Tiff and Jason are going head to head to see which car is better, the Porsche Cayenne Turbo or the Audi Q7 V12 TDI. For more fantastic car reviews, shoot-outs .\r
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Tiff decides to put the Porsche Cayenne Turbo to the test against Mercedes ML63 AMG, with the help of three time Rally Champion and Skyfall stunt driver Mark .\r
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Car website: Audi Q7 V12 TDI vs Noble M400 Audi is AWD Which car do you .
