March 731
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| Category | Formula One | ||||||||||
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| Constructor | March Engineering | ||||||||||
| Designer | Robin Herd | ||||||||||
| Predecessor | March 721 | ||||||||||
| Successor | March 741 | ||||||||||
| Technical specifications | |||||||||||
| Chassis | Aluminium monocoque | ||||||||||
| Axle track | 1,448 mm (57.0 in) (Front) 1,448 mm (57.0 in) (Rear) | ||||||||||
| Wheelbase | 2,438 mm (96.0 in) | ||||||||||
| Engine | Ford-Cosworth DFV 2,993 cc (182.6 cu in) 90° V8 naturally aspirated mid-mounted | ||||||||||
| Transmission | 1976: Hewland DG 400 6-speed manual. 1977: Hewland FGA 400 6-speed manual. | ||||||||||
| Weight | 1,270 lb (580 kg) | ||||||||||
| Tyres | Goodyear Firestone | ||||||||||
| Competition history | |||||||||||
| Notable entrants | March Engineering | ||||||||||
| Debut | 1973 Spanish Grand Prix[2] | ||||||||||
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| Constructors' Championships | 0 | ||||||||||
| Drivers' Championships | 0 | ||||||||||
The March 731 was a Formula One racing car designed by Robin Herd of March Engineering for the 1973 season which saw continued use through 1974. While unsuccessful in the hands of the works team, private entrant Hesketh Racing had some success with James Hunt driving.
March had expended much time and effort in developing the previous season's 721 model, and so for 1973 they modified the existing 721G models, moving the radiator to the front and revising the bodywork.[3]
