Porsche 997 GT3 RS

This reduction in weight is achieved, inter alia, by the use of an adjustable rear wing made of carbon, an extra-light plastic rear window, and the use of lightweight bucket seats. The car’s power-to-weight ratio, as a result, is just 4.5 kg/kW. Like the 911 GT3, the 911 GT3 RS is powered by Porsche’s very fast-revving 3.6-litre developing maximum output of 305 kW (415 bhp) at 7600 rpm. Maximum engine speed is 8400 rpm. Benefiting from its six-speed gearbox with a single-mass flywheel and close gear increments, as well as a reduction in weight by another 20 kilos or 44 lb compared with the GT3, the engine revs up even more spontaneously, with the Porsche 911 GT3 RS accelerating to 100 km/h in a mere 4.2 seconds, one-tenth of a second faster than the 911 GT3. This dynamic acceleration then continues in just 13.3 seconds overall to 200 km/h or 124 mph. And top speed, finally, is 310 km/h or 192 mph.