Auto Express magazine’s Sam Hardy recently headed over to the south of France to try out the new Mercedes-Benz SL 63 AMG. Powered by AMG’s M 157 5.5-litre V8 biturbo engine, which produces 395 kW (537 hp) and 800 Nm of torque, the lighter R231 SL 63 AMG cracks 100 km/h (62 mph) in just 4.3 seconds, or 4.2 s with the AMG upgrade.