The Mitsubishi Neptune or 4G4 engine is a series of
iron
Iron () is a chemical element with symbol Fe (from la, ferrum) 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, right in f ...
-block
OHV
An overhead valve (OHV) engine, sometimes called a ''pushrod engine'', is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located bel ...
inline-four
A straight-four engine (also called an inline-four) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft.
The vast majority of automotive four-cylinder engines use a straight-four layout (with the e ...
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 ...
built by
Mitsubishi Motors
is a Japanese multinational automobile manufacturer headquartered in Minato, Tokyo, Japan.Orion'', ''
Saturn
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; h ...
'', ''
Astron Astron may refer to:
* Mitsubishi Astron engine
* ASTRON, the Dutch foundation for astronomy research, operating the Westerbork Synthesis Radio Telescope and LOFAR
* Astron (comics), a fictional character, a member of the Marvel Comics group The Et ...
'', and ''
Sirius
Sirius is the list of brightest stars, brightest star in the night sky. Its name is derived from the Ancient Greek language, Greek word , or , meaning 'glowing' or 'scorching'. The star is designated α Canis Majoris, Latinisation ...
''. 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.
4G41
''Displacement'' —
''Bore x Stroke'' —
''Power'' — at 6,000 rpm (Galant FTO)
:::: at 2,700 rpm in a 1972 FG15 forklift
''Torque'' — at 4,000 rpm
:::: at 2,000 rpm in a 1972 FG15 forklift
Applications
*
Mitsubishi Galant
The Mitsubishi Galant 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 ...
* 1971-1973
Mitsubishi Galant FTO
The Mitsubishi Galant Coupé FTO is a rear-wheel drive coupe produced by Japanese automaker Mitsubishi Motors from November 1971 to March 1975. "FTO" was meant to stand for ''Fresco Turismo Omologato'', in a fine example of Japanese Italian. The c ...
''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 produced by the Japanese manufacturer Mitsubishi Motors since 1973.
The Lancer has been marketed as the Colt Lancer, Dodge Colt, Plymouth Colt, Chrysler Valiant Lancer, Chrysler Lancer, Eagle Summit, Hin ...
List of Mitsubishi engines This is a list of engines produced by Mitsubishi Motors since 1964, and its predecessors prior to this.
Explanation of codes
The Mitsubishi zaibatsu had been broken up into three companies by the US occupying forces. Automobile and truck engines we ...
References
{{DEFAULTSORT:Mitsubishi Neptune Engine
Neptune
Neptune is the eighth planet from the Sun and the farthest known planet in the Solar System. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times ...