Mitsubishi 4A91 Engine Specifications
Basic Specifications
- Engine Code: 4A91
- Engine Type: Inline 4-cylinder, DOHC 16-valve, MIVEC (Mitsubishi Innovative Valve timing Electronic Control), naturally aspirated gasoline engine
- Displacement: 1,499 cc (1.5 L)
- Bore x Stroke: 75.0 mm * 84.8 mm (2.95 in * 3.34 in)
- Bore Pitch: 83.0 mm
- Compression Ratio: 10.5:1
- Firing Order: 1-3-4-2
- Engine Configuration: Front-engine, transverse-mounted (for FWD vehicles)
- Production Years: 2004 – present
- Cylinder Block Material: Aluminum alloy
- Cylinder Head Material: Aluminum alloy
- Valve Train: DOHC, 4 valves per cylinder, timing chain drive
- Aspiration: Naturally aspirated
- Fuel System: Multi-point fuel injection (ECI multiple)
- Cooling System: Liquid-cooled
Performance Data
- Max. Power Output:
- 81 kW (109 hp / 111 PS) @ 6,000 rpm
- Max. Torque:
- 145 N·m (107 lb·ft) @ 4,000 rpm
- Redline: 6,500 rpm (fuel cut-off above)
- Idle Speed: 700–750 rpm (ECU controlled)
Lubrication & Maintenance
- Engine Oil Capacity: Approx. 3.0–3.5 L (with filter change)
- Recommended Oil: 0W-20, 5W-30 (Mitsubishi Diamond Genuine Oil)
- Oil Pressure: 2.9–6.9 bar @ 3,500 rpm
- Compression Pressure: 11.0–15.5 bar
Emissions & Fuel
- Fuel Requirement: Unleaded gasoline (RON 92 or higher)
- Emission Standard: Euro 4 compliant
Dimensions (Approx.)
- Length: 600–630 mm
- Width: 580 mm
- Height: 650 mm
Typical Applications
- Mitsubishi Colt (2004–2012)
- Mitsubishi Lancer (2007–2015)
- Smart Forfour (2004–2006)
- Soueast V3, Brilliance FSV, Haima 2, Senova D20 (Chinese market models)