Tiff and Jason race two of the fastest off-roaders currently on sale, the Audi Q7 V12 and the Porsche Cayenne Turbo, Jonny heads to Seville to test the latest offering from Lotus, the Evora S, Vicki tells us everything we need to know about the new Jaguar XJ, and Jason takes the most powerful road-going Porsche ever made to Silverstone, the 911 GT2-RS.