In 1939 an upgraded version was launched badged as the Humber Imperial, but postwar the car reverted to the Pullman name.

The Pullman / Imperial was not offered for sale to the public during the Second World War; the factory's limited output were used as staff cars.

The 1930 car came with a 3498cc straight six cylinder overhead inlet side exhaust valve engine and a claimed power output of 80 hp (60 kW).

The classic limousine style body featured rear- hinged doors and in some respects resembled the Humber Snipe 80 with which it shared its engine, but the Pullman was longer and wider.

[1] Humber, the manufacturer lost its independence in 1931 when the Rootes Group acquired a majority share holding in it.

As well as the factory body options, some cars were supplied in chassis form to independent coachbuilders, especially Thrupp & Maberly.

At 212 in (5,385 mm)[2] the Mk III Humber Pullman was the same length as the Rolls-Royce Silver Cloud which would emerge from Crewe in 1955.