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Motore FIAT tipo 305
1953 - 1968



The Diesel engine type 305 was developed by FIAT, in the early '50s, starting from the petrol engine type 105. Initially it was used for the light truck FIAT 615 N and, in 1953, for the FIAT 1400 Diesel, making it the first Diesel engine produced in Italy for passenger cars. From the same year the engine was also used for the light off-road FIAT Campagnola Diesel. The 305 engine was built in various versions with improved performance. This model has been partially sectioned for didactic purposes.

Technical specifications

ManufacturerFIAT, Turin, Italy, from 1955 to 1960
Descriptioninline 4-cylinder engine, head and cylinder block made of cast iron, with 3 main bearings
Stroke90 mm
Bore82 mm
Displacement1901 cm³
Compression ratio20.0
Power43 hp at 3200 giri/minuto
Torque96 Nm at 2000 giri/minuto
Specific power22.6 hp/litre
Valvetrain system2 overhead valves per cylinder, operated by pushrods and rocker arms drived by a camshaft housed in the crankcase
Fuel feeding systemwith a Ricardo Comet prechamber indirect injection system, supplied by a 4-piston reciprocating Diesel fuel pump, manufactured by FIAT under Bosch license
Cooling systemliquid-fed by a centrifugal pump
Lubrication systemforced by a gear pump
Clutchsingle-disc type
Transmissionwith a 4 speed + RM manual gearbox


FIAT 615 N (truck)

FIAT 1400 Diesel  (saloon car)

FIAT Campagnola Diesel  (off-road vehicle)

Testi e immagini di Giuseppe Genchi
Sito realizzato da Pasquale Pillitteri