One might think that the regular SL-Class, a sleek two-seater that can reach 62 mph in 4.5 seconds, would be all that drivers need. AMG engineers obviously disagree, as they’ve constructed the SL55 AMG. Not only does this car employ 517 horsepower to match that sub-five-second sprint, but also it adds a sport-tuned suspension, composite brakes, and more aggressive body cues. Not quite enough? Opt for the SL65 AMG and its 612-horsepower bi-turbo V12 that shaves another three-tenths of a second off that 0-62 mph romp.