Since 2012, the company has been assembling the 1.0-liter, three-cylinder Mitsubishi 3A90 engine, which powers the sixth generation of the Mirage and its European variant, the Space Star 2. This power unit can’t handle poor fuel and has a very high compression ratio.
The engines 3A91 and 3A92 are also part of the 3A9 family.
The engine was mounted on:
- Mitsubishi Mirage 6 (A00) since 2012;
- Mitsubishi Space Star 2 (A00) since 2012.
Specifications
| Production years | since 2012 |
| Displacement, cc | 999 |
| Fuel system | distributed injection |
| Power output, hp | 71 |
| Torque output, Nm | 88 |
| Cylinder block | aluminum R3 |
| Block head | aluminum 12v |
| Cylinder bore, mm | 75 |
| Piston stroke, mm | 75.4 |
| Compression ratio | 11.5 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | MIVEC |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 3.2 |
| Fuel type | petrol |
| Euro standards | EURO 5/6 |
| Fuel consumption, L/100 km (for Mitsubishi Mirage 2016) — city — highway — combined |
4.6 3.6 4.0 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 90 |
Disadvantages of the Mitsubishi 3A90 engine
This motor is vulnerable to detonation from poor fuel due to its high compression ratio;
Oil consumption is visible and thin oil scraper rings are located approximately 100,000 kilometers away;
The timing chain typically shifts closer to 150,000 km, frequently in tandem with the phase regulator;
A short-lived thermostat and an erratic electric throttle are among its weaknesses;
This area lacks hydraulic lifters, and valve clearances must be changed on a regular basis.