Porsche

Both the 911 Carrera Coupe and 911 Carrera S Coupe received new engines for 2009. Thanks to a 6.2 percent increase in horsepower, the 3.6-liter engine goes from 325 to 345 hp. Similarly, there's a 5.5 percent gain in torque, from 273 to 288 lb.-ft.

The 3.8-liter engine in the more potent 911 Carrera S Coupe exhibits equally awesome results. This hedonistic acceleration is compliments of the new 3.8-liter engine's gain of 30 hp, from 355 to 385 hp, or 8.5 percent, and a 5 percent improvement in torque, from 295 lb.-ft. to 310.