Here's an interesting comparison test between the 2013 Nissan GT-R and the Alpina B6, which was conducted on the Brands Hatch race track in Britain. The 2013 Nissan GT-R is powered by a 3.8-litre twin-turbo V6 engine that sends 550PS and 632 Nm of torque to the car's four wheels. The 2013 GT-R is rated with a 0-62 mph (0-100 km/h) acceleration time of 2.7 seconds. The Alpina B6 Biturbo, which is based on the BMW 6 Series, is powered by a twin-turbo 4.4-litre V8 engine, which is good for 532bhp between 5,200 rpm and 6,250 rpm and 538 lb-ft of torque at just 2,800rpm. The Alpina B6 can accelerate from zero to 62 mph (100 km/h) in 4.3 seconds.