Great video comparison here of the Audi R8 5.2 FSI quattro and the Porsche 911 Turbo against the Nissan GT-R. A must see!
Nissan GT-R: Powered by a 3.8 L twin-turbocharged DOHC V6 engine that produces 473 horsepower with a peak torque of 430 lb-ft. 0 to 62 mph comes in at 3.5 seconds with a top speed is limited at 193-mph.
Porsche 911 Turbo: Power comes from a 3.8L flat-six boxer turbocharged engine making 500-hp with a maximum torque of 516 lb-ft. When combined with Porsche new PDK 7-speed dual-clutch transmission, the 2010 911 Turbo goes from 0 to 60 mph in just 3.2 seconds and keeps going to a top speed of 194 mph.
Audi R8 5.2 V10 FSI: Power comes from a 5.2L V10 producing a total of 528-hp. Mated to a R-tronic transmission the R8 5.2 V10 FSI quattro goes from 0 to 60 mph comes in just 3.9 seconds with a top speed of 196 mph.
Source: eGM Cartech