Audi R8 V10 Plus, Porsche 911 Turbo S, Litchfield GT-R. Track, Drag-Race - /CHRIS HARRIS ON CARS

First big group test of 2013. Audi's R8 has a new dual-clutch transmission, the Turbo S is on its way out and for £20k, Litchfield will give you a 750hp GT-R than can handle normal roads. Game on.