The 3½ Litre was a car built by Lammas-Graham between 1936 and 1938. Approximately 30 were built.
The 3½ Litre was fitted with a 3671cc six-cylinder engine of side-valve design. The car came with a three-speed gearbox (with synchromesh on the 2nd and 3rd gears) as well as a single-plate clutch. The engine produced 128bhp and the top speed of the car was 94mph (151kmh).
The chassis which was 9ft 8in long came with an anti-roll bar at the front but other than that, it was conventional for it's time. Luvax shock absorbers were added to the front and the rear. Lockheed hydraulic brakes were fitted as well as semi-elliptical leaf-springs all round.
A range of bodywork was on offer from a number of outside coachbuilders including Abnott, Bertelli and Carlton.
The car cost £620 when new in 1937.