Technical Regulations


Significant changes were introduced on WRC’s engine regulations in 2017, which remain in place for the 2018 season. An increase in air restrictor size from 33mm to 36mm, and a boost in overall power from 315 to around 380 horsepower gave cars a more aggressive sound. WRC cars continue to run with 1.6-litre engines with Hyundai Motorsport retaining its T-GDI concept.


The minimum weight for a WRC car is 1,190kg, having been reduced from 1,200kg for the 2017 season. A 10kg difference may seem insignificant but WRC is all about the finer margins! Any weight saving contributes to the overall performance of the car.


Visual changes introduced for the 2017 season remain in place. A 55mm increase in minimum width gave cars a striking new look. Larger overhang at the front and rear have given WRC machinery a more purposeful appearance.

Power Train

The Power Train is home to some of the most high-tech components in a WRC car, including the 4x4 system. The electronic central differential complements sequential gearboxes and other systems, ensuring modern day WRC cars are state-of-the-art.


WRC cars have a number of aerodynamic devices including wings at the front and rear of the car in order to improve the car’s downforce. Larger rear wings have become more efficient, giving drivers more grip on high-speed rally stages.

The regulations for cars entering the WRC are set by the Fédération Internationale de l’Automobile (FIA). Competing cars must be based on the bodyshell of a standard road car – in Hyundai’s case: the Hyundai i20 Coupe. Manufacturers also have to fulfill the requirement of a worldwide production of over 25,000 units of their chosen model per year. There are also several regulations, which can change year on year, that involve certain individual parts of the cars.