http://www.carsession.com/car-news/m...nne-turbo.html
Awesome comparison test done by a british website...
X6 50i vs Cayenne Turbo vs ML63 vs Q7 V12
All were driven around a small and fairly technical race track...
Check out the times at the end of the second video
1. Cayenne Turbo 1:47.5
2. X6 -- 1:47.6
3. ML63 AMG -- 1:48.3
4. Q7 V12 -- 1:50.7
Pretty impressive considering the price of the "standard" X6 is considerably less than all of these options. Makes me think what an X6M would have done to the competition...