Mercedes G55 AMG

Four huge side exit exhausts and a liberal sprinkling of chrome trim complete the package, which is topped off with a couple of AMG badges. Powered by a supercharged 5.5-litre V8 engine, the 469bhp machine's performance is as preposterous as it sounds.

Frankly, powering a G-Wagen with a supercharged V8 engine is like using a Derby-winning race horse to tow a Victorian milkfloat. It's hugely expensive and completely inappropriate, given the G-Wagen's heavy chassis.

The car's straight-line acceleration is incredible, and under full throttle, there are few cars capable of matching its pace. The 0-62mph sprint is dispatched in a Porsche 911-beating 5.6 seconds, and top speed is an electronically limited 130mph.

Quite what it would feel like at 130mph is anyone's guess, as even on a relatively straight road at cruising pace, the steering needs constant inputs. Refinement is appalling, too - there's plenty of road noise from the tyres, while wind roar from the almost flat windscreen is noticeable from only 50mph. And if you catch a pothole, the stiff suspension sends the crash shuddering through the cockpit.

The smoothness of progress is also undermined by the five-speed auto gearbox, which slurs slowly through its changes, and kicks down roughly as soon as the throttle is pressed.

Curiously though, despite all this, a spell behind the wheel of the G-Wagen is great fun. Few cars have such character, or road presence. The roar of the exhausts brings almost any high street to a complete stop, while the acceleration is amazing. But it's only enjoyable in small doses - as a long-term prospect, this G-Wagen is just too extreme.