Strict worldwide standards for emissions and towering production costs in Germany are the reasons for Bmw's decision to change from high-revving, naturally aspirated powerplants in its M high-performance vehicles to turbocharged direct-injection powerplants, starting sooner as 2009.
The shift, which could totally change the traits of Bmw M versions, puts question marks over the immediate prospect of the M3's 4.0-liter V8 and the M5's 5.0-liter V10. According to high-ranking Bmw sources, both powerplants provide a way for forced-induction engines in the future.
The X6 xDrive M is the first M vehicle to make the move to the new turbo engines, which will confront the Mercedes-Benz ML63 AMG and the Porsche Cayenne GTS.
Scheduled to display next June, the X6 xDrive M will be the primary model to utilize Bmw M's new twin-turbocharged V8 engine. This engine, which is going to be available late in 2010, is also allocated for the next-generation M5.
Patterned after the 4.4-liter 90-degree V8 engine of the typical X6 xDrive 5.0i, the latest twin-turbo motor is asserted to match the latest M5's naturally aspirated 5.0-liter V10 engine for energy at 500 hp, while providing torque level as much as 516 lb-ft.
This is sufficient to give the M-powered X6 with an acceleration rate of 0 to 60 mph (96 km/h) in under 5 seconds and a 155 mph (250 km/h) ceiling speed.
AutoWeek was informed by a senior Bmw M official: "In terms of overall performance, the new engine doesn't give anything away to the powerplant we run now, but it delivers much better consumption and lower emissions."