Revealed in September before debuts at this year’s Paris Motor Show, Mercedes has now disclosed full prices for its new AMG GT and GT C Roadsters.

Introducing two roadster variants means that the AMG GT line-up is now five models strong. Both of these new models pack more power and torque than their equivalent hardtop versions, and borrow chassis technology from the hardcore AMG GT R.

The AMG GT Roadster is on sale now, starting at £110,145, while the more powerful GT C version kicks off at £139,445.

The entry AMG GT Roadster develops 469bhp and 630Nm of torque from its 4.0-litre twin-turbo V8, which is 13bhp and 30Nm more than the hardtop. Above that sits the AMG GT C Roadster, with a full 549bhp and 680Nm – that puts it between the 503bhp GT S coupe and 577bhp GT R. All AMG GT models use Merc’s seven-speed dual-clutch automatic gearbox.

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The power bumps mean that the AMG GT Roadster is capable of 0-62mph in four seconds flat – identical to the hardtop – while the GT C Roadster does the same sprint in 3.7 seconds, one-tenth quick than the S coupe. Top speeds are claimed at 188mph and 196mph respectively.