Engine Mitsubishi 4G91

The 1.5-liter Mitsubishi 4G91 gasoline engine was produced only from 1991 to 1996 and was installed on such models as the Lancer, Mirage, Colt and its Malaysian counterpart Proton Satria. This motor existed in two versions: with a carburetor or an injector.

The 4G9 family also includes engines: 4G92, 4G93 and 4G94.

The engine was installed on:

  • Mitsubishi Colt CA in 1991 – 1995;
  • Mitsubishi Lancer CB in 1991 – 1995;
  • Proton Satria in 1994 – 1996.


Production years 1991-1996
Displacement, cc 1496
Fuel system carburetor
Power output, hp 97 (carburetor)
115 (MPI)
Torque output, Nm 126 (carburetor)
135 (MPI)
Cylinder block cast iron R4
Block head aluminum 16v
Cylinder bore, mm 78.4
Piston stroke, mm 77.5
Compression ratio 8.5 (carburetor)
9.5 (MPI)
Features DOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 3.5
Fuel type petrol
Euro standards EURO 1 (carburetor)
EURO 2/3 (MPI)
Fuel consumption, L/100 km (for Mitsubishi Lancer 1993)
— city
— highway
— combined
Engine lifespan, km ~275 000
Weight, kg 135

Disadvantages of the Mitsubishi 4G91 engine

  • Engine modifications equipped with a carburetor are famous for frequent failures in its operation.
  • Also in the engine, hydraulic lifters wear out very quickly and require replacement.
  • If the idle speed regulator fails, the engine starts to stall constantly.
  • About 150,000 km of run, rings usually lie down and a strong oil burn begins.
  • A drop in the level of lubrication in the system here often results in turning the liners.

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