The FIAT 634N (Nafta [diesel]) is the military variant of the civilian FIAT 632 heavy truck manufactured by Italian manufacturer FIAT from 1931 to 1939.[1][2]
It was used by the Regio Esercito units to transport troops or supplies.
The 634N was initially launched with the Fiat 355 engine, a 6-cylinder 8.3-litre (8312 cc) diesel engine producing 75 hp (56 kW). In 1933, the engine was upgraded to the Fiat 355C unit, a slightly larger 8.4-litre (8355 cc) engine producing 80 hp (60 kW).