|Mitsubishi Orion engine|
|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)
|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
|Turbocharger||TC06 (on 4G12T only)|
Multi-port fuel injection
|Power output||73–197 hp (54–147 kW)|
|Torque output||10.9–15.3 kg⋅m (107–150 N⋅m; 79–111 lb⋅ft)|
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).
The 4G11 displaces 1.2 L (1,244 cc) with a bore and stroke of 69.5 mm × 82 mm (2.74 in × 3.23 in).
The 4G12 (also known as the G11B) displaces 1.4 L (1,410 cc) with a bore and stroke of 74 mm × 82 mm (2.91 in × 3.23 in). 4G12 was the first to feature Mitsubishi's MD (modulated displacement) technology, a form of variable displacement which shut off two cylinders during light load and at low speeds. The 4G12 was not offered by Mitsubishi with fuel injection. This engine is fairly outdated compared to its counterparts that were used in the later Lancers.
This is the turbocharged version of the 4G12, uses a TC-04 turbocharger from Mitsubishi Heavy Industries. The diameter of the blades in this charger is rather small, at 49 mm, and it spins at 90,000 rpm to provide 0.53 bar (7.7 psi) of boost. This increased power and torque by about 30 and 25 percent respectively. The Japanese-specification version of this engine produces 105 PS (77 kW) at 5,500 rpm and 15.5 kg⋅m (152 N⋅m; 112 lb⋅ft) of torque at 3,000 rpm.
The SOHC, 12-valve 4G13 displaces 1.3 L (1,298 cc) and produces 75–85 PS (55–63 kW) with a bore and stroke of 71 mm × 82 mm (2.80 in × 3.23 in). In the Gulf Countries, 90 PS (66 kW) gross at 6000 rpm is claimed on the mitsubishi lancer CB1. The 4G13 engine has been produced by Dongan Mitsubishi Motors Engine Manufacturing, in Harbin, China since September 1998.
The SOHC 4G15 displaces 1.5 L (1,468 cc) with a bore and stroke of 75.5 mm × 82 mm (2.97 in × 3.23 in). A version of the 4G15 was produced with gasoline multi-port fuel injection. It has approximately 94 hp (69 kW) on the 1993 Mirage model. The DOHC 4G15 produces 109 hp (81 kW) with 137 N⋅m (101 lb⋅ft) of torque. Another DOHC version was combined with GDI fuel injection and delivers 100 hp (74 kW) and 137 N⋅m (101 lb⋅ft) of torque. A DOHC MIVEC turbo variant of the engine is also still in production to date (4G15T), serving in the Mitsubishi Colt series, offering 165 hp (121 kW) on the latest Colt Version-R (with exhaust enhancement). The most powerful version of this engine is found in the Colt CZT Ralliart (special model in Switzerland) with a total output of 197 hp (147 kW). There was a recorded instance of the engine exceeding 997,000 mi (1,604,516 km) in a 1998 Mitsubishi Mirage sedan.
The 4G15 is known as one of the longest living Japanese engines ever produced where new variants of the engine are still being produced and used in Chinese cars since 2005. The 4G15 engine has been produced by Dongan Mitsubishi Motors Engine Manufacturing in Harbin, China. And also the new engines have been produced by GAC Mitsubishi Motors, a joint venture from the Hunan province in southern China, since April 2017.
This version of the 4G15 is a single overhead camshaft (SOHC) 8-valve, carburetor type engine. It is a in-line four with a compact type combustion chamber. The engine's advertised power was 77 PS (57 kW; 76 hp) (DIN) and 127 N⋅m (94 lb⋅ft) of torque.
The engine is an analogue of the Mitsubishi G15B in terms of the engine mechanical specifications except for the valve timing. The G13B is also equipped with jet valves and jet springs.
Total displacement: 1.5 L (1,468 cc)
Bore x Stroke: 75.5 mm × 82 mm (2.97 in × 3.23 in)
Compression Ratio: 9.4:1
A 12-valve version (two intake and one exhausts per cylinder) of the 1468 cc 4G15 engine. It entered production in 1989, for the third generation Mitsubishi Mirage/Lancer. It was available with a carburettor or fuel injection, producing 85 or 100 PS (63 or 74 kW) in Japanese market trim at the time of introduction. Later, a natural gas-powered version was added and in 1991 a new lean-burn technology called "Mitsubishi Vertical Vortex" (MVV) was introduced on this engine.
The 4G16 displaces 1.2 L (1,198 cc) from a 68.2 mm × 82 mm (2.69 in × 3.23 in) bore and stroke. This engine was mainly offered in European markets, where it suited local tax regulations.
The 4G17 displaces 1.3 L (1,343 cc). It is a SOHC 12-valve engine. Bore and stroke is 72.2 mm × 82 mm (2.84 in × 3.23 in). Output of a carbureted version is 78 PS (57 kW; 77 hp) at 6,000 rpm and 10.9 kg⋅m (107 N⋅m; 79 lb⋅ft) of torque at 3,500 rpm.
The SOHC 4G18 displaces 1.6 L (1,584 cc) with a bore and stroke of 76 mm × 87.3 mm (2.99 in × 3.44 in). It is a 4-valve per cylinder engine, which produses from 98 PS (72 kW) to 110 PS (81 kW) with 150 N⋅m (111 lb⋅ft) (European specifications). It uses a COP (Coil-On-Plug, also known as Plug-top coil) ignition rely on one coil to fire two cylinders, one of which was by spark plug wire. The 4G18 engine has been produced by Dongan Mitsubishi Motors Engine Manufacturing , in Harbin, China since April 2010.
The DOHC MIVEC 4G19 displaces 1.3–litres and features four valves per cylinder. It produces 90 PS (66 kW; 89 hp) at 5,600 rpm and 121 N⋅m (89 lb⋅ft) of torque at 4,250 rpm. It was introduced in 2002, powering the then-new Mitsubishi Colt.