Audi Q7 V12 TDI versus BMW M5
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Audi Q7 V12 TDI versus BMW M5
![](http://www.automk.com/media/2009/04/2009042600304920.jpg.thumb.jpg)
Autocar decided to find out which was faster among two unlikely bedfellows sharing one common trait: 500 horsepower. In one lane you've got the BMW M5, with ten petrol-powered cylinders. In the adjacent lane there's the Q7 V12 TDI, with twelve oil-burning cylinders. The M5 is much lighter. The Q7 has Quattro. And being England, of course it's wet. Follow the jump to see who won and by how much.