The Model T was the first automobile mass produced on assembly lines with completely interchangeable parts, marketed to the middle class. The Ford Model T car was designed by Childe Harold Wills and two Hungarian immigrants, Joseph A. Galamb and Eugene Farkas. Henry Love, C. J. Smith, Gus Degner and Peter E. Martin were also part of the team. While production of the Model T began in the autumn of 1908, model years range from 1909 to 1927. The Model T had a 177-cubic-inch front mounted inline four-cylinder en bloc engine (that is, all four in one block, as common now, rather than in individual castings, as common then) producing 20 hp for a top speed of 40–45 mph.
The Model T four-cylinder side valve engine was first in the world with a removable head, making service like valve jobs easier. According to Ford Motor Company, the Model T had fuel economy on the order of 13 to 21 mpg. The engine was able to run on petrol, kerosene, or ethanol, although the decreasing cost of petrol and the later introduction of Prohibition made ethanol an unreasonable fuel. There were several cars produced or prototyped by Henry Ford from the founding of the company in 1903 until the Model T came along. Although he started with the Model A, there were not 19 production models; some were