Mitsubishi Neptune engine
The Mitsubishi Neptune or 4G4 engine is a series of iron-block OHV inline-four engines built by Mitsubishi Motors from June 1971 to 1981. This was to be Mitsubishi's last OHV engine. The inability to clear new passenger car emissions rules for 1978 meant that the Neptunes were replaced by the 4G1 Orion. The Neptune continued to be built until 1979 for commercial vehicles, which suffered less restrictive environmental regulations and until about 1981 for other applications. Around 520,000 Neptune engines were built.
4G41
Displacement —Bore x Stroke —
Power — at 6,000 rpm
Torque — at 4,000 rpm
Applications
- Mitsubishi Galant
- 1971-1973 Mitsubishi Galant FTO
- 1971.10-1979.06 Mitsubishi Delica 75/1400
- Mitsubishi Forklift FG14, FG15
4G42
Displacement —Bore x Stroke —
Power — SAE at 6,000 rpm
Torque — at 4,000 rpm
Applications
- 1973.02-1975.10 Mitsubishi Lancer A71A
- 1973.09-1976.10 Mitsubishi Lancer Van A71V