From Autoweek:
The BMW X5 shares much of its chassis with the X6, so there's no reason why the X6 shouldn't share its 4.4-liter, twin-turbocharged V8 with the X5. In the X6, this engine is rated at 400 hp.
This prototype was spied undergoing hot-weather testing in the southwest United States. Note how BMW engineers used black mesh on the front bumper to conceal some extra cooling ducts.
We expect the twin-turbo equipped X5 to make its formal debut later this year, likely at either the Paris and Los Angeles auto shows.
