New Porsche 911 GT4 R replaces Cayman racing car

The retirement of the Porsche 718 Boxster and Cayman will not only take away the “access” sports cars from the German brand, but will also leave a gap in its competition division. In fact, I would, because the manufacturer has already solved the problem and the solution could not have been better. It has just presented the 911 GT4 R.

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For the first time, Porsche will use the platform of the traditional 911 in the GT4 category, replacing the Cayman-derived models that have been representing the brand since the creation of the program. The novelty also helps to explain the differences between the GT3 and GT4 categories, today the two main gateways for GT motorsport teams and drivers around the world.

Although they share the same philosophy of using cars derived from production models and are regulated by the FIA with a Balance of Performance (BoP) system, GT3 and GT4 have different proposals. GT3 represents the highest level of GT motorsport for customer teams, bringing together cars that are faster, more aerodynamically sophisticated and with greater freedom of technical development. Currently, the category is the main global platform for GT motorsport, present in world, continental and national championships.

The GT4 was conceived as a category of more controlled costs, with cars closer to the production models and greater technical limitations. The objective is to reduce operating expenses and offer an intermediate stage between single-make championships and GT3 competitions. While it also uses Balance of Performance to equalize competitors, GT4 more intensely restricts aerodynamic elements, tires, electronics and development possibilities.

Porsche’s decision to bring the 911 to GT4 reflects precisely this logic of sporty progression. The new 911 GT4 R was developed from the current 911 GT3 Cup of the 992.2 generation, sharing architecture, engine and various components with the car used in the manufacturer’s one-make competitions. According to Porsche Motorsport, this will allow for a more natural transition for drivers and teams looking to advance to GT4 championships without abandoning the 911 platform.

The new model uses a 4.0-liter six-cylinder naturally aspirated boxer engine, capable of developing up to 520 hp. However, following GT4 rules, effective power can be reduced by intake restrictors to meet the Balance of Performance parameters set by the organisers of each championship.

Regulatory differences also appear in the construction of the car. While the 911 GT3 Cup uses wheels with central attachment, a typical solution for GT3 cars and prototypes, the new GT4 R adopts wheels fixed by five bolts, as in street cars. The wheels are also narrower, another specific requirement of the GT4 category. The suspension offers limited, standardized adjustments, reducing development and maintenance costs.