The Fiat 25 R was introduced in 1951 as the successor to the successful 600. Its appearance and structure were almost the same as its predecessor. Initially, only a 2.27-liter 23-horsepower gasoline version was available. Electric start with a 24-volt system was now standard equipment. The clutch was still manually operated. In 1953, a diesel model was introduced featuring a completely new 1.9-liter pre-chamber diesel engine, which was also used in the 1400 passenger car and light trucks. As a tractor version, it had 25 hp. A hydraulic lift was also now available.

Over the years, nearly 30 different versions of the 25 were produced, more than half of which were crawler tractors. There were specific models for vineyard, industrial, and forestry use, among others. The four-wheel-drive model shown in the picture was introduced in 1955. More than 30,000 units of the 25 models were sold in Italy alone, with slightly over half being wheeled versions.

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