The chassis of the Lancaster was all new and featured independent front suspension using torsion bars and a live rear axle with leaf springs.

A Girling hydro-mechanical braking system was fitted, with the front drums hydraulically operated while those at the rear used rod and cable.

Wire wheels were an option but rarely fitted.

[1] At first, the Lancaster was fitted with a 70 bhp 1991 cc six cylinder engine, carried over from the pre-war 16 hp model but from 1949 this grew to 2309 cc by increasing the cylinder bore from 65 to 70 mm.

The four-door, six light body was made of steel and aluminum panel fitted over a wooden frame and was bought in from Mulliners of Birmingham.