The Wanderer W21 was a middle-class six-cylinder sedan introduced by Auto Union's Wanderer company in 1933. The W21 replaced the Wanderer W17, from which it inherited its ohv engine. The car shared its chassis with the more powerful Wanderer W22, but its engine was smaller.Two years after introduction, in 1935, the car was renamed as the Wanderer W235, and in 1936 it was renamed again as the Wanderer W35. The engine and principal mechanical components remained very little changed throughout, however, as did the wheelbase and other principal chassis measurements. The car therefore was, and generally still is, regarded as a single model despite the name changes.