The 1934 Sunbeam 20 was based on the 1933 Sunbeam 16. It carried over the 16’s 2193cc OHV six (rated at 19hp) and Amal carburettor for 1934, before receiving a 2762cc unit (rated at 20hp) and Zenith carburettor for 1935.
Features included an all synchromesh four speed gearbox, hydraulic brakes and semi-elliptic springs all round. Saloon and coupe body styles were available.
Around 220 were made.