History & Background:History

The Dodge Ram 50 (called the D50 for 1979 and 1980) was a compact pickup truck produced by Mitsubishi Motors and sold by the Chrysler Corporation from 1979 to 1993. Plymouth also received a version of the truck known as the Arrow Truck, sold from 1979 to 1982. This was Chrysler's belated answer to the Ford Courier from Mazda and the Chevrolet LUV by Isuzu. Mitsubishi itself imported it as the Mitsubishi Mighty Max when it began selling directly in the U.S. from 1982, at which point the Plymouth ceased to be available.
Four wheel drive was added for 1982, creating the Power Ram 50 according to Dodge's nomenclature (the Power Ram name was used for four wheel drive models). A turbodiesel engine was available in US models between 1983 and 1985. The 1983 turbodiesel was fitted with a TC05 non-wastegated turbo and produced 80 hp (60 kW) and 125 lb·ft (169 N·m) torque. The 1984-85 turbodiesels were fitted with a TD04 wastegated turbo which resulted in 86 hp (64 kW) and 134 lb·ft (182 N·m) torque.
The Ram 50 was redesigned in 1987, which was the same year Chrysler introduced the Ram 50's successor, the Dodge Dakota. Despite this, sales of the Ram 50 continued for another seven years, possibly because the Ram 50 was a compact and the Dakota was a mid-size. The difference in size and cost left a niche for the Dodge 50, and its cancellation may have been due more to a desire to show independence from Mitsubishi than because of any product overlap. In 1990 all trucks starting coming with fuel injection, with the 2.4L 4g64 or 3.0L 6g72, with all prior years being carbureted The Mighty Max ended production after the 1996 model year.



Second Generation (1987-1995)
6020868071_8017934527_b.jpg
The Ram 50 and Mighty Max were all new this year (the D50 designation was dropped). The turbodiesel engine was dropped, but the 2.0L and 2.6L I4s remained. The 3-speed automatic was replaced with a 4-speed unit on the 2.6. Extended cabs were offered for the first time (Mitsubishi called their version the "Macro-cab"). Dodge debuted the Dakota pickup this year, but the Ram 50 remained due to its compact size, whereas the Dakota was a mid-size. By now, Chevrolet and Ford's domestic-built compact trucks (the S10 and Ranger) had been out for a few years and no longer relied on captive importing for its compact trucks, but the Dodge Ram 50 remained Mitsubishi-produced.

1988 and 1989 models were pretty much unchanged, but the 1990 models got 2 new power trains; the 2.0L and 2.6L I4s were dropped, a new 2.4L 116hp I4 was now standard and a new 3.0L 142 hp V6 was an option (with 4-speed automatic only). Despite this, the Ram 50 and Mighty Max were now bit players in the compact truck market, not being nearly as popular as the Nissan and Toyota compact trucks, let alone the Chevrolet S10 and Ford Ranger, but they soldiered on nonetheless. 1991 and 1992 models remained unchanged save for some new colors. The Dodge Ram 50 would die at the end of the 1993 model year, but the Mighty Max would survive (temporarily). In 1994, it dropped its extended cab body style and V6 engine; it was now down to one cab and bed size and the I4 engine. Mitsubishi finally threw in the towel on the Mighty Max after 1995.
Neither the Ram 50 or Mighty Max had direct successors, but Dodge would continue with the Dakota, and Mitsubishi would have another pickup model in 2005 called the Raider, which was a fraternal twin to the 3rd generation Dakota.


Engines:
1979-1989 - Carbureted
1990-1996 - Fuel Injected

• 1979–1987 2.0 L 4G52 I4, SOHC, Carburetor, 90-93 hp (67-69 kW)
  
• 1987–1989 2.0 L G63B I4, SOHC, Carburetor, 90-93 hp (67-69 kW)
  
• 1979–1989 2.6 L 4G54 I4, SOHC, Carburetor, 105 hp (78 kW)
  
• 1983–1985 2.3 L 4D55T turbodiesel I4, 80-86 hp (61-64 kW)
  
• 1990–1996 2.4 L 4G64 I4, Fuel Injection, 116 hp (87 kW)
  
• 1990–1996 3.0 L 6G72 V6, Fuel Injection, 142 hp (106 kW)
  

First Generation Dodge Ram D50 1979 - 1983




First Generation Ram D50 1983-1985



Second Generation Ram d50 1985 -1987



Seccond Generation Mighty Max. 1985-1996


Mitsubishi Mighty Max ManufacturerMitsubishi Motors Production1982–1996 (Mighty Max)

1979–1993 (Ram 50)Assembly Nagoya, Aichi, Japan Successor Dodge Dakota (Ram 50)
Mitsubishi Raider (Mighty Max)Class Compact pickup truckBody style 2-door truck/4-door truck
6.5/8 ft bed LayoutFront-engine, rear-wheel drive / four-wheel drive Related Mitsubishi Forte
Mitsubishi L200
Mitsubishi Triton


First generationAlso called Dodge D50 (1979–1980)
Plymouth Arrow Truck (1979–1982)
Dodge Ram 50 (1981–1986)Production1979–1986
Engine2.0 L 4G52 I4, SOHC, 93 hp (69 kW)
2.6 L 4G54 I4, SOHC, 105 hp (78 kW)TransmissionManual
5-speed Mitsubishi KM132



5-speed Mitsubishi KM145Second generationAlso called Dodge Ram 50 (1987–1993)Production1987–1996 (1987–1993 For Ram 50)Engine2.0 L 90 hp I4
2.6 L 109 hp (81 kW) I4
2.4L 116 hp I4
Transmission4-speed automatic
5-speed manualWheelbaseReg. Cab Short Bed: 105.1 in (2,670 mm)
Reg. Cab Long Bed & Extended Cab: 116.1 in (2,949 mm)
Sport: 105.5 in (2,680 mm)LengthReg. Cab Short Bed: 177.2 in (4,501 mm)
Reg. Cab Long Bed & Extended Cab: 193.7 in (4,920 mm)
Ext. Cab: 188.2 in (4,780 mm)Width65.2 in (1,656 mm)
Mighty Max Reg. Cab 4WD: 65.9 in (1,674 mm)
Mighty Max Sport Cab 4WD: 66.4 in (1,687 mm)HeightReg. Cab Short Bed 2WD: 58.5 in (1,486 mm)
1987-88 Reg. Cab Short Bed 2WD: 58.3 in (1,481 mm)
Reg. Cab Long Bed & Extended 2WD: 59.3 in (1,506 mm)
Reg. Cab Short Bed 2WD: 63.4 in (1,610 mm)
1991-93 Reg. Cab Long Bed & Extended 4WD: 64.4 in (1,636 mm)
1991-93 Macrocab 2WD: 59.7 in (1,516 mm)
1987-1990 Macrocab 2WD: 59.6 in (1,514 mm)


New Found Information


I dont claim to have written but a tiny bit of this. All of it is plagurized, but I'll try to link to the sources:

Wikipedia
http://www.wikipedia.org

And some more info is available at Mitsubishi Web Museum http://www.mitsubishi-motors.com/corporate/museum/e/index.html

Its strange to find just how many companies have been intertwined with Mitsu over the years: Chrysler, DSM, GEMA, Hyundai, Mazda, Ford, BMW (Mini), Mercedes Benz, Porsche, Rover.. etc.

Naming
Mitsubishi Motors uses a simple four-digit naming scheme for its automobile engines:

The first digit signifies the number of cylinders
The second is the fuel type; "G" for gasoline, "R" for race fuel?, "D" for Diesel
The third is the engine family
The fourth is the engine model
The first digit is sometimes omitted shifting the entire scheme by one to make room for another character. It is rumored that "T" is for turbocharged and "B" for second-generation.

Families
Mitsubishi has developed five families of straight-4 engines:

4G1x "Orion" - 1.2 L to 1.5 L
4G3x "Saturn" - 1.2 L to 1.8 L
4G5x "Astron" - 2.0 L to 2.6 L "Silent Shaft" <--- G54B
4G6x "Sirius" - 1.6 L to 2.4 L <--- 4G63
4G9x - 1.6 L to 2.0 L

Orion
The Mitsubishi Orion.. cant find much information. Displacement ranges from 1.2 L to 1.5 L.

4G11
The 4G11 displaces 1.2 L (1244 cc).

4G12
The 4G12 displaces 1.4 L (1410 cc).

4G13
The 4G13 displaces 1.3 L (1298 cc). It is an SOHC engine.
Applications:
Mitsubishi Saga
Mitsubishi Iswara
Mitsubishi Wira
Mitsubishi Satria

4G15
The SOHC 4G15 displaces 1.5 L (1468 cc).
Applications:
Mitsubishi Saga
Mitsubishi Iswara
Mitsubishi Wira
Mitsubishi Satria

4G16
The 4G16 displaces 1.2 L (1198 cc).

Saturn
Hard to find much info on anything but the legendary Rally cars using the 1.6L model. Displacement ranges from 1.4 L to 1.8 L.

4G31
Mitsubishi's first OHC Saturn motor. The 4G31 displaces 1.5 L (1499 cc). It is an 8-valve SOHC design
Applications:
Colt Galant AIIGS
colt.jpg
Marketed since December 1969 as an advance personal car, its popular features were high performance and the original 'Dyna-wedge line' styling. The success of the Colt Galant represented an important step forward for Mitsubishi Motors and it was the first of the company's products to be exported to North America. There were three variants -- the A1, A2 and A2GS -- depending on engine specification. The car in the photograph is an AIIGS using Mitsubishi's first OHC Saturn engine, with a maximum speed of 175km/h. There were competition successes for the Colt Galant in both domestic and international rallies, including an overall victory for the 16L-GS in the 7th Southern Cross Rally in 1972.

4G32
The 4G32 displaces 1.6 L (1597 cc). It is an 8-valve SOHC design.
Applications:
Mitsubishi Lancer 1600 GSR
lancer.jpg
First appearing on the market in February 1973, the Lancer bore the slogan, 'respect for humanity.' The range has since expanded to 12 models, with engine capacities between 1200cc and 1600cc, all with a rigid monocoque body, low emission engines, a tilting steering wheel with an emergency collapsible function and power-assisted disc brakes. In August of the same year, seven more models were added, including the fastest of the range, the 1600GSR, which is capable of 0-400m in 16.4 seconds. The photograph shows a production version of the 1600GSR which in 1974 was changed in minor details. The 1600GSR played an important role in international motorsport, winning the Safari Rally overall twice, in 1974 and 1976, and (starting in 1973) taking four consecutive overall wins in the Southern Cross. The rally car shown in the photograph is the 1974 Safari winner (1973 model).

Here is more info on the same car from Glen Edmond's Page: http://www.eastafricansafarirally.com/info_pages/carsale1.htm

Light weight, compact and reliable thanks to its engineering simplicity, the Mitsubishi Lancer cut a swathe through the road-going vehicle market when introduced in February 1973. It's smooth sporting lines signalled superb performance under the skin, and it was on this base that the sporting version, the Lancer 1600 GSR, was based, combining the Lancer's inherent qualities of strength and high performance with the experience gained through seven years of successful competition with the Colt and Galant.

Fondly remembered as the "A73 Lancer", the Lancer 1600 GSR was an immediate success in rallying, taking a remarkable 1-2-3-4 victory in the 8th Southern Cross Rally in October that year. And the victor? One Andrew Cowan, a man who would be part of the Lancer success story for many years to come. But it was during the following year that the Lancer really made its mark on the world stage. While events such as the Southern Cross had a world-wide reputation, a manufacturer couldn't truly claim rally superiority until it had won a World Championship event.

Mitsubishi chose the toughest of all, the Safari Rally, held in Kenya, Africa, in which to launch the Lancer onto the world scene. And what a glorious success it was! Few manufacturers have ever enjoyed such a remarkable feat as Mitsubishi did in 1974 when, on its world debut, the Lancer strode confidently to a maiden victory at the hands of Joginder Singh. It's remarkable to note that the 1600cc Lancer beat Bjorn Waldegaard's Porsche 911 which boasted 2600cc, proving that the light, compact reliable Lancer could beat all-comers. It was a momentous occasion, and one which started a love affair between Mitsubishi and this great classic event.

The Safari Rally enjoys a reputation as an extremely tough event. It ranks as one of the most famous rallies in the world and, at the time of the Mitsubishi Lancer's memorable 1974 victory, the event was the biggest rally in the FIA World Rally Championship, stretching over five days and a gruelling 6,000 km. The Safari was, and is, regarded as a real "car-breaker", a term coined by rally followers for those events one is lucky to finish in one piece, never mind win.

To contest such an event successfully, a driver needed a car that he could rely upon totally, even in the harshest conditions, and combine that resilience and reliability with speed and performance. Clearly, the Mitsubishi Lancer combined those rare qualities with great success. Singh gave the Lancer the most praise when he said: "To win the Safari Rally your machinery must have the best performance and superior handling, as well as strength, ease of maintenance and simple design. I believe I won this race because of the Lancer. This victory will remain a vivid memory throughout my life and the Lancer will surely become a lifelong friend. I was lucky to be able to drive such a reliable machine." Singh went on to repeat that success with a further win with the Lancer on the 1976 Safari Rally, heading a Mitsubishi 1-2-3 and beating the World Championship winning Lancia Stratos in the process.

During this time the Lancer went on to dominate the Southern Cross Rally in Australia, which became the scene of yet another famous driver's debut, that of Kenjiro Shinozuka, Japan's first rallying superstar. Having already enjoyed success on domestic events in Japan,Shinozuka drove his first international event at the wheel of a Lancer on the Southern Cross, where Andrew Cowan was the acknowledged master and went on to win a further three of these great events in a row in the Lancer. By this time the Mitsubishi Lancer was developing a reputation for being invincible at home in Japan and abroad. Indeed, in Africa it had gained the sobriquet "The King of Cars." It seemed that everyone who drove a Lancer prospered from its superior performance, especially over rough and arduous rallies where it undoubtedly excelled.

While Shinozuka's loss of concentration after losing his way on his first Southern Cross Rally resulted in retirement after leaving the road, his first world championship experience on the 24th Safari Rally gave cause for celebration when he won the Best Driver award for finishing sixth overall, joining such luminaries as Hannu Mikkola, Shekhar Mehta and Joginder Singh. By the time Andrew Cowan won the Southern Cross yet again in 1976, the Lancer had clocked up six wins overall and including Cowan's class victory on the 1975 Safari, a grand total of seven major international awards. Lancers also dominated the Bandama Rally in 1977, with Cowan and Singh beating the works Peugeot 504s, but with this event, the endurance era drew to a close.


Major Results:

International
1973 Southern Cross Rally 1st
1974 Safari Rally (WRC) 1st
1974 Southern Cross Rally 1st
1975 Safari Rally (WRC) 4th
1975 Southern Cross Rally 1st
1976 Safari Rally (WRC) 1st
1976 Southern Cross Rally 1st
1977 Southern Cross Rally 4th
1977 Southern Cross Rally 4th
1977 Bandama Rally 1st

The 4G32 has also appeared in this awesome Mitsubishi: The Galant GTO
gto.jpg
Inspired by aircraft shapes and details, the Galant GTO earned widespread recognition as the 'Hip up coupe.' The MI and MII versions went on the market in November 1970 and the MR in December. With features that included a unique long nose and duck tail, together with 50 inch curved side windows, its styling (distinctive for a domestic model) generated overwhelming enthusiasm at the Tokyo Motor Show. The cockpit-type dashboard had a strong influence on design at rival domestic car manufacturers. The GTO shown in the photograph is the MR, the boldest of three available variants. It was fitted with Mitsubishi's first production DOHC engine.

4G33
The 4G33 displaces 1.4 L (1439 cc).

4G36
The 4G36 displaces 1.2 L (1238 cc).

4G37
The 8-valve SOHC 4G37 displaces 1.8 L (1755 cc).
Applications:
Mitsubishi Cordia
Retrieved from http://en.wikipedia.org/wiki/Mitsubishi_Saturn_engine

Astron

The Mitsubishi Astron, our pride and joy. Engine displacement ranges up to 2.6 litre (one of the largest four cylinder engines of its time (?)). It powered models such as the Mitsubishi Pajero/Montero, Mitsubishi Sigma and Mitsubishi Magna, Mitsubishi Starion, Dodge Conquest.

It employs a chain driven single overhead camshaft (SOHC) and has 8 valves (two per cylinder). In 2.6 L (4G54) Astron II EFI guise (used in the TN Magna) it produced 93 kW at 4800 revolutions per minute and 205 N·m at a low 2300 rpm.

In 1975, the Astron featured a modern balance shaft system, dubbed "Silent Shaft". The 2.6 was praised for its smoothness and strong low-end torque, but later in its life its power and (never great) economy was eclipsed by newer (many of them DOHC) engines.

4G52
The 4G52 displaces 2.0 L (1995 cc).
Applications:
1979-1989 Dodge Ram 50

4G54
The SOHC 8-valve 4G54 aka G54B displaces 2.6 L (2555 cc). It was designed for longitudinal use in rear wheel drive and all wheel drive vehicles. (and therefore has the "wide" 13.25" lower bellhousing pattern)
Applications:
1979-1989 Dodge Ram 50
1987-1988 Mazda B2600

4G55
The 4G55 displaces 2.3 L (2346 cc).

Mazda and Mitusbishi (and Ford)
The Mark 5 B2600 Pickup Truck
Production: 1985–1991
A new Proceed/B-Series was introduced in 1985 (1986 in the United States) and was produced until 1991. A 4-speed automatic transmission was the primary choice, with a 5-speed manual transmission through 1989. Part-time four wheel drive was another option.

5/87-5/88
2555cc (2.6L)
VIN Code: E
Chrysler, Mitsubishi, Hyundai, D-50, Montero, B2600, G54B,
RWD, MCA Jet Head, Hydraulic rockers,
13.25" Across Bellhousing Bolts,
ST trans. 1/83-4/86 Stk. 5/86 up AT or Std.

The 2.6L Mitsubishi-powered B2600 was introduced in 1986, though the United States introduction lagged by a year. 1987 saw the Mazda straight-4 enlarged to 2.2 L in the B2200, with the smaller engine phased out after that year. The Mitsubishi engine was gone for 1988 (1989 in the United States), replaced by a new family of Mazda powerplants. The G54B was replaced with the "G6" engine:

8/88-95
2606cc (2.6L)
VIN Code: G6
Ford, Mercury, Mazda, G6 Engine, 8/88-95 MPV, 11/88-93 B2600,
FI, 12 Valve, Balance shaft, Hydraulic lifters, WP.
If '86-88 B2600, see Mitsubishi G54B engine 2610.2.

Mazda pattern: G6
Mitsu pattern: G54B

This information is VERY interesting to us RWD people... and goes deep into Mitsubishi's relationship with Mazda.... and even Ford.

From the first B-Series pickup truck, Mazda has used the engine displacement to determine the name. Thus, the B1500 had a 1.5 liter engine, and the new B4000 has a 4.0 liter V6. For 2002, the name was changed to simply Mazda Truck in the United States. In Japan, Mazda uses the Proceed name on its compact pickup trucks, and another line of larger trucks is available called the Mazda Titan. Other names used for this line include Mazda Bravo (Australia), Mazda Bounty (New Zealand), and Mazda Drifter (South Africa).

Mazda's partnership with Ford has resulted in the sharing of this vehicle—the Mazda B-Series and Ford Ranger are essentially the same. In Australia and New Zealand, since the 1970s, the Ford Courier name is also used and the line continues today.

However, it should be borne in mind that the Mazda B-Series and Ford Ranger twins found inside North America are unrelated to the ones sold elsewhere. These are engineered by Mazda, whereas the North American models are developed by Ford.

The Ranger has used transmissions from both Mazda and Mitsusbishi including the Mitusibishi FM132 and the Mazda Model R
http://www.therangerstation.com/tech_library/ManualTransmission.html

Mazda Model R Transmission
href='http://members.aol.com/solomiata/Drivetrain.html
The turbo trans (AKA 'Type 3' or Model 'R' ) was derived from the original, and more robust, RX-2 through RX-4 5 speed Type 1 trans. It also has many internal design similarities to the Type 2. It mainly differs from the Type 2 in the input and output shafts grew from 15/16" to 1", a removable bellhousing and the case having strengthening ribs instead of being smooth. For more turbo trans info go to the links page and click on Mazdatrix and Felix's. A variant of the turbo trans has been used in Ford light duty '88-91 F-150, Bronco and Ranger trucks. It is model M50D-R2 and also known as the "Kogyo"

'R' gear ratio's
Car 1st 2nd 3rd 4th 5th
1988-89 929 3.483:1 2.015:1 1.391:1 1:1 .762:1
1987-88 TII 3.483:1 2.015:1 1.391:1 1:1 .762:1
1989-91 TII 3.483:1 2.015:1 1.391:1 1:1 .719:1
1993-95 FD3S 3.483:1 2.015:1 1.391:1 1:1 .719:1
89-93 B2600 3.730:1 2.158:1 1.396:1 1:1 .816:1


As you can see from the table the RWD 626 offers the closest gear ratio's from 3rd to 5th, making it a great road race transmission. It is however from the early pre-improvement generation, making it susceptible to breakage. This "improvement" happened somewhere in the TurboII years. The Series 5 RX7 transmissions are regarded by most to be the strongest... putting the split around 1988.

The inferences made in this section point to the Mitsubishi RWD (wideblock) bellhousing using the 87-88 model year B2600 bellhousing and thus the RX7 Turbo II Model R transmissions.

Sirius

4G61
The 4G61 normally displaces 1.6 L, but there are two distinct variations: An earlier version uses 3.03x3.39 in bore and stroke, while a later one has moved to 3.24x2.95 in. This engine was always DOHC 16-valve and used either ECFI or MPFI fuel injection. A turbocharged version was also produced for the Mirage. This motor DOES NOT HAVE BALANCE SHAFTS. The parts used by the factory to eliminate the balance shafts are what can be used on the other 4G6x motors to do the same (stubby shaft, blockoff bearings, balance shaft seal).
Applications:
3.03x3.39
1989 Mitsubishi Mirage ECFI
1989-1990 Dodge Colt MPI
3.24x2.95
1990-1992 Mitsubishi Mirage MPFI

4G62
The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal RWD/4WD use. With a 3.17x3.46 in bore and stroke, it displaces 1795 cc.
Applications:
1988 Mitsubishi Cordia
1988 Mitsubishi Tredia

4G63
The 4G63 was a 2.0 L (1997 cc) version. Again, there were two different bore and stroke versions, and both SOHC and DOHC were produced. It is found in various Mitsubishi models including the Eclipse and Galant but also appears in Chrysler-branded versions of the Eclipse: the Eagle Talon and Plymouth Laser.

Although this is unverified, I think I'll still include it:
Quote:Note that the 4G63 block in the Eclipse and Galant (and other Mitsubishi and Chrysler passenger cars) is not identical to the 4G63 block found in the Mitsubishi Mighty Max and Dodge Ram 50. The car-bound 4G63 has a bore and stroke of 3.35 in (85 mm) and 3.46 in (88 mm), whereas the truck 4G63 has a bore and stroke of 3.31 in (84 mm) and 3.54 in (90 mm).

Output for the US-spec 2004 Mitsubishi Lancer Evolution is 271 hp (202 kW) at 6500 RPM with 273 ft.lbf (370 Nm) of torque at 3500 RPM. It has a cast iron engine block and aluminum DOHC cylinder heads. It uses MPI multi-point fuel injection, has 4 valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods.

In the United Kingdom, a special Lancer Evolution, the FQ-400, produces 302.13 kW (405.2 hp), from a 4G63 engine. At 202.9 hp (151.3 kW) per liter, it has possibly the highest specific output per liter of any production engine.

Racing
Its turbocharged variant, 4G63T (also sometimes referred to simply as the 4G63), has powered Mitsubishi vehicles in World Rally Championships for years in the Galant VR-4, Lancer Evolution, Carisma GT and Lancer WRC04. It was the powerplant of the Lancer Evolution when Tommi Mäkinen won his four sequential WRC championships. The engine is also used in a variety of turbocharged 2-liter models of Galant and Eclipse.

Applications:
3.31x3.54 SOHC 2-barrel carburetor
1988-1989 Mitsubishi Mighty-Max
1988-1989 Dodge Ram 50
3.35x3.46 SOHC carburetor
1988 Mitsubishi Cordia
1988 Mitsubishi Tredia
3.35x3.46 SOHC MPFI
1988-1992 Dodge Colt Vista
1989-1992 Mitsubishi Galant
3.35x3.46 DOHC MPFI
1989-1992 Mitsubishi Galant
1990-1999 Mitsubishi Eclipse
1990-1999 Plymouth Laser
1990-1999 Eagle Talon
Mitsubishi Starion (Not USA)

4G64
The longitudinal 4G64 was the largest variant, at 2.4 L (2350 cc). Early models were 8-valve SOHC, but a later 16-valve DOHC version was also produced. All used MPFI with a 3.41 in (86.5 mm) bore and 3.94 in (100 mm) stroke.

A later 4G64, built in Shiga, Japan, was used as recently as 2004 in transverse applications. It has an cast iron engine block and aluminum SOHC cylinder heads. It uses SFI fuel injection, has 4 valves per cylinder with roller followers and features a one-piece cast camshaft cast and aluminum intake manifold.

The version used in the Chrysler Sebring/Stratus coupes produced 147 hp (110 kW) at 5500 RPM with 158 ft.lbf (214 Nm) of torque at 4000 RPM. The Chrysler version features fracture-split forged powder metal connecting rods.

The Lancer Ralliart/Eclipse version uses forged steel connecting rods. Output is 162 hp (121 kW) at 5500 RPM with 162 ft.lbf (260 Nm) of torque at 4000 RPM.
Applications:
1988 Mitsubishi Galant
1988-1990 Mitsubishi Van
1990-1992 Mitsubishi Pick-Up
1990-1992 Dodge Ram 50
Mitsubishi Lancer Ralliart
Mitsubishi Eclipse/Chrysler Sebring/Dodge Stratus

4G67
The 16-valve DOHC 4G67 displaced 1.8 L (1836 cc).
Applications:
Mitsubishi Mirage

4G69
The 4G69 is a 2.4 L (2378 cc) version built in Shiga, Japan. Bore is 87 mm and stroke is 100 mm. Output is 160 hp (119 kW) at 5750 RPM with 162 ft.lbf (289 Nm) of torque at 4000 RPM. It has an cast iron engine block and aluminum SOHC cylinder heads. It uses MFI fuel injection, has 4 valves per cylinder with roller followers and features forged steel connecting rods, a one-piece cast camshaft, and a cast aluminum intake manifold.
Applications:
2004 Mitsubishi Galant
2004 Mitsubishi Outlander

V6 Mitsubishi Engines
This thread is mainly about the I4 motors, but I found this and had to pust it.

The 6A1x series is a V6 piston engine from Mitsubishi Motors. The 1.6 L 6A10 holds the distinction of being the smallest modern production V6.

6A10
With the engine capacity of only 1.6 L (1597 cc), this is the smallest yet most powerful 1.6 L engine available on production car. With the configuration of 6 cylinders, dual overhead cam (DOHC), and 4 valves per cylinder, the 6A10 engine manages to output 140 hp (104 kW) @ 7000 rpm in stock condition.

Available in the Mitsubishi Lancer MX in 1992, this engine was once the most sought after engine for modification in Japan. In 1994, the Kotsumi's brothers from Kanagawa, Japan, managed to turn the 1.6 litre engine into a 'little monster' able to produce 430 bhp (320 kW) @ 6000 rpm without a forced induction system.

Specifications
Displacement: 1597 cc
Power: 140 PS (103 kW) @ 7000 rpm
Torque: 147 Nm @ 4500 rpm
Power density: 7.71
Engine type: V type 6 cylinder DOHC 24 valve
Fuel system: ECI multiple (electrically controlled gasoline injection)
Fuel type: Unleaded premium gasoline
Compression ratio: 10
Bore: 73 mm
Stroke: 63.6 mm
Fuel consumption at 10-15 modes: 8.3 L/100 km

6A12
The 2.0 L (1997 cc) 6A12 is less notable than its little brother. It was available with and without the MIVEC variable valve timing system and was a DOHC 24-valve engine.
Applications:
Mitsubishi FTO
Mitsubishi Eterna

6A13
Development continued with the 2.5 L (2498 cc) 6A13.

Diesel
This is a collection of the Diesel Engines mentioned above as well as some more. Looks like I need to add a 6cyl section to this thread!
4D55
2.3L (2346 cc) Diesel truck motor offered 83-85. Based on the Astron (5) Family of motors. Wideblock.

Applications:
Mitsubishi Mighty Max (83-85)
Dodge D-50 pickups (83-85)
Ford Rangers (85-87)

4D56
2.5L Diesel truck motor. Based on the Astron (5) Family of motors. Wideblock

4D65
1.8L Diesel motor FWD. Based on Sirius (6) Family of motors. Narrowblock.

4D68
2.0L Diesel motor FWD. Based on Sirius (6) Family of motors. Narrowblock.


6D22 & 6D22T

6D24 & 6D24T


R28 (998cc)
Applications:
Colt Formula F3A

In 1966, Mitsubishi pioneered the production of formula cars with the F3A. Using a chassis made by Brabham and gearbox by Hewland, the F3A was powered by the R28 type engine with two twin-choke Mikuni Solex 40PHH carburetors. In 1966 it took outright victory in the 3rd Japan Grand Prix Exhibition Race, driven by Osamu Mochizuki. One year later, in the hands of Hiroshi Hasegawa, it took a class win in the 4th Japan Grand Prix Formula Car Race.


R39B 2.0L(1994cc)
Applications:
Colt Formula F2000
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This racing single-seater won the Japan Grand Prix on May 3,1971 in the hands of Kuniomi Nagamatsu. It was powered by a R39B engine developed especially for racing. It was also fitted with side radiators, which have since become a feature of all modern formula cars. This was to be the last single-seater competition car made by Mitsubishi.