Mercedes-AMG reveals GT C roadster

Mercedes-AMG has revealed drop-top variants of its GT supercar.

The new GT Roadster and GT C Roadster are based on the existing GT coupe, and have the same 4.0-litre twin-turbo V8 powering the rear wheels through a seven-speed, dual-clutch transmission.

There are a number of differences between the two models. The entry-level GT Roadster makes 469bhp and 465lb ft of torque, can sprint from zero to 60mph in four seconds flat and will top out at 188mph.

The top-of-the-range GT C's V8 engine is offered in a higher state of tune, making 550bhp and 502lb ft. It's 65kg heavier at 1735kg because of extra technical equipment such as rear axle steering, but it's still faster. Nought to 60mph takes 3.7 seconds, while top speed increases to 196mph.

Mercedes-AMG reveals GT C roadster

Mercedes-AMG reveals GT C roadster

The dual-clutch transmission has been altered slightly to deal with the new power levels of the GT C. First gear has a higher ratio, and seventh and the final drive have a lower ratio to improve the engine's responsiveness under acceleration.

The GT C is also more aggressive looking, with a wider track and bigger wheels. Other technical improvements include variable dampers, a performance exhaust system and an electronically controlled locking differential.

The roof can open and close in 11 seconds and can be operated at speeds of up to 31mph. It can be specified to be red, beige or black.

Both the Mercedes-AMG GT Roadster and GT C Roadster will be on display at the Paris Motor Show at the end of the month where more details are expected to be revealed.