Radical SR3 XXR Breaks Cover: A Track Weapon Tuned for Biofuel

Radical has unveiled the SR3 XXR, a refreshed take on its established track-day racer that now arrives biofuel-ready straight from the factory. The move signals the niche British builder’s intent to keep its customer racing platform relevant as circuits and series increasingly weigh sustainable fuel options.

Beyond the alt-fuel compatibility, the XXR package centers on a reworked formula aimed at sharper lap times. Radical has leaned on its years of experience supplying amateur and pro-am racers to sharpen the car’s behavior, with the upgrades framed around quicker, more repeatable pace rather than outright headline power.

The SR3 line has long been a fixture at track days and one-make championships, prized for its lightweight construction and approachable running costs relative to full-blown prototypes. Making the platform biofuel-capable broadens where owners can campaign it without forcing a wholesale redesign.

For Radical, the XXR is less about reinvention and more about evolution – keeping a proven package competitive while acknowledging that the fuel conversation in motorsport is shifting. Expect the car to appear at track events and series where sustainable fuels are being trialed.