BMW Isetta 600
Everybody knows about the Isetta, a tiny, two-seater Kei car BMW produced in the ‘50s. It was the base model that helped them survive the harsh post-war years. But, during the Isetta production run, BMW introduced a bigger, more spacious version they named the Isetta 600. It had three doors, two on the side and one in front.
Also, it had a bigger 600 cc engine and more space. However, it was more expensive than the standard Isetta, so it was not as successful as a smaller model. BMW produced the Isetta 600 for just two and a half years, so today, it is almost forgotten.