Road test editor James Disdale pits the all new Audi R8 V10 Plus against the Porsche 911 '991' Turbo. Which four-wheel-drive supercar comes out best - naturally aspirated or turbocharged?
Audi R8 review: http://aex.ae/1M5iyHR
Porsche 911 '991' review: http://aex.ae/1QrOFoy
