Mitsubishi Orion engine

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Mitsubishi Orion engine
Overview
Manufacturer	Mitsubishi Motors
Also called	4G1
Production	1977–present
Layout
Configuration	Straight-4
Displacement	1.2–1.6 L (1,244–1,584 cc)
Cylinder bore	68.2 mm (2.69 in) 69.5 mm (2.74 in) 71 mm (2.8 in) 72.2 mm (2.84 in) 74 mm (2.91 in) 75.5 mm (2.97 in) 76 mm (2.99 in)
Piston stroke	82 mm (3.23 in) 87.3 mm (3.44 in)
Cylinder block material	Cast iron
Valvetrain	OHV 2 valves x cyl. SOHC 2 or 3 valves x cyl. DOHC 4 valves x cyl. with MIVEC or without
Compression ratio	9.4:1
Combustion
Turbocharger	TC06 (on 4G12T only)
Fuel system	Carburetor Multi-port fuel injection Direct injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	73–197 hp (54–147 kW)
Torque output	10.9–15.3 kg⋅m (107–150 N⋅m; 79–111 lb⋅ft)
Chronology
Predecessor	Neptune engine

The Mitsubishi Orion or 4G1 engine is a series of inline-four internal combustion engines introduced by Mitsubishi Motors in around 1977, along with the Astron, Sirius, and Saturn. It was first introduced in the Colt and Colt-derived models in 1978. Displacement ranges from 1.2 to 1.6 L (1,244 to 1,584 cc).