2019 Porsche 911 GT3 RS - What’s not to love about the most track-focused 911 yet? The GT3 RS is powered by a naturally aspirated, 4.0-litre flat-six that revs to 9000 rpm, develops 520 horsepower, and is sure to feature razor-sharp throttle response. That engine is mated to a seven-speed double-clutch gearbox delivering power to massive 325-section rear tires to produce a 3.2-second sprint to 100 km/h.