The Alfa Romeo 122 was a 12-cylinder inverted-V aircraft engine produced in 1941 by Alfa Romeo Milano as a licence-built Czechoslovakian Walter Sagitta, featuring a single-speed supercharger. The 122 R.C.38 major production variant had a reduction gearbox, single stage supercharger and rated altitude of 3,800 m (12,500 ft).

Specifications

General characteristics

• Type: 60° 12-cylinder inverted V-12 air-cooled engine
• Bore: 118 mm (4.6 in)
• Stroke: 140 mm (5.5 in)
• Displacement: 18.6 L (1,135.04 cu in)
• Length: 1,790 mm (70.5 in)
• Width: 725 mm (28.5 in)
• Height: 781 mm (30.7 in)

Components

• Supercharger: Centrifugal compressor, diameter 210 mm (8.3 in)
• Cooling system: Air cooling

Performance

• Power output: 368 kW (493 hp) at 3,800 m (12,500 ft)