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Alfa Romeo 121

Alfa Romeo 121

The Alfa Romeo 121 was an eight-cylinder, air-cooled, inverted V engine for aircraft use produced in Italy. It was typically rated at 280 kW (380 hp).

Ambrosini S.7

Type: Eight-cylinder inverted V-8 air-cooled engine
Bore: 120 mm (4.72 in)
Stroke: 110 mm (4.33 in)
Displacement: 9.9952 L (609.9 in³)
Length: 1,780 mm (70 in)
Width: 684 mm (26.9 in)
Height: 700 mm (27.5 in)
Dry weight: 345 kg (760 lb)
Supercharger: Centrifugal type
Fuel system: Two horizontal carburettors, or one injection carburettor
Fuel type: 100/130 grade fuel
Oil system: Pressure type.One pressure and three scavenge pumps
Cooling system: Air cooling
Reduction gear: Spur gear type: reduction ratio 0.621:1
Power output: 284 kW (400 hp) at 3,000 rpm (take-off), 246kW (330 hp) at 3,000 rpm (max continuous power)
Compression ratio: 6.5:1
Specific fuel consumption: 290 g/hp/hr (0.63 lb/hp/hr) (take-off),
Oil consumption: 2.5 kg/hr (5.5 lb/hr)
Power-to-weight ratio: 0.82 kg/kW (0.53 hp/lb)



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