Based on the Audi R8 Spyder, the GT S has a retuned 5.2-liter V10 engine which produces 620 PS (456 kW / 612 hp).

Abt Sportsline has unveiled the new R8 GT S at the Geneva Motor Show.

Based on the Audi R8 Spyder, the GT S has an aggressive appearance thanks to a red chrome wrap, a sport exhaust system, and an extensive carbon fiber body kit. To cap things off, the car rides on a lowered sport suspension and 20-inch alloy wheels.

Inside, the cabin is outfitted with two-tone leather sport seats, red carbon fiber trim, special floor mats, and illuminated door entry guards.

In terms of performance, the 5.2-liter V10 engine has tuned to produce 620 PS (456 kW / 612 hp) - an increase of 95 PS (70 kW / 94 hp). This enables the GT S to accelerate from 0-100 km/h in 3.6 seconds, before hitting a top speed of 320 km/h (199 mph).

Gallery: Abt Sportline R8 GT S goes topless in Geneva