March Engineering
March 731
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.
Text from Wikipedia (CC BY-SA 4.0).
Predecessor: March 721 · Successor: March 741
All March Engineering 731 data: UK builds, safety, recalls, model years →
Design history
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.
Racing history
The works' 731 was primarily raced by Jean-Pierre Jarier without much success, and various private teams fared little better, with the notable exception of Hesketh Racing. Their car, driven by James Hunt in his first season in F1, had various modifications carried out by designer Harvey Postlethwaite, who had been recruited from March by Hesketh. Hunt finished third in the Dutch Grand Prix and second in the United States Grand Prix, and with two other finishes in the points ended up in eighth place in the World Championship. Hunt's success contributed entirely to March's fifth place in the 1973 Constructors' Championship. Roger Williamson, driving for the works team, was killed when his 731 overturned and caught fire at the Dutch Grand Prix.
Sections adapted from Wikipedia (CC BY-SA 4.0); text is shortened. Read the full article for the complete history and citations.
More photos
Sources
- Wikidata — https://www.wikidata.org/wiki/Q10325198CC0 1.0 · retrieved 2026-10-01
- Wikipedia — https://en.wikipedia.org/wiki/March_731CC BY-SA 4.0 · Text © Wikipedia contributors; revision 1370969292 · retrieved 2026-10-01
- Wikimedia Commons — https://commons.wikimedia.org/wiki/File:March_731_front_Donington_Grand_Prix_Collection.jpgCC BY-SA 3.0 · Photo: Morio · retrieved 2026-10-01
- Car Model Index — https://models.autoculturesociety.com/Compiled record. Sources that do not permit reuse are not copied; this index is credited instead.