| Category | Formula One | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor | Ligier | ||||||||
| Designer(s) | Michel Beaujon (Technical Director) Claude Galopin (Chief Designer) Henri Durand (Head of Aerodynamics) | ||||||||
| Predecessor | JS19 | ||||||||
| Successor | JS23 | ||||||||
| Technical specifications[1] | |||||||||
| Chassis | Aluminium monocoque | ||||||||
| Axle track | Front: 1,625 mm (64.0 in) Rear: 1,515 mm (59.6 in) | ||||||||
| Wheelbase | 2,800 mm (110 in) | ||||||||
| Engine | Ford Cosworth DFV 3.0, 2,993 cc (182.6 cu in), 90° V8, NA, mid-engine, longitudinally mounted | ||||||||
| Transmission | Hewland FGB, 5-speed manual | ||||||||
| Weight | 540 kg (1,190 lb) | ||||||||
| Fuel | Elf | ||||||||
| Tyres | Michelin | ||||||||
| Competition history | |||||||||
| Notable entrants | Ligier Gitanes | ||||||||
| Notable drivers |  Jean-Pierre Jarier Raul Boesel | ||||||||
| Debut | 1983 Brazilian Grand Prix | ||||||||
| Last event | 1983 South African Grand Prix | ||||||||
| |||||||||
| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
The Ligier JS21 was a Formula One racing car manufactured and raced by Ligier during the 1983 Formula One season. Powered by a Cosworth V8 engine while the majority of teams used turbo power, the team failed to score any points.