2010 AUDI R8 5.2 FSI (more info)

Monster 525-hp V-10 engine complimenting the 420-hp V8 model

It is said that the V-10 engine weighs only 68 pounds more than the V-8 and the fuel economy with the bigger engine will only worsen by 1 mpg

0-60 in 3.7 seconds
a quarter mile in 11.8 seconds at 121 mph