| Industry: | Automotive |
| Fate: | Bought by Van Diemen |
| Foundation: | 1971 |
| Founder: | Mike Warner Dave Baldwin Derek Wild Gordon Huckle |
| Defunct: | 1975 |
| Location City: | Griston, Norfolk |
| Location Country: | England |
Group Racing Developments, known more simply as GRD, was a short-lived British constructor of racing cars. It was formed in 1971 with a large percentage of staff coming from those made redundant from the closure of Lotus Cars customer car manufacturing arm. They built cars for Formula 2, Formula 3, Formula Atlantic and Sports 2000 racing classes until a decline in British racing vehicle manufacturing bit into the industry in 1975 that paralleled the oil crisis.[1]
| Year | Model | Racing series | Note | |
|---|---|---|---|---|
| 1972 | GRD 272 | |||
| GRD 372 | Roger Williamson won the Forward Trust BARC F3 and the Shellsport National F3 British F3 championships | |||
| GRD S72 | World Championship for Makes S1.6 | |||
| 1973 | GRD 273 | |||
| GRD 373 | Gunnar Nordström finished fourth in the Monaco F3 Grand Prix | |||
| GRD S73 | World Championship for Makes S2.5 | |||
| 1974 | GRD 274 | |||
| GRD 374 | ||||
| GRD S74 | World Championship for Makes S2.5 | |||
| Rowspan=2 | 1975 | GRD 375 | Renzo Zorzi won the 1975 Monaco F3 Grand Prix | |
| GRD S75 | World Championship for Makes S1.6 |