Our Engines

RPE have advocated lightweight, high-output Suzuki Hayabusa powertrains in racing applications for two decades. Radical’s unique technical relationship with Suzuki means that the latest 1340cc Generation 4 engines are the most durable combined engine and gearbox packages on the market.

As proven by Radical’s own best-selling SR3 race car, our stroked 1500 variant of the Hayabusa proves you don’t need capacity to deliver outstanding performance. Loved by circuit and off-road racers alike, this RPE-developed variant benefits from bespoke components including a forged Arrow crank and unique Cosworth pistons.

Designed and manufactured in-house by RPE since 2005, the acclaimed Macroblock V8 is the lightest and most compact production racing V8 on the market. Naturally aspirated and high-revving, this 72-degree flat-plane V8 delivers not only exception performance but also an exhilarating soundtrack, whilst remaining cost-effective, simple and reliable to operate.

Radical were the first third-party manufacturer to adopt Radical’s award-winning EcoBoost engine technology in 2011, and since then we’ve developed the 2.0 to astounding heights. Using our experience garnered in single-seater and GT competition, this powerplant is ideal for a range of FIA-mandated championships globally.

The EcoBoost 2.3 is the latest addition to the RPE race engine stable. Our team can offer a range of tuning options suitable for standalone racing applications, or as performance improvements to trackday applications with the engine in its native Ford installation, including the Mustang and Focus ST.

With more comprehensive internal and reciprocating component changes, up to 550hp is now possible from this advanced powerplant. Even at modest boost pressures, the 2.3 High Output variant boasts the highest specific output of any RPE unit, at over 236hp per litre.

As used in the race-winning Radical RXC GT3, the EcoBoost V6 is RPE’s largest and most powerful standard engine line, with power outputs exceeding 654hp in unrestricted form. It’s a durable, torquey and tractable engine, ideal for endurance racing competition and other long-distance, high-performance disciplines.