Boasting a 5.5-liter, twin-turbo, hand built AMG V8 engine good for 577 horsepower, the GLE63 S Coupe is the most powerful entry on this list. The astounding output alone might be enough to qualify it for inclusion here, but the most extreme version of Mercedes’ new GLE Coupe is also just as eager to carve a canyon as it is to dominate a stoplight drag race.