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Continental O-240
Rolls-Royce O-240


Continental IO-240B


The Continental O-240 engine is a four-cylinder, horizontally opposed, air-cooled aircraft engine that was developed in the late 1960s for use in light aircraft. The 130 hp (97 kW) O-240 was a new engine design derived from the six-cylinder Continental O-360 and introduced in 1971. It is generally similar in overall dimensions to the Continental O-200, but with a higher 8.5:1 compression ratio, designed to run on 100/130 avgas. The O-240 delivers 30% more power than the O-200 while it weighs only 12% more. It may be mounted in tractor or pusher configuration. The first O-240 was certified on 7 July 1971.


The O-240 was produced under license in the United Kingdom by Rolls-Royce Limited and was used to power the Reims Aviation-built Cessna 150s constructed in France under license. Rolls-Royce acquired the rights to the O-240, but not the IO-240 in 1977.


The fuel-injected IO-240-A and -B were introduced in 1993. The A and B versions differ only in the type of fuel injector used.


The engine was not selected to power any production North American-manufactured aircraft until the Liberty XL-2 entered production in 2006 powered by the IOF-240-B. The IOF-240 is similar to the IO-240-B except that it employs an Aerosance FADEC system to control the ignition and fuel injection systems.



Dual ignition, 130 hp (97 kW) at 2800 rpm, dry weight 246 lb (112 kg) including starter and generator. Uses a Marvel-Schebler MA-3SPA IO 5067 carburetor. Certified 7 July 1971


Dual ignition, 125 hp (93 kW) at 2800 rpm, dry weight 246 lb (112 kg), uses a TCM 639231A27 fuel injector


Dual ignition, 125 hp (93 kW) at 2800 rpm, dry weight 246 lb (112 kg), uses a TCM 639231A34 fuel injector


Aerosance FADEC system controls the ignition and fuel injection systems, 125 hp (93 kW) at 2800 rpm, dry weight 255 lb (116 kg)

Reims Cessna FRA150 ("A" meaning Aerobat)
Rutan Voyager (front engine)
Practavia Sprite (microlight)
Rollason Condor(D62C)

Diamond DA20-C1
Eagle Aircraft 150B
Rans S-16 Shekari
Roko Aero NG4

Issoire APM 40 Simba
Liberty XL2



Type: "4-cylinder, air-cooled, naturally aspirated, horizontally opposed, fuel-injected, spark ignition, four-stroke, direct drive. The engine incorporates a full authority digital electronic control (FADEC) system to control the ignition and fuel injection functions."
Bore: 4.438 in (112.7 mm)
Stroke: 3.875 in (98.4 mm)
Displacement: 240 in³ (3.93 L)
Height: 24.0" / 60.96 cm
Width: 31.4" / 79.76 cm
Length: 29.1" / 73.91 cm
Dry weight: 255 lb (116 kg)
Installed Runnable Dry Weight: 328 lbs / 148.8 Kg
Oil Sump Capacity: 6 US Quarts / 5.67 L
Valvetrain: One intake and one exhaust valve per cylinder
Fuel system: Aerosance FADEC system
Fuel type: 100LL avgas
Cooling system: Air-cooled
Power output: 125 hp (93 kW) at 2,800 rpm
Specific power: 0.52 hp/in³ (23.66 kW/L)
Compression ratio: 8.5:1
Power-to-weight ratio: 0.49 hp/lb (0.80 kW/kg)




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