While AMG is starting to replace its high-revving, naturally aspirated 6.2-liter V-8 with the twin-turbocharged 5.5-liter V-8 (as seen in the S- and CL-classes), we suspect that the SLS roadster will keep the crazy 563-hp 6.2, which produces 479 lb-ft of torque. It is not only a trademark engine for the SLS, it fits the character of this sports car exceedingly well—and, with the top down, you will be even better able to listen to this engine's awesome soundtrack. With structural reinforcements and the convertible-top mechanism no doubt adding weight, performance could drop slightly.