2009 BMW X6 – Click above for high-res image gallery
BMW has officially announced changes for its 2011 BMW X6, and the big news is that the German automaker will swap out its twin-turbo N54 inline-six in this sport utility for the new twin-scroll single turbo N55 mill, just like it did in the new 5 Series. The move continues BMW's drive toward simplifying its engine options while at the same time providing X6 owners with stronger acceleration and increased efficiency. BMW claims the N55 matches the twin-scroll N54's power numbers while also cutting weight from the engine bay. And since this bubbly crossover weighs in at a rotund 4,900 pounds, we're thinking every pound lost is a good thing.

The twin-scroll inline-six will produce 306 horsepower and 295 pound-feet of torque in the X6, six more ponies and five fewer lb-ft than the outgoing twin turbo model. Both the X6 35i and X6 50i will also receive ZF's eight speed automatic transmission for the 2011 model year. The eight forward gears will even further improve efficiency while also deliver smoother shifts.

[Source: BMW]

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