The Porsche 911 GT3 is a higher performance version of the Porsche 911 sports car.  It is the latest in a line of high-performance models, beginning with the 1973 911 RS.  The GT3, named after the Fédération Internationale de l'Automobile (FIA) GT3 European Championship it was designed to compete in, has a 3.6-litre naturally-aspirated six-cylinder engine, based on the unit used in the Porsche 962 and Porsche 911 GT1 race cars.

The 911 GT3 RS 4.0 is the final evolution of the 997 and features a 4.0 litre engine.  The engine itself uses the crankshaft from the RSR with increased stroke dimensions (from 76.4mm to 80.4mm).  This change has increased the power to 368 kW (500 PS; 493 hp) at 8250 rpm and 460 N·m (339 lbf·ft) of torque at 5750 rpm.

Chassis development has been influenced by the GT2 RS and uses bits from other RS 911s.  Front dive planes give additional downforce up front.  The car weighs in at 1,370 kilograms (3,000 lb), giving it a power-to-weight ratio of 365 bhp per ton.  The RS accelerates from 0-100 km/h (62.1 mph) in 3.9 seconds and has a top speed of 310 km/h (193 mph).

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