Power-to-weight ratio is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of actual performance of any engine or power source. It is also used as a measurement of performance of a vehicle as a whole, with the engine's power output being divided by the weight of the vehicle, to give a metric that is independent of the vehicle's size. Power-to-weight is often quoted by manufacturers at the peak value, but the actual value may vary in use and variations will affect performance.
Judd is a brand of racing car engines built by Engine Developments Ltd., a company founded in 1971 by John Judd and Jack Brabham in Rugby, Warwickshire, England. Engine Developments was intended to build engines for Brabham's racing efforts, and became one of the first firms authorised by Cosworth to maintain and rebuild its DFV engines, but has since expanded into various areas of motorsport.
Group C was a category of sports car racing introduced by the FIA in 1982 and continuing until 1993, with Group A for touring cars and Group B for GTs.
The Toyota TS010 was a Group C racing car built by Toyota for the Sportscar World Championship, All Japan Sports Prototype Championship, and the 24 Hours of Le Mans.
The Peugeot 905 is a sports-prototype racing car built by Peugeot's racing department, Peugeot Talbot Sport. The car was initially unveiled in February 1990 and was developed throughout 1990 before making its race debut at the World Sportscar Championship in the final two races of the 1990 season. The Peugeot 905 participated in 17 races in its career, winning 9 of them.
The Mazda MXR-01 is a Group C sports prototype that was used by Mazda's factory team Mazdaspeed in the 1992 World Sportscar Championship season. It would be the final Mazda entry in sports car racing since the inception of its Le Mans project in 1983. It was based on the Jaguar XJR-14.
The Mercedes-Benz C291 was a sports-prototype racing car introduced for the 1991 World Sportscar Championship season. It was Mercedes-Benz’ final car in the Group C category.
The Lola T92/10 was a Group C sports car developed by Lola Cars as a customer chassis for the 1992 World Sportscar Championship season. It would be the final sports car built by Lola until their return in 1998.
The Nissan R90C was a platform used for Group C racing cars built in 1990 by Nissan Motors for competition in World Sportscar Championship (WSC) based in Europe and the All Japan Sports Prototype Championship (JSPC). The cars based on the basic R90C platform would compete until 1993 before Nissan chose to withdraw from sports car racing, not returning until 1997. It won three JSPC championships and several significant endurance races during its career.
The Nissan P35 was a planned Group C car built by Nissan Motors for competition in the World Sportscar Championship. Developed by Nissan Performance Technology Inc. (NPTI), which had formerly raced under the name Electramotive in the United States, the cars were intended to be completed by the middle of 1992, with competition starting in 1993. However economic troubles for Nissan led to the cancellation of the project soon after testing of the first cars had begun, meaning that the P35s never raced.
Tony Southgate is an English engineer and former racing car designer. He designed many successful cars, including Jaguar's Le Mans-winning XJR-9, and cars for almost every type of circuit racing. He was responsible for the chassis design of Ford's RS200 Group B rally car. Southgate was employed as chief designer or technical director for many Formula One teams for over twenty years. These teams included BRM, Shadow and Arrows. Southgate retired after producing the Audi R8C, which was a major influence in the Bentley Speed 8, which won Le Mans in 2003. He continues to be a regular visitor to current and historic race meetings.
The Ascari A410 was a Le Mans Prototype built by Ascari Cars in 2000. The car, which was based on the Lola T92/10 Group C racing car, featured a 4-litre Judd GV4 V10 engine, and was used in European and international sports car racing events. In 2002, it was renamed as the Ascari KZR-1.
The Allard J2X-C, or the Allard J2X as it is sometimes referred to, was a Group C sports racing car built by Allard in 1992 for use in international sports car racing events. It featured a 3.5-litre Cosworth DFR V8 engine, capable of producing around 580 hp. The J2X-C had bodywork that is more reminiscent of modern Le Mans Prototypes than a conventional Group C car, but the engine proved too weak for the level of downforce, and this, coupled with the fact that Allard Holdings were liquidated during the car's development, severely restricted the J2X and prevented it ever reaching its potential. One car was built.
The Alfa Romeo SE 048SP was a Group C racing car built by Alfa Romeo in the early 1990s. Designed to replace the Lancia LC2 after the Group C regulations had undergone a major revamp, the SE 048SP had an Abarth-developed chassis mated to the 3.5-litre V10 engine from the stillborn Alfa Romeo 164 Procar, but, although at least one SE 048SP was built, it never left the development phase. The V10 engine appears to have been replaced by a Ferrari-sourced 3.5-litre V12 engine at some point during its development, although this was never officially confirmed by Alfa Romeo.
The Peugeot V10 engine is a series of naturally-aspirated, V10, racing engines; produced between 1990 and 2000. These engines were used to compete in the World Sportscar Championship, between 1990 and 1993, with Peugeot winning the 24 Hours of Le Mans two years in a row. In 1994, they decided to make the switch to Formula One, using the same 3.5 L V10 derived from their highly successful, Le Mans-winning 905 Group C sports prototype, that was easily adjusted to F1 regulations. Peugeot debuted as an engine supplier with the McLaren team and remained in F1 until the end of the 2000 season.
The Alfa Romeo Tipo 1035 is a naturally-aspirated, 3.5-liter, V10 racing engine, designed and built by Alfa Romeo. It was originally specially designed for the Ligier Formula One team, but was later used in the experimental Alfa Romeo 164 Procar touring car, and the Alfa Romeo SE 048SP Group C sports prototype race car.
The Toyota R32V and R36V engine family are a series of turbocharged, 3.2-liter and 3.6-liter, 90-degree, four-stroke, V-8, gasoline racing engines, designed, developed and produced by Toyota for sports car racing; between 1988 and 1999. The engines were used in various Toyota sports prototype race cars.
The BRM P167 is a purpose-built sports prototype race car, designed, developed and built by British Racing Motors to Group 7 racing specifications, specifically to compete in the Can-Am racing series, between 1971. It was BRM's final Can-Am race car chassis. It was powered by a naturally aspirated, Chevrolet big-block engine, developing a solid 600 hp (450 kW).
The Toyota 89C-V is a Group C sports prototype racing car, developed and built by Toyota intended to participate in the World Sportscar Championship, the 24 Hours of Le Mans, and the All-Japan Japanese Sports-Prototype Championship. The chassis is designed by Japanese company Dome. It is powered by a turbocharged 3.2 L (200 cu in) Toyota R32 V8 engine, producing 800 hp (600 kW). It won 2 races, scored 4 podium finishes, and clinched 3 pole positions.
The March 82G is a IMSA GTP/Group C sports prototype race car, designed, developed and built by British manufacturer and constructor March Engineering, for sports car racing, in 1982. It competed in motor racing between 1982 and 1986, but only scored 1 race win, 8 podium finishes, and 2 pole positions. It was powered by a naturally-aspirated 620 hp (460 kW) 5.7 L (350 cu in) Chevrolet V8 engine.
