The
Lotus 31 was a racing car produced by
LotusTeam Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport series including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar and sports car racing...
for the new 1-litre Formula 3 introduced in 1964, replacing the expensive
Formula JuniorFormula Junior is a formula racing class first adopted in October 1958 by the CSI . The class was intended to provide an entry level class where you could use inexpensive mechanical components from ordinary automobiles...
. The chassis was a multi-tubular spaceframe, of similar design to the 1962
Lotus 22The Lotus 22 was a racing car built by Lotus cars in 1962 and a total of 77 cars were built. It was developed from the 1962 Lotus 20, with the major differences that it had disk brakes all round, had a top link to the rear suspension, and had a dry sump engine that was canted over to lower the...
Formula Junior. A 997 cc Ford
CosworthCosworth is an automotive engineering company founded in London in 1958, specialising in engines for automobile racing . It supplies a wide range of motorsport series, including the World Rally Championship, World Superbikes and, as of 2010, Formula One...
109E with Single Choke Weber or SU carburettors produced at 8000 rpm. The 31 had little success against the more advanced monocoque cars that dominated in 1964.
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The
Lotus 31 was a racing car produced by
LotusTeam Lotus was the motorsport sister company of English sports car manufacturer Lotus Cars. The team ran cars in many motorsport series including Formula One, Formula Two, Formula Ford, Formula Junior, IndyCar and sports car racing...
for the new 1-litre Formula 3 introduced in 1964, replacing the expensive
Formula JuniorFormula Junior is a formula racing class first adopted in October 1958 by the CSI . The class was intended to provide an entry level class where you could use inexpensive mechanical components from ordinary automobiles...
. The chassis was a multi-tubular spaceframe, of similar design to the 1962
Lotus 22The Lotus 22 was a racing car built by Lotus cars in 1962 and a total of 77 cars were built. It was developed from the 1962 Lotus 20, with the major differences that it had disk brakes all round, had a top link to the rear suspension, and had a dry sump engine that was canted over to lower the...
Formula Junior. A 997 cc Ford
CosworthCosworth is an automotive engineering company founded in London in 1958, specialising in engines for automobile racing . It supplies a wide range of motorsport series, including the World Rally Championship, World Superbikes and, as of 2010, Formula One...
109E with Single Choke Weber or SU carburettors produced at 8000 rpm. The 31 had little success against the more advanced monocoque cars that dominated in 1964. Records show only 12 were built in 1964/65.
In 1966 19 cars were built with the Chassis 22/F3. The relative simplicity and low price of the car made it an ideal training car. Motor Racing Stables at Brands Hatch ran 4 cars to graduate students from
Lotus CortinaThe Lotus-Cortina was a high-performance car, the result of collaboration between Ford and Lotus.-Mk1:The start of the Lotus Cortina story begins around 1961, when the best of Ford and Lotus got together. Colin Chapman had been looking to build his own engines for Lotus for quite some time...
s. Jim Russell ran the cars at Snetterton, later being recognised as a club under the RAC. JRRDS ran 5 31's at Brands Hatch BARC Trophy Races in July 1967.