 in). The Type RS
version also sported a 4.30 ratio differential, providing a significant
reduction in its 0–100 km/hr time. The gearbox was also modified, 5th gear was
made longer to reduce cruising rpm and improve fuel efficiency. The very limited
edition Type RZ version included all the features of the Type RS, but at a
lighter weight (at 1270 kg). It also featured custom gun-metal colored BBS
wheels and a custom red racing themed interior. An improved ABS system worked
by braking differently on each wheel, allowing the car better turning during
braking. The effective result made for safer driving for the average buyer.
Easily the most collectible of all the RX-7s were the last 1,504 run-out
specials. Dubbed the "Spirit R", they combined all the
"extra" features Mazda had used on previous limited-run specials with
new exclusive features like cross-drilled brake rotors. Sticker prices when new
were 3,998,000 yen for Type-A and B and 3,398,000 yen for Type-C. Mazda's press
release said "The Type-A Spirit R model is the ultimate RX-7, boasting the
most outstanding driving performance in its history."
There
are three models of "Spirit R": the "Type A", "Type
B", and "Type C". The "Type A" is a two-seater with a
5-speed manual transmission. It features lightweight red trim Recaro front
seats as seen in the earlier RZ models. The "Type B" has a 2+2 seat
configuration and also sports a five-speed manual transmission. The "Type
C" is also a 2+2, but has a four-speed automatic transmission. Of the 1504
Spirit R's made, over 1000 were Type A's. An exclusive Spirit R paint color,
Titanium Grey, adorned over 700 of the 1500 cars sold.