Radical Sportscars was founded in January 1997 by Mick Hyde and Phil Abbott, building a reputation for extreme lightweight sportscars that could be registered for the road while delivering genuine circuit performance without modification. The company's flagship models evolved through successive generations, with the SR8 establishing the high-performance benchmark using a bespoke V8.
The SR10 was developed as an alternative at the top of the Radical range, addressing one of the SR8's practical limitations: the complexity and servicing demands of its motorcycle-derived V8. By adopting the Ford EcoBoost 2.3-litre four-cylinder turbocharged engine — the same basic architecture used in performance road cars — Radical was able to offer longer service intervals, more accessible parts supply, and greater powertrain durability without substantially sacrificing performance.
The SR10 is powered by the Ford EcoBoost 2.3-litre four-cylinder turbocharged unit, producing 425 hp (317 kW) and 380 lb-ft (515 Nm) of torque. The combination of turbocharged torque delivery and Radical's extremely lightweight chassis yields performance figures that match and in some areas surpass those of the naturally aspirated SR8.
Acceleration from 0 to 60 mph is achieved in 2.4 seconds, marginally quicker than the SR8's 2.7 seconds, reflecting the additional torque available from the turbocharged engine. Top speed reaches 180 mph (290 km/h), again fractionally ahead of the SR8's 178 mph figure.
The SR10 retains the proven steel spaceframe chassis and polyester bodywork that underpin the rest of the SR range, ensuring that the weight advantage central to Radical's performance philosophy is preserved. The drivetrain layout and aerodynamic package follow established Radical practice, keeping the car's centre of gravity low and the downforce levels high relative to its mass.
The choice of the Ford EcoBoost engine reflects a broader strategic consideration within Radical's product range. The motorcycle-derived engines used in models such as the SR3 and SR8 deliver extraordinary power-to-weight ratios but require specialist knowledge to service and can demand more frequent attention than mass-produced automotive engines. The EcoBoost unit's wider availability in the mainstream automotive supply chain simplifies ownership logistics for customers who intend to use the car frequently on track without access to specialist engineering support.
The SR10 therefore occupies a position as a high-performance alternative within the Radical range that is arguably more practical for intensive track day use, while still delivering performance that comfortably exceeds that of most dedicated racing machinery. The turbocharged torque curve also provides different driving characteristics compared to the high-revving naturally aspirated V8 of the SR8, offering a broader power band that some drivers find easier to exploit consistently.
The SR10 sits alongside the SR8 as one of Radical's most powerful road-registrable offerings. The SR3 beneath it uses a 225 hp RPE four-cylinder engine and represents the volume core of the Radical range, with over 1,000 units produced. The SR8 defines the outright performance flagship with its bespoke V8. The SR10 bridges the gap between extreme performance and day-to-day serviceability, using mainstream Ford componentry to make the upper end of the range more accessible to a wider owner base.
Both the SR8 and SR10 share the same fundamental chassis lineage traced back to the original SR3 launched in 2001, demonstrating the inherent flexibility and performance headroom in Radical's core architecture.