The 2011 Porsche 911 GT3 RS 4.0 is the latest evolution of the 997 GT3. The 4.0 flat-six produces 493 horsepower (368 kiloWatts) and 339 pound-feet (460 Newton-meters) of torque, for acceleration from 0 to 100 62 miles per hour in 3.5 seconds and a top speed of 193 miles per hour. Only 600 samples of the 911 GT3 RS 4.0 were produced.