2019 Porsche 911 GT3 RS - What sets the GT3 RS apart is an almost obsessive level of attention to detail that permeates the entire car. The engine is a screamer. Peak output, 513 horsepower (SAE) arrives at 8250 rpm and the cut-off is set at a mind-bending 9000 rpm, while maximum torque is delivered at 6000 rpm.