What happens when you put a 6.0-litre twin-turbo V12 engine with 630hp in a luxury barge?  The Mercedes-Benz S65 AMG.

The figures speak for themselves.

The biturbo V12 produces 630hp at 4,800-5,400rpm, and an incredible 1,000Nm of torque from 2,300rpm to 4,300rpm.

This monumental power propels the AMG S-Class to 62mph in 4.3 seconds, and on to an electronically-limited top speed of 155mph.

As you can imagine, it’s not a particularly eco-friendly beast, although with a 23.7 mpg thirst and CO2 emissions of 279 g/km it’s perhaps one of the most ‘economical’ V12s in existence.  It’s EU6 compliant, too.

Power is transmitted to the road via a seven-speed AMG Speedshift Plus 7G-Tronic transmission with three driving modes: Controlled Efficiency (C), Sport (S) and Manual (M).  The engine’s stop/start function is active in C mode only.

The S65 AMG features Mercedes’ Magic Body Control system – a stereo camera detects undulations in the road’s surface and pre-emptively adjusts the suspension to match.

Marking the new S65 AMG out from the regular S-Class are a new grille, front splitter, new front and rear bumpers with larger air intakes, twin exhausts and subtle badging.

AMG goodies abound, from the 20-inch AMG light-alloy wheels to the AMG sports seats and bespoke steering wheel.

UK pricing and specifications have yet to be announced.