BMW has just unveiled the new X5 xDrive40d
and X6 xDrive40d models that come outfitted with a straight six-cylinder diesel
engine and mild-hybrid technology. The diesel powertrain used by both models
displaces 3.0-liters and includes a two-stage turbocharging system and Common
Rail piezo direct fuel injection. All up, the engine delivers 335 HP at 4,400 rpm and 700 Nm of torque between 1,750 rpm and 2,250 rpm.
Both the X5 xDrive40d and X6 xDrive40d
couple this engine with an eight-speed Steptronic transmission and intelligent
BMW xDrive four-wheel drive technology. Assisting the 3.0-liter straight-six
diesel is a 48-volt starter-generator that provides an extra 11 HP.
Both models can sprint to 100 km/h in 5.5 seconds.
The starter generator gets its power from
the SUVs‘ 48-volt battery that also supplies all-electric driving functions via
the 12-volt vehicle electrical system. The battery is charged through the
recuperation of energy during acceleration and braking. BMW says the starter
generator also provides spontaneous and low-vibration starting and re-starting
of the engine when the Auto Start/Stop or “sailing” functions are enabled.
The “sailing” function (also known as
coasting) not only disconnects the engine but also switches it off entirely. To
make use of this function more frequently, it is now no longer only available
in Eco-Pro mode, but also in the Comfort mode. The BMW X5 xDrive40d has a
claimed average fuel consumption of 36-39 mpg (5.9-6.4 l/100 km) and combined
CO2 emissions of 154-167 g/km. The X6 xDrive40d returns 38-40 mpg (5.8-6.2
l/100 km) and combined CO2 emissions of 153-164 g/km. BMW hasn’t said when the
vehicles will hit the market nor how much they will set customers back.
