26 years (1956-1982)
Many different engines, but the Marathon stayed the same.
Volkswagen Type 1
65 years (1938-2003)
The Beetle was built in Germany from 1938 through 1980, which would have put it in second place on our list, behind the Mini but just in front of the 2CV. However, production in Brazil (1950-1996) and Mexico (1955-2003) gives the little Ferdinand Porsche-designed ass-engine…