BMW R4
| Production Year: | 1932, 1933, 1934, 1935, 1936, 1937 |  |
| Type: | air-cooled, four-stroke, single vertical cylinder |
| Production Year: | 1932, 1933, 1934, 1935, 1936, 1937 | |
| Type: | air-cooled, four-stroke, single vertical cylinder |
