Description:    About the Sd. Kfz 222 All models on the Sd Kfz 221/222 series were based on a Horch/Auto-Union chassis (built by Horch-Werke of the Auto-Union combine) and Eisenwerk Weserhutte was the parent firm of the production contractors. 1936-38 production was on the Ausf (model). A chassis which had a 3.5 liter 75hp engine, and 1939-42 production was on the Ausf B chassis with a 3.8 liter 81hp engine. Production ceased in 1942 but these useful little vehicles remained in service for the duration of the war and the layout and style had some influence on British, French, and Russian light armoured car design from 1940 onwards.