Isotta-Fraschini was established as Fabbrica Automobili Isotta-Fraschini as a builder of high-quality automobiles. They produced their first aircraft engine in 1910. These first engines were water-cooled in-line four-cylinder engines.
During World War I, Isotta-Fraschini produced mostly 6-cylinder engines although the V.5 of 1915 was an in-line 8.

Between wars, Isotta-Fraschini developed many different engines so that by World War II they had a large number of engine types all made in small numbers.

Unable to make the switch from military to civilian production after World War II, Isotta-Fraschini was liquidated.

The Isotta-Fraschini name was resurrected by Breda in 1955.

The V.4 of 1916 was a fairly typical Isotta-Fraschini aircraft engine of the period. An in-line engine (the "V" denoted "Volo" or "flight"), the six cylinders were cast-iron made in pairs.

models

• V.4B: 150 hp (112 kW)

specifications

• Six-cylinder, water-cooled, in-line piston engine
• Displacement: 874 cubic inches (14.3 litres)

used by

• Caproni Ca.36