Vicky Parrott recently drove the Mercedes-Benz SLS AMG Roadster for UK motoring magazine Autocar to see how it compares to its gullwing-doored counterpart. Powered by that glorious 6.2 L V8 engine which produces 420 kW (571 hp) and 649 Nm (479 lb-ft) of torque, the SLS Roadster takes just 3.7 seconds to crack 100 km/h (62 mph), before hitting an electronically limited 318 km/h (197 mph).