550bhp Aston Martin Rapide S unveiled

Aston Martin's luxury four-door cruiser gets a massive 80bhp power hike as British brand refreshes the model for 2013.

The naturally aspirated 5.9-litre V12 engine has been given the onceover and it now produces a hair-raising 550bhp while peak torque is now 820 NM. The engine tweaks are also said to have improved low to mid-range torque, making acceleration and overtaking even punchier.