With over 1,500 units sold to date, it’s probably safe to say that the SR3 is one of Radical Motorsport’s most successful products in history. Prototype-style racing cars make up the majority of the grid in 12 different Radical Cup championships around the world and for the 2023 season, the company has a new surprise addition to its lineup. The SR3 XXR is a more refined and hardcore version of the old car which is now available to order.
The highlight of the new trim for the race car is the new 1.5 liter engine, which has been completely developed in-house. With an output of 232 horsepower (171 kilowatts), the plant can run on biofuel, making the SR3 XXR the first Radikal model to run on biofuel. The high output unit gives this light machine an impressive power-to-weight ratio of over 350 hp per tonne.
Other new standard features not previously available or optionally available on the SR3 include a new pit limiter which keeps the vehicle at the pit speed limit in a racing environment. Also new is the LMP-inspired center tail shark fin, which Radical says provides aerodynamic improvements to entry stability and center angle. The list of optional extras includes a carbon fiber splitter and carbon fiber rear diffuser.
Another notable improvement over the standard SR3 comes in the form of a new braking system. It has been developed in collaboration with AP Racing and should provide increased performance thanks to reduced unsprung mass and better pedal feel.
Complementing the hardware upgrades is a series of powertrain tweaks, including a redesigned oil system, new engine and gearbox calibrations, a fuel composition sensor that enables the use of biofuels, and more. The company’s main goal – apart from increased performance – is better durability under heavy loads.
The new SR3 XXR is now available to order through Radical’s global retail network with dealers in 21 countries worldwide. The race car will start production in February next year with first deliveries expected at the end of the same month.