Sport
Rallycross Revolution: Rally4 Cars Poised to Bridge the Gap Between Rallying and RX
For the first time in over three decades, rally specification cars are returning to international rallycross competition. This marks a historic moment for the discipline with the introduction of the new RX4 category. Competitors will now be able to race in a rally one weekend and, with the same car, compete in the FIA European Rallycross Championship the next.
Photo: FIA
A Unified Vision for FIA Motorsport
The FIA has undertaken a significant shift, allowing the same car to compete in two of its premier disciplines – rallying and rallycross – for the first time in history. The RX4 category was approved as part of the development of the off-road racing pyramid. RX4 allows Rally4 class machinery to compete on mixed-surface rallycross tracks. This move is crucial in terms of accessibility and cost reduction, while also reconnecting rallycross with its roots and attracting a new generation of drivers and fans.
Minimal Modifications, Maximum Impact
Based on existing Rally4 regulations, RX4 cars require only minimal modifications for rallycross use. Cars weigh approximately 1080 kilograms and are powered by a 1.3-liter turbocharged engine. The category provides competitive performance while significantly reducing costs – the anticipated car price is around 70,000 euros, considerably less than traditional rallycross machines.
What constitutes these “minimal changes”? This involves removing unnecessary components for rallycross – the co-driver’s seat, headlights, and spare wheel. Some additions are required, such as the option to use polycarbonate windows instead of glass, and an increase to the minimum weight. The rest remains identical, including wheels and tires.
Opening Doors for Rally Drivers
By utilizing existing rally platforms, RX4 offers an accessible pathway into rallycross for drivers already competing in rallying, as well as encouraging newcomers to take their first steps in RX competition. The 2026 season will not have a limit on the number of participants, and the new category is expected to significantly increase championship entries.
Travis Pārs with a Peugeot 208 Rally4 at the Alūksne Rally. Photo: Urmo Sibul
A Long-Term Vision: Rallying and Rallycross Convergence
This initiative is part of the FIA’s long-term vision for closer alignment of rallying and rallycross regulations. From 2028, the top classes of both the World Rally Championship (WRC) and rallycross will utilize a common technical platform, strengthening manufacturer involvement and providing a clearer development path across both disciplines. Alongside RX4, the FIA will also introduce RX5, a category focused on talent development and discovery.
“Last year I started dabbling in FIA rallycross and received a challenging product,” explains James Nixon, FIA Rallycross Sport Director. “We quickly had to figure out how to move this sport forward. Rally cars are very versatile, but rallycross until now had very specific, powerful cars designed for short tracks and maximum acceleration starts. Now the idea is to move towards rally-based cars.”
“We wanted to make it as simple as possible,” says Mateo Romano, Technical Expert for FIA off-road championships. “If you already have a Rally4 car, simply follow the Rally4 technical regulations also in RX4 class. Remove some parts and you’re ready.”
Photo: Martin Grana
A Sustainable Ecosystem for Rallycross
The goal is to bring rallying and rallycross closer together, reduce starting costs, and attract new talent, as well as create a viable used car market. “The fine news is that there are already many Rally4 cars in the world,” Nixon adds. “It should be as simple as a driver can ‘arrive and drive’ from one motorsport to another. If drivers compete in both rallying and rallycross – that would be almost revolutionary.”
Romano added that “We did tests in Finland and the feedback was very good. It happened during a race weekend, and everyone present supported the idea. Tommi Hallman tested the car and said it was very easy to drive, you can quickly reach the limit of its capabilities. If the driver can drive on the limit, there will be exciting battles on the track. Fans will like it, I am 100% sure.”
Frequently Asked Questions
What is the RX4 category?
RX4 is a new rallycross category for Rally4 specification cars, launching in the FIA European Rallycross Championship in 2026.
What modifications are needed to convert a Rally4 car to RX4?
Minimal modifications are required, primarily the removal of the co-driver’s seat and some components unnecessary for rallycross.
How much does an RX4 car cost?
An RX4 car is expected to cost around 70,000 euros.
What is the FIA’s long-term vision for rallying and rallycross?
The FIA aims to align the regulations of rallying and rallycross, with the top classes sharing a common technical platform from 2028.
What is the RX5 category?
RX5 is a new category focused on talent development and discovery, offering a cost-controlled class for young drivers.
Ready to explore the exciting world of rallycross? Visit the official FIA World Rallycross Championship website to learn more and stay updated on the latest news and events.
