The Mitsubishi Neptune or 4G4 engine is a series of
iron
Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...
-block
OHV inline-four
A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft.
The majority of automotive four-cylinder engines use a straight-four layout ( ...
engines
An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy.
Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power gen ...
built by
Mitsubishi Motors
is a Japanese Multinational corporation, multinational Automotive industry, automobile manufacturer headquartered in Minato, Tokyo, Japan. 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 (single carb)
:::: at 6,300 rpm (Galant FTO, twin carb)
:::: at 2,700 rpm in a 1972 FG15 forklift
:::: at 2,000 rpm in a 1972 FG15 forklift[
]
Applications
*Mitsubishi Galant
The is an automobile which was produced by Japanese manufacturer Mitsubishi from 1969 until 2012. The model name was derived from the French word ''galant'', meaning "chivalrous". There have been nine distinct generations with total cumulative ...
* 1971-1973 Mitsubishi Galant FTO
* 1971.10-1979.06 Mitsubishi Delica 75/1400
4G42
''Displacement'' —
''Bore x Stroke'' —
''Power'' — SAE at 6,000 rpm
''Torque'' — at 4,000 rpm
Applications
* 1973.02-1975.10 Mitsubishi Lancer
The Mitsubishi Lancer is an automobile that was produced by the Japanese manufacturer Mitsubishi Motors from 1973 until 2024.
The Lancer has been marketed as the Colt Lancer, Dodge Colt, Plymouth Colt, Chrysler Valiant Lancer, Chrysler Lancer, ...
A71A[
* 1973.09-1976.10 Mitsubishi Lancer Van A71V
]
See also
* List of Mitsubishi engines
References
{{DEFAULTSORT:Mitsubishi Neptune Engine
Neptune
Neptune is the eighth and farthest known planet from the Sun. It is the List of Solar System objects by size, fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 t ...
Straight-four engines
Gasoline engines by model