There’s a day in month so that must mean it’s time for another stupidly powerful Brabus. And this one is claimed to be “the world’s fastest and most powerful four-seat cabriolet.” Goody.

It carries the catchy moniker Brabus 850 6.0 Biturbo Cabrio and, as you can see, it’s based on the rather lovely Mercedes S-Class drop top. As the name suggests, the power station under the bonnet produces 850PS – or 838bhp. That¬†translates to a top speed of 217mph, which would surely be enough to peel the face off anyone sat in the back.

Surprisingly the engine isn’t the 6.0-litre V12 found in the S65, but the 5.5-litre V8 from the S63. It’s stretched out to 5.9-litres and beefed up with forged pistons, conrods and crankshaft. Machined cylinder heads, a better exhaust manifold and a pair of new turbos the size of a washing machine drum are bolted on as well.

A carbon air intake and ducts and gold heat reflection finish off the engine bay. And, of course, there’s a 3in sports exhaust with a bypass valve if you want to be anti-social.

Alongside the 838bhp, the motor twists out 1069lb/ft of torque, but it has to be wound back to 848lb/ft so the drivetrain doesn’t explode under the strain. Four-wheel-drive doles out the power through a seven-speed automatic gearbox, enabling a 0-62mph time of just 3.5secs.

Incidentally, that 217mph top speed is limited due to “tyre limitations.” Well, it does weigh rather more than two tonnes.

The styling is appropriately – and subtly – beefed up, while interior options are pretty much limitless. Price is in the ‘if you have to ask’ bracket – the AMG S63 Cabriolet base car costs ¬£135,675 and you can probably double that easily.

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By Only Motors