Radical History:
Radical’s first car, the 1100 Clubsport, was based on a Kawasaki motorcycle engine placed inside a small open-cockpit chassis which could house two adults. The cars were intended to run in the 750 Motor Clubsraces under the Sports 2000 category, with co-founder Hyde driving. Radical had built enough 1100 Clubsports that they decided to create a one-make series based around the car in 1999. Backed by the British Racing and Sports Car Club, the series featured identical cars that were open to anyone who owned an 1100 Clubsport. The same year, Radical debuted their second model, the Prosport. Radicalsnext creation was the SR3, a car which could compete in international racing, such as the FIAsC3 class. The car uses a Suzuki-based engine tuned by Powertec engine which offered 1300 cc or 1500 cc versions and a maximum of 252 hp in the latter. A six-speed sequential gearbox was developed specifically for the car to improve performance. The SR3 could also be road legal in the United Kingdom with the addition of turn signals, a hand brake, a catalytic converter, and road legal tires. Radical was later able to move into the CN class of cars, used in VdeV and hill climbing events throughout Europe. The SR5 was based around a Honda VTEC V6 which could produce 237 hp, although a Ford Duratec was also available.

Radical Overview:
Radical Sportscars is an auto manufacturer and constructor of racing cars from England. The company was founded in January 1997 by amateur drivers and engineers Mick Hyde and Phil Abbott, who built open-cockpit sportscars which could be registered for road use and run on a track without modification. Although most of Radicalssportscars are road legal, they also build some purpose-built racing cars, such as the SR9 Le Mans prototype.

Other Radical Details:
Radical currently sells six different models, all of which can be converted to street use in certain countries except for the SR9. Various options, most notably in the power plants, are available on all of the cars. Models include; SR3 Supersport, SR4 Clubsport, SR5 CN, PR6 Prosport, SR8 and SR9 LMP2.The most popular Radical model, over 300 SR3s have been built. The car is built on a spaceframe chassis, and uses a variety of Powertec-tuned motorcycle engines for power. Turbo charging is also available on the motors for even more power. Although this car shares most of the engine and power train from the SR3, the SR4 features all new bodywork and under tray, including a front diffuser, in order to make it a more capable track car. Also widely used in various national racing series. Built for international competitions, including hillclimbs and endurance events, the SR5 features either a Honda or Ford production V6 for more power. A variety of gearboxes are also available, with either a manual or pneumatic semi-automatic. The replacement for the original Prosport, the PR6 is a purpose-built race car designed to meet SCCA and MSA regulations. The PR6 features a single-seater cockpit, with many aerodynamic elements from the SR4 added. Based on the SR3, the SR8 is a more extreme version intended for street and track use. The SR8 also features the largest engine Radical has ever put in their road cars, with the 2600 cc Powertec RPA V8 constructed by combining elements of Suzuki inline-4s, and producing 363 hp.Radicalsfirst Le Mans Prototype, the SR9 is built to full LMP2 regulations. It is able to be run in the American Le Mans Series, Le Mans Series, and 24 Hours of Le Mans. Engines include a Judd XV675 3400 cc V8 or a turbocharged Advanced Engine Research (AER) P07 2000 cc Inline-4.