VIDEO: Audi Q7 V12 TDI versus BMW M5

Click above to watch the Audi Q7 V12 TDI take on the BMW M5

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.

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