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.
Specifications
| Production years | 1991-1996 |
| Displacement, cc | 1496 |
| Fuel system | carburetor injector |
| 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 |
9.0 5.5 6.7 |
| 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.
