The switch from the 718 Cayman platform brings meaningful gains, including a larger, GT3-derived engine, wider track widths and more advanced motorsport electronics. Based on the existing 992.2 Carrera Cup car, the new GT4 racer carries over the widened front wheel arches, bonnet and arch louvres, and side intakes ahead of the rear wheels. A serrated front splitter features at the nose, while an 11-stage adjustable wing sits atop the engine cover.


In the interests of weight saving, natural fibre-reinforced plastic features on the aerodynamic elements, doors, engine cover and cabin panels.The new car is powered by the familiar 4.0-litre flat-six, developing 424bhp with a pair of 53.7mm air restrictors fitted, down from 513bhp in unrestricted form. The torque output has been similarly throttled, with the original 347lb-ft cut to 311lb-ft with the restrictors in place. Those outputs – along with the car’s expected 1,260kg dry weight – will be subject to change by series-specific Balance of Performance measures, allowing a broad variety of cars with differing drivetrains and body styles to compete fairly.
Drive is sent to the rear wheels through a six-speed sequential gearbox, with a four-plate sintered metal race clutch and mechanical locking differential. Double wishbones up front and a multi-link rear axle are paired with two-way adjustable dampers at each corner and three selectable spring rates. Adjustable anti-roll bars feature at both ends. The new racer also runs a five-nut design instead of centre-locking wheels, which are not permitted by GT4 regulations.


The stripped-out cabin features a roll cage and a flat 10.3-inch instrument display in place of the road car's curved five-dial screen. An integrated data logger and GPS system allow teams to capture and review on-track data, with the latter relaying the car's exact position while on track. Tyre pressure and temperature monitoring is also included.
Porsche has built over 1,500 Cayman GT4 racers since entering the category in 2016, meaning the 911 GT4 R has a lot to live up to. It begins racing in 2027, taking on domestic and international championships, and replacing the Cayman GT4 Clubsport in the GT4 category. Prices start from €265,000 excluding local taxes – equivalent to £228,000 at current exchange rates.


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