A.54
Type	Piston engine
Manufacturer	Fiat

The Fiat A.54 was a seven-cylinder, air-cooled radial engine developed in Italy in the 1930s as a powerplant for aircraft. Amongst others, it powered the Ambrosini SAI.1 and SAI.2 racing aircraft.

Applications

• Ambrosini SAI.1
• Ambrosini SAI.2
• Caproni Ca.100
• Fiat G.2/4
• Jona J-6
• Nuvoli N.5Cab

Specifications

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General characteristics

• Type: 7-cylinder air-cooled radial
• Bore: 105 mm (4.13 in)
• Stroke: 120 mm (4.72 in)
• Displacement: 7.27 L (443.9 cu in)
• Length: 1,770 mm (69.69 in)
• Width: 734 mm (28.93 in)
• Height: 1,065 mm (41.93 in)
• Dry weight: 150 kg (330.7 lb)

Components

• Valvetrain: One intake and one sodium-cooled exhaust valve per cylinder
• Fuel system: 1 Stromberg carburettor
• Fuel type: 74 octane
• Cooling system: Air-cooled

Performance

• Power output: 140 hp (104 kW) at 2,100 rpm
• Compression ratio: 5.5:1
• Power-to-weight ratio: 0.42 hp/lb (0.7 kW/kg)