Meet The Radical SR1 XXR: Entry-Level Model Gets Huge Upgrade

Radical is finally giving its entry-level SR1 the XXR treatment. The first meaningful update to the race car in six years, the new model has experienced design and engineering improvements to help durability and ease of use. A new LMP-inspired central fin is now standard on the rear of the car, but more importantly, the vehicle now features a new generation 5, 1.3-liter engine produced by Radical Performance Engines.

This news follows on the heels of the SR1's two bigger brothers receiving XXR updates over the past few months. Although those vehicles boast more power and greater ability, the SR1 has existed as an approachable entry-level model helping newer drivers get into motorsport ever since it launched back in 2012. Today, 12 international race series exist for the SR1 to compete in giving owners the chance to experience racing in a purpose-built racecar.

Visually, it looks like the SR1 is enjoying upgrades similar to what the SR3 and SR10 have enjoyed, meaning increased downforce and more aggressive looks.

The company has taken a look at the engine and reworked it to focus on reliability and longevity. Radical Performance Engines (RPE) has increased the recommended engine refresh intervals by 25% thanks to the new liquid-cooled, four-cylinder 1.3-liter engine. This Suzuki Hayabusa-derived engine in the old SR1 produces 182 hp, while the updated unit is rated at 199 hp and 120 lb-ft of torque; more than enough when the car weighs about a thousand pounds less than a Mazda Miata.

Oil change intervals have been cut down too, decreased from six to ten hours thanks to a new drive-by-wire induction system. Many of the other engine updates consist of more durability upgrades like a new scavenge pump design and external gear position sensors for the gearbox.