GT4

GT4 is an acronym that can refer to two distinct subjects in automotive culture: a production-based grand touring race class governed under FIA and SRO regulations, and Gran Turismo 4, a racing video game in the Gran Turismo series.

In motorsport, GT4 (also known as FIA GT4) is a class designed to provide affordable, competitive racing beneath GT3. Cars are based on production GT models with limited modifications. The category uses Balance of Performance adjustments to equalize performance across different makes and models. GT4 is employed in a range of national and regional series as well as international events, contributing to a global ecosystem of endurance and sprint races featuring lightly modified, production-derived cars. Common examples of eligible or frequently seen GT4 cars include models from Porsche, BMW, Mercedes-AMG, Ford, and Chevrolet.

Gran Turismo 4 is a 2004 video game developed by Polyphony Digital and published by Sony Computer Entertainment for the PlayStation 2. It is the fourth mainline entry in the Gran Turismo series. The game expands the car roster and racing tracks and emphasizes driving realism, including detailed tuning options and realistic physics for its platform. It built on the series’ emphasis on simulation, offering numerous events, licenses, and driving challenges as part of its single-player experience.

Together, GT4 denotes both a formal racing category and a long-running racing video game, illustrating the term’s use across motorsport and gaming contexts.