Motorvision, a German publication, tests the actual capabilities of the BMW X6 M powered by a 4.4 liter V8 engine delivering 555 horsepower at 6,000 rpm and 500 lb-ft of torque from 1,500 to 5,650 rpm. They used a vehicle with the M Drivers package which takes off the electronic speed delimiter allowing for speeds up to 305 km/h.
[youtube]http://www.youtube.com/watch?v=FUr64fOCt7U[/youtube]