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
\r
\r
\r
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
\r
\r
\r
Car website: Audi Q7 V12 TDI vs Noble M400 Audi is AWD Which car do you .