The Doble steam car was an American steam car maker from 1909 to 1931. Its latter models of steam car, with fast-firing boiler and electric start,
were considered the pinnacle of steam car development. The term "Doble steam car" comprises any of several makes of steam-powered automobile in the early 20th century, including Doble Detroit, Doble Steam Car, and Doble Automobile, severally called a "Doble" because of their founding by Abner Doble.
1924 Doble Model E at the Henry Ford Museum
A steam car is a car (automobile) propelled by a steam engine. A steam engine is an external combustion engine (ECE), whereas the gasoline and diesel engines that eventually became standard are internal combustion engines (ICE). ECEs have a lower thermal efficiency, but carbon monoxide production is more readily regulated.
White steam touring car (1909)
Stanley Steamer (1912)
Boiler in a 1924 Stanley Steamer Series 740, to the right is the condenser
Bollée L'Obéissante steam bus photographed in 1875