The most powerful high-performance sedan in the luxury segment sets new standards in terms of driving dynamics, lightweight construction and efficiency. Performance enthusiasts will be most interested in power, and the S63 AMG certainly has it. The sedan’s latest version makes 577 hp and a whopping 664 lb-ft of torque. That’s a boost of 41 hp and 74 lb-ft over the already muscular outgoing model. The power comes from a 5.5-liter, twin-turbocharged V8.