Designed by Willy Black, the BMW 600 was intended as an enlarged Isetta three-wheeler with more power and a more conventional four-wheel configuration. 

The front end of the 600 was virtually unchanged from the Isetta, but the 600's wheelbase was stretched to accommodate four seats. A conventional rear axle was added. BMW introduced the semi-trailing arm independent suspension on the 600. This suspension would be used on almost every new model for the next four decades. Because of extra size and weight, the 600 had a more powerful engine than the Isetta. The 600 had the 582 cc twin engine from the R67 motorcycle. Top speed was 64 mph.

In two years only 34,000 600's were produced, partly due to price competition with the entry-level VW Beetle. In the late 50's consumers wanted cars that looked like cars, and they had lost interest in economy models. Sales of the 600 were, however, aided by the energy crisis of 1956-57.

The BMW Mobile Tradition CD has every part for the 600 with pictures and BMW part numbers.

The Areocar 600 is a 1959 BMW 600 turned airplane with a handmade propeller turned by a 12 volt electric motor, a tail from a real airplane and tires form a Beech Jet 400A. It even has a custom dash with a working altimeter, airspeed indicator and aircraft compass! Click here for BMW World's review.

The Microcar and Minicar Club home page has links, facts and pictures of lots of small cars. Features the BMW 600.

BMW Dave's Isetta has a 300 and a 600, with lots of info and pictures.

BMW 600 explains the difference between a 600 and an Isetta. Nice cutaway drawing on the main page. 

Isetta Online in German has many facts, some pictures and links to other sites. Has some great detail pictures and unique images.

The Isetta Page has some history, facts, German promotional pictures and links.

Microcar Club in Wales features BMW's like the 600 and other small cars.

Yug's Isetta Page or what I've learned about Isetta's has facts and a story of a rebuild. Has links to great pictures and ads.