Mitsubishi 4A3 engine
The Mitsubishi 4A3 engine is a range of alloy-headed inline four-cylinder engines from Mitsubishi Motors, introduced in 1993 in the sixth generation of their Mitsubishi Minica kei car. It shares a bore pitch with the 3G8-series three-cylinder engines, but has a considerably shorter stroke so as to stay beneath the 660 cc limit imposed by the Kei class.
A version was made available in 1999 for larger cars, and was subsequently fitted to the Mitsubishi Pistachio, a limited production car based on the kei class Minica, equipped with the company's Automatic Stop-Go system for cutting the engine when idling. So equipped, the Pistachio was able to record fuel economy figures of.4A30
Displacement —
Bore x Stroke —
Fuel type — Unleaded regular gasoline659 cc Electronic carburettor (1993)
- Engine type — Inline 4-cylinder SOHC 16v
- Fuel system — Electro carburettor
- Compression ratio — 10.0:1
- Power — at 7500 rpm
- Torque — at 5500 rpm
659 cc SOHC (1993)
- Engine type — Inline 4-cylinder SOHC 16v
- Fuel system — ECI multiple
- Compression ratio — 10.0:1
- Power — at 7000 rpm
- Torque — at 5000 rpm
659 cc DOHC turbo (1993)
- Engine type — Inline 4-cylinder DOHC 20v
- Fuel system — ECI multiple
- Compression ratio — 8.5:1
- Power — at 7000 rpm
- Torque — at 3500 rpm
4A31
Displacement —
Bore x Stroke —
Fuel type — Unleaded regular gasoline1094 cc SOHC (1999)
- Engine type — Inline 4-cylinder SOHC 16v
- Fuel system — ECI multiple
- Compression ratio — 9.5:1
- Power — at 6000 rpm
- Torque — at 4000 rpm
1094 cc GDI (1999)
- Engine type — Inline 4-cylinder DOHC 16v
- Fuel system — GDI Direct Injection
- Compression ratio — 11.0:1
- Power — at 6000 rpm
- Torque — at 4000 rpm
