The Porsche Cayman GT4 RS was never supposed to exist. For years, Porsche kept the Cayman deliberately behind its 911 models — faster than its mid-engined sibling was something the company couldn’t quite bring itself to allow. Then the decision came to make the next Cayman fully electric.
And before that door closed, Porsche finally relented. The engine is the story. It’s the same 4-litre naturally aspirated flat-six used in the 992 GT3 — a motorsport-derived unit that revs to 9,000 RPM, producing 500 horsepower at 8,400.
That’s 80 more than the standard GT4. Torque peaks at 450 Nm at 6,750 RPM. The numbers are impressive, but they don’t capture what actually happens when you open the throttle above 6,000 RPM.
Ferocious is the only accurate word. A significant part of the experience comes from the air intake system, which places the airbox directly behind the driver’s ears. The intake sound at full throttle is something you genuinely cannot describe — it has to be experienced.
Acceleration figures: 0-100 km/h in 3.4 seconds. 0-200 in another 7.5. The PDK ratios are the shortest ever fitted to a Porsche GT car.
Downforce is 25 percent higher than the standard GT4. On track the GT4 RS is fast and deeply rewarding. The steering is exceptionally sharp and communicative.
The car tells you everything. On public roads it’s a different proposition. The lack of noise deadening means every mechanical sound reaches the cabin.
At legal speeds it feels constrained, like an athlete asked to walk slowly. This is a car built to celebrate a specific thing: the naturally aspirated high-revving flat-six in its most direct, most committed form. Before electrification changes everything, the GT4 RS stands as the fullest possible expression of what that engine can be.