Formula Junior
 A Formula Junior car powered by a DKW engine | |
| Category | Single-seater |
|---|---|
| Country | International |
| Region | Europe, North America, Australasia |
| Inaugural season | 1958 |
| Folded | 1963 |
| Constructors | Italy: Stanguellini, Taraschi, Osca, Dagrada UK: Lotus, Cooper, Brabham, Lola, Elva Others: Melkus (GDR), De Sanctis, Gemini, Elfin (AUS) |
| Engine suppliers | Fiat 1100/1200, Lancia, Ford Kent 105E, BMC A-Series, DKW, Saab |
| Tyre suppliers | Dunlop, Continental |
Formula Junior (FJ) is an historic open-wheel racing category which served as an international entry-level class between 1958 and 1963. The formula was conceived by Italian Count Giovanni Lurani to provide an affordable entry point for young drivers into single-seater racing, utilizing mechanical components derived from volume-production road cars.
It effectively bridged the gap between karting and Formula One, serving as a crucial talent incubator for future World Champions including Jim Clark, John Surtees, Denny Hulme, and Jochen Rindt. Rather than entirely replacing the existing 500cc Formula 3 class (which utilized motorcycle engines), Formula Junior co-existed with it for several years before the FIA restructured the junior single-seater ladder in 1964. During its six-year lifespan, Formula Junior facilitated the rapid transition of race car design from traditional front-engined spaceframes to rear-engined monocoque and spaceframe hybrids.
The category was discontinued at the end of the 1963 season, with the governing body, the FIA, replacing it with revived Formula Two and Formula Three categories for 1964. Today, Formula Junior remains one of the most popular categories in historic motorsport, governed by the FIA Lurani Trophy.