The X5 M shares its engine with the X6 M, a 4.4l unit that develops 555 horsepower and 680 Nm, making it able to reach 60 mph (100 km/hour) in 4.7 seconds. The top speed of the X5 M and X6 M is 250 km/hour (155 mph).
The new V8 Twin Scroll turbocharged engine makes use of a common exhaust manifold joining both rows of cylinders, with the turbochargers, as well as with the catalytic converters placed in the V-section. This provides less turbo lag and a swifter response. The engine fitted on the two new Ms is controlled via a six speed sports automatic gearbox with Steptronic. Gear shifting in done by using the electronic gear select lever or by the shift paddles located on the steering wheel.
The vehicles are rated as having a combined fuel consumption rate of 13.9l/100 km (17 mpg) – urban 19.3 l/100 km (12 mpg) and highway 10.8 l/100 km (22 mpg). And if this doesn’t scare tree huggers away, CO2 emission will, as they are rated at 325 g/km.
For more addition information, you can study the available specs on the attached PDF below . As we can see, the two new M SUV’s are largely identical from the performance levels stand point, starting from the engine and ending with the transmission. The only differences are, obviously, due to the two body styles of the Xs (for instance, luggage capacity is smaller for the X6 M).
Update on April 24: BMW X5m and X6M pricing for the US released.