Lotus 31

[1] The chassis was a multi-tubular spaceframe, of similar design to the 1962 Lotus 22 Formula Junior.

A 997 cc (60.8 cu in) Ford Cosworth 105E with Single Choke Weber or SU carburettors produced 97 bhp (72 kW) at 8000rpm.

Motor Racing Stables at Brands Hatch ran four cars to graduate students from Lotus Cortinas.

The Jim Russell Racing Driver School ran the cars at Snetterton, later being recognised, as a club, by the RAC.

The Jim Russell School ran five 31s at Brands Hatch BARC Trophy Races in July 1967.