Almost as a hobby, in 1977 Guy Duport built a prototype, first-of-its-kind diesel-powered microcar. It was a small car with a plastic body and 2 doors, equipped with a 510cc (about 31 cu. in.) Lombardini diesel engine. According to Duport, that 10HP engine assured 3,500 hours of operation, allowing it to travel potentially more than 62,000 miles.