Technical specifications
| Manufacturer | FIAT, Turin, Italy, from 1956 to 1957 |
| Type | 103 |
| Description | inline 4-cylinder engine, cylinder block made of cast iron with 3 main bearings, aluminium alloy head |
| Stroke | 75 mm |
| Bore | 68 mm |
| Displacement | 1089 cm³ |
| Compression ratio | 8.0 |
| Power | 53 hp at 5400 rpm |
| Torque | 71 Nm at 3600 rpm |
| Specific power | 48.7 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 twin-barrel gasoline Weber carburetor DCD 28/36 |
| Ignition system | with one spark plug per cylinder fed by an inductive discharge system with a high-voltage Magneti Marelli distributor |
| Cooling system | liquid-fed by a centrifugal pump |
| Lubrication system | forced by a gear pump, with an oil cooler |
