2013 Mercedes-Benz SL63 AMG (2012 Geneva Auto Show)

it's 275 pounds lighter than the model it replaces, thanks largely to the use of high-strength but lightweight aluminum parts. Even so, this bad boy tips the scales at just over 4,050 pounds, but never fear -- there's one heck of a powerplant underhood to get this grandaddy moving with a quickness. Just like the entire new crop of AMG products, the SL63 uses Merc's twin-turbocharged 5.5-liter M157 V8, good for 530 horsepower and 593 pound-feet of torque. Tick the box for the optional AMG Performance Package and those numbers increase to 557 and 664(!) respectively. With that additional grunt, the SL63 will shoot to 60 miles per hour in just 4.1 seconds (4.2 without the Performance Pack), on its way to relaxed top speed of 186 miles per hour (non PP-equipped models top out at 155).