Porsche has ramped up the already-heady performance of the 911 GT3 RS through the adoption of a new naturally aspirated 4.0-litre version of the company’s venerable horizontally opposed flat six-cylinder engine.
The new Porsche Motorsport-developed unit kicks out 50bhp more than the 3.8-litre six-cylinder powerplant used in the existing 911 GT3 RS, producing a 911 Turbo-equalling 493bhp at a soaring 8250rpm, or some 350rpm higher than before.
Along with the increase in peak power, the highest displacement engine ever offered in a roadgoing version of the 911 also develops an additional 22lb ft of torque, taking the figure to 339lb ft. The maximum twist is now developed 1000rpm earlier in the range at 5750rpm, promising a more flexible delivery.
Porsche claims a 0-62mph time of 3.9sec for the 1360kg 911 GT3 RS 4.0, a scant 0.1sec inside the time quoted for the old model. It also quotes a 0-124mph (200km/h) time of under 12sec, although it points out that the gearing and aerodynamics of the new car, like those of its direct predecessor, can be altered. The old 911 GT3 RS was rated at 13.3sec.