Technical specifications
| Manufacturer | Officine Meccaniche (OM), Brescia, Italy, from 1957 to 1972 |
| Type | CO2D - 10 |
| Description | inline 4-cylinder engine, head and cylinder block made of cast iron, with 5 main bearings |
| Stroke | 120 mm |
| Bore | 108 mm |
| Displacement | 4397 cm³ |
| Compression ratio | 16 |
| Power | 85 hp at 2400 giri/minuto |
| Torque | 258 Nm at 1200 rpm |
| Specific power | 19.3 hp/litre |
| Valvetrain system | 2 overhead valves per cylinder, operated by pushrods and rocker arms drived by a camshaft housed in the crankcase |
| Fuel feeding system | with a prechamber indirect injection system, supplied by a 4-piston reciprocating Diesel fuel pump, manufactured by FIAT under Bosch license |
| Cooling system | liquid-fed by a centrifugal pump |
| Lubrication system | forced by a gear pump |
