We were never a big fan of the four-door coupe concept, but the AMG GT 63 is a little bit different. Not necessarily because it is a good-looking car – it is not – but because it is quite very powerful. It is powered by a 4.0-liter twin-turbo V-8 engine that delivers a total of 639 horsepower and 663 pound-feet of torque, making it the most powerful AMG ever.

The guys over Posaidon however decided it can be even more powerful. They opted for upgraded turbochargers, an extension of the charge air cooling system, sports air filters and downpipes with sports catalytic converters. The result is an amazing 830 horsepower and 811 pound-feet of torque. With the extra power, the Posaidon RS 830 goes from 0 to 100 km/h (62 mph) in just 2.9 seconds and up to a top speed of 350 km/h (217 mph). Posaidon is also offering a RS830 version that delivers a total of 880 horsepower and 885 pound-feet of torque.

The price for this upgrade is 24.000 euro.

Posaidon RS 830 picture gallery