Who said you had to give up speed to gain interior space? Available in both sedan and wagon models, the 2014 Mercedes-Benz E63 AMG 4Matic ($TBA) has everything it needs to keep up with the fastest of sports cars. Powered by a 5.5-liter AMG V8 Biturbo, it boasts 550 hp — 577 on the S-Model — and an AMG Speedshift MCT 7-speed sports transmission to hurtle it from 0-60 in just 3.5 seconds on its way to a top speed of 186 mph. Permanent all-wheel-drive ensures that power gets to the pavement, and, of course, it's still an E-class, with all the interior refinement you'd expect. Arriving this summer.