The Aster 20/55 was a car produced by Aster between 1925 and 1926. Less than 50 cars were made in total.

The cars had a 6 cylinder 2888cc engine with overhead camshafts. They also have a single plate clutch connected to a four speed gearbox. The cars have a top speed of 75mph (121kmh).

The cars have a 10ft 11in chassis with semi-elliptical spring suspension in the front and quarter elliptical suspension in the rear. The cars also feature a Perrot foot brake system on the front wheels and a handbrake operating the rear wheels.

The sports four-seater cost £785 when new.