BMW 3/20 PS AM 1-4 two-seater open-top

The most athletic version was the two-seater, already exuberantly also referred to as a "roadster" by the copywriter in promotional literature. This was the most favourably priced entry-level model and offered two passengers adequate space in two comfortable seats. A simple folding hood provided protection against bad weather and insertable Cellon side windows could be used as necessary. The trunk accessible from behind was not simply useful for luggage but also provided space for two additional passengers if necessary, however there was no protection against wind or weather. Although this design was popularly referred to as a "mother-in-law seat", in practice it really only provided enough space for two children at most.