In Car and Driver testing, the GT4 RS got to 60 mph in 2.8 seconds. The only 911 models quicker than that were the 911 Turbo, Turbo S, GT3, and GT2 RS. The GT4 RS’s result is also half a second quicker than the standard GT4 with the PDK dual-clutch automatic. Using launch control, the GT4 RS hooks up hard and requires only 1.1 second to reach 30 mph, matching the GT3 and C8 Corvette’s performance. It races through the quarter mile in 11.0 seconds at 126 mph, but by then a 911 GT3 has caught up and passed through 0.1 second sooner. Stay in it, and 150 mph arrives 5.8 seconds later, a second behind the GT3.
Take this with a grain of salt. It's s side-by-side lap ion the GT4RS and the 992 GT3 at Spa Francorchamps during the Porsche Master GT Event in April 2022.
I drove the GT4RS for 2 full days so got to feel very comfortable and confident of the car, while I drove the 992 GT3 for just a 20 min session in the middle of day 2.
As I reflected in the earlier posting, the GT4RS enters the corners at higher speeds and maintains good balance inside, while the GT3 has a powerful exit (more stable on acceleration vs. the jittery GT$RS). The GT4RS manages slightly higher end of straight speeds.
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