Group Racing Developments, known more simply as GRD, was a short-lived British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 constructor of racing cars

Motorsport

Motorsport or motorsports is the group of sports which primarily involve the use of motorized vehicles, whether for racing or non-racing competition...

. It was formed in 1971 with a large percentage of staff coming from those made redundant from the closure of Lotus Cars

Lotus Cars

Lotus Cars is a British manufacturer of sports and racing cars based at the former site of RAF Hethel, a World War II airfield in Norfolk. The company designs and builds race and production automobiles of light weight and fine handling characteristics...

 customer car manufacturing arm. They built cars for Formula 2, Formula 3, Formula Atlantic

Formula Atlantic

Formula Atlantic is a specification of open wheel racing car developed in the 1970s. It was used in professional racing through the IMSA Atlantic Championship until 2009 and is currently primarily used in amateur racing through Sports Car Club of America Formula Atlantic.-History:The history of...

 and Sports 2000

Sports 2000

Sports 2000 is a restricted-rules class of two-seat, rear-engined, open-cockpit, full-bodied sports-prototype racecar used largely in amateur road racing. Sometimes known as S2000 or S2, the class was developed by John Webb, then of the Brands Hatch racing circuit in England, as an affordable form...

racing classes until a decline in British racing vehicle manufacturing bit into the industry in 1975 that paralleled the oil crisis.