The BMW 321 is a compact six-cylinder automobile produced by the Bavarian firm between 1938 and 1941.
After 1945, production of the 321 resumed at the Eisenach plant and continued until 1950.
The 321 was introduced at the start of 1939 as a successor to the BMW 320.
It sat on a shortened version of the BMW 326 chassis. The 321 differed from the 320 in its front suspension, its larger tyres, and its styling.
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While the 320 used front suspension derived from the BMW 303, with a high mounted transverse leaf spring and lower control arms, the 321 used the front suspension from the 326, with upper control arms and a low mounted transverse leaf spring.
The 1971 cc straight 6 M78 engine was based on the engine in the BMW 326 with a claimed power output of 45 PS and maximum speed of 115 km/h.
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The four-speed manual gear box was also the one already seen on the 326.
The car was available both as a two-door sedan and as a two-door cabriolet.
In addition, BMW offered a chassis-only option suitable for a coach-built body.