The Isetta is Italian-designed microcar built in a number of different countries, including Spain, Belgium, France, Brazil, Germany, and the United Kingdom. Produced in the post-World War II years, a time when cheap short-distance transportation was most needed, it became one of the most successful and influential city cars ever created. Because of its egg shape and bubble-like windows, it became known as a bubble car, a name later given to other similar vehicles, including the AMC Pacer.
The BMW Isetta was in 1955 the world's first mass-production 3-liter car. Its low-friction 1-cylinder engine and low weight gave it a fuel efficiency of 3.3 litres per 100 kilometres.
