The Massey-Harris Model 20 was a two-plow tractor built by Massey-Harris (later Massey Ferguson) from 1946-1948. Introduced to commemorate Massey's 100th anniversary in 1947, the 20 was virtually identical to the earlier Model 81, which first appeared in 1941. About 8,000 Model 20s were sold, in row crop or standard models, with the choice of gasoline or kerosene (known as Tractor Vaporizing Oil, TVO, in Britain) as fuel. The Model 20 was replaced in 1948 by the Model 22.