straight-4 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 ...

automobile A car or automobile is a motor vehicle with Wheel, wheels. Most definitions of ''cars'' say that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, pe ...

Mitsubishi Motors is a Japanese multinational automobile manufacturer headquartered in Minato, Tokyo, Japan.single- and double- overhead camshaft heads. Some feature ''

MIVEC MIVEC (Mitsubishi Innovative Valve timing Electronic Control system) is the brand name of a variable valve timing (VVT) engine technology developed by Mitsubishi Motors. MIVEC, as with other similar systems, varies the timing of the intake and ex ...

''

variable valve timing In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with var ...

, and it was the first modern gasoline direct injection engine upon its introduction in August 1996.

4G91

The ''4G91'' uses a bore and stroke of for a total displacement of . With a 9.5:1 compression ratio and DOHC, four-valve-per-cylinder head and multi-point EFI, this engine produces at 6,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

and at 5,000 rpm. The 4G91 was a short-lived model, mainly built between 1991 and 1995 and rarely seen in export markets. There was also a carbureted model, with at 6,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

and at 3,500 rpm. Applications *

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 ...

*

Mitsubishi Mirage The Mitsubishi Mirage is a range of cars produced by the Japanese manufacturer Mitsubishi from 1978 until 2003 and again since 2012. The hatchback models produced between 1978 and 2003 were classified as subcompact cars, while the sedan and s ...

4G92

The ''4G92'' displaces . It first appeared in the late-1991 Japanese-spec Mirage RS and Super R in

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

form. The 4G92 is basically a version of the ''4G91'' with the bore increased to . In the original DOHC 16V form it produces . Later, a fuel-efficient SOHC version was added, but the 4G92 is best known in its high-performance ''

MIVEC MIVEC (Mitsubishi Innovative Valve timing Electronic Control system) is the brand name of a variable valve timing (VVT) engine technology developed by Mitsubishi Motors. MIVEC, as with other similar systems, varies the timing of the intake and ex ...

'' equipped

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

version, which fully replaced "ordinary"

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

in 1993. Power output was raised as high as , as found in the JDM Mirage Cyborg-ZR and 1992 Lancer MR, making it one of the most powerful 1.6-litre naturally aspirated engines. A modular displacement (MD) version of the 4G92

MIVEC MIVEC (Mitsubishi Innovative Valve timing Electronic Control system) is the brand name of a variable valve timing (VVT) engine technology developed by Mitsubishi Motors. MIVEC, as with other similar systems, varies the timing of the intake and ex ...

was also produced – MD is Mitsubishi's

cylinder deactivation Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large, multi-cylinder engines. Many automobile ...

system which helps improve fuel consumption. 4G92P SOHC 16 Valve * Total Displacement - * Bore - * Stroke - * Compression Ratio - 10.0:1 * Maximum Output (1) - at 6,000 rpm, and at 5,000 rpm * Maximum Output (2) - at 5,500 rpm, and at 4,000 rpm **(1): Early European and JDM versions with 20°/42° intake and 54°/2° exhaust valve timing **(2): General export and later European versions with 14°/58° intake and 52°/16° exhaust valve timing 4G92

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve * Total Displacement - * Bore - * Stroke - * Compression Ratio - 11.0:1 * Maximum Output - at 7,000 rpm * Maximum Torque - at 4,500 rpm 4G92-MIVEC

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve * Total Displacement - * Bore - * Stroke - * Compression Ratio - 11.0:1 * Maximum Output - at 7,500 rpm * Maximum Torque - at 7,000 rpm Applications *

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 ...

*

Mitsubishi Mirage The Mitsubishi Mirage is a range of cars produced by the Japanese manufacturer Mitsubishi from 1978 until 2003 and again since 2012. The hatchback models produced between 1978 and 2003 were classified as subcompact cars, while the sedan and s ...

*

Mitsubishi Carisma The Mitsubishi Carisma was a large family car produced for the European market by Mitsubishi Motors from 1995 to 2004.Proton Wira *

Proton Satria The Proton Satria is a hatchback automobile produced by Malaysian manufacturer Proton from 1994 to 2005 in the first generation model and from 2006 to 2015 in the Satria Replacement Model (SRM), known as the Proton Satria Neo. The name ''Satria'' ...

4G93

The 4G93 is a engine available in both SOHC and

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

versions. Turbocharged variants are also produced. In mid 1996 Mitsubishi released a gasoline direct injection (GDI) version of the 4G93. This GDI model saw a production of over a million units though it was a heavy polluter therefore only sold in the Japanese market. A partially cleaned up version (with less power) was later sold in Europe, and was among the first of the modern GDI engines. It brought good fuel economy and, if well serviced, long engine life. 4G93 SOHC 16 Valve MPI * Multi-Point Injection (MPI) * Total Displacement - * Bore - * Stroke - * Compression Ratio - 9.5:1 * Maximum Output - * Maximum Torque - 4G93 SOHC 16 Valve Carburetor * Carburetor * Total Displacement - * Bore - * Stroke - * Compression Ratio - 9.5:1 * Maximum Output - * Maximum Torque - 4G93

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve MPI * Multi-Point Injection (MPI) * Total Displacement - * Bore - * Stroke - * Compression Ratio - 10.5:1 * Maximum Output - @ 6,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

* Maximum Torque - @ 5500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

4G93T

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve Turbo * Multi-Point Injection (MPI) with TD04 turbocharger * Total Displacement - * Bore - * Stroke - * Compression Ratio - 8.5:1 (Upgraded to 9.1:1 in 1994) * Maximum Output - at 6,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

(Upgraded to in 1994, and again to in 1995) * Maximum Torque - at 3,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

(Upgraded to in 1994, and again to in 1995) 4G93

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve GDI * Gasoline Direct Injection (GDI) * Total Displacement - * Bore - * Stroke - * Compression Ratio - 12.0:1 * Maximum Output - ** Europe: at 5,250

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ at 5,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ at 5,500 rpm ** Japan: at 5,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ at 6,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ at 6,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

* Maximum Torque - ** Europe: @ 3,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ @ 3,750

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

** Japan: @ 3,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ @ 3,750

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ @ 5,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

4G93

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve GDI Turbo * Gasoline Direct Injection (GDI) with turbocharger * Total Displacement - * Bore - * Stroke - * Compression Ratio - 10.0:1 * Maximum Output - @ 5,200

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ @ 5,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

* Maximum Torque - @ 3,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

/ @ 3,500

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

Applications *

Mitsubishi Space Wagon The is a group of autonomous Japanese multinational companies in a variety of industries. Founded by Yatarō Iwasaki in 1870, the Mitsubishi Group historically descended from the Mitsubishi zaibatsu, a unified company which existed from 1870 ...

*

Mitsubishi Space Star The Mitsubishi Space Star is a car produced by the Japanese manufacturer Mitsubishi Motors from either 1998 or 1999 until 2005. Described as a hatchback, a compact people carrier, or a micro MPV, it was built at the NedCar factory in the Nethe ...

*

Mitsubishi Carisma The Mitsubishi Carisma was a large family car produced for the European market by Mitsubishi Motors from 1995 to 2004.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 ...

*

Mitsubishi Libero The Mitsubishi Mirage is a range of cars produced by the Japanese manufacturer Mitsubishi from 1978 until 2003 and again since 2012. The hatchback models produced between 1978 and 2003 were classified as subcompact cars, while the sedan and ...

*

Mitsubishi Mirage The Mitsubishi Mirage is a range of cars produced by the Japanese manufacturer Mitsubishi from 1978 until 2003 and again since 2012. The hatchback models produced between 1978 and 2003 were classified as subcompact cars, while the sedan and s ...

*

Mitsubishi FTO The Mitsubishi FTO is a front engined, front-wheel drive coupe produced by Mitsubishi Motors between 1994 and 2000. It was originally planned to be exclusively for the Japanese domestic market, although its popularity as a grey market import to th ...

* Proton Wira *

Proton Satria The Proton Satria is a hatchback automobile produced by Malaysian manufacturer Proton from 1994 to 2005 in the first generation model and from 2006 to 2015 in the Satria Replacement Model (SRM), known as the Proton Satria Neo. The name ''Satria'' ...

*

Proton Putra The Proton Putra ( Malay, "son" or "prince") is a coupé automobile produced by Malaysian automobile company Proton. Production of the Putra started in late 1996 and ended in 2001, but was briefly relaunched in limited numbers in 2004 for the d ...

*

Mitsubishi Colt The Mitsubishi Colt is a nameplate from Mitsubishi Motors that has been applied to a number of automobiles since 1962. It was first introduced with a series of kei and subcompact cars in the 1960s, and then for the export version of the subcompa ...

GTI * Mitsubishi Galant 1996 * Mitsubishi Pajero iO / Pajero Pinin / Shogun Pinin / Montero iO / Pajero TR4 *

Brilliance BC3 The Brilliance BC3 is a sport compact coupé produced by the joint venture of Brilliance Auto, Mitsubishi Motors, Porsche AG and BMW Group. Overview It was originally announced at the Beijing Auto Show in 2006 as the Brilliance Zhonghua M3 the ...

*

Brilliance BS6 The Brilliance BS6, in China sold as Zhonghua Zunchi (), and later as the Brilliance M1 is a mid-sizecar produced by Brilliance Auto in the People's Republic of China. It was originally developed by Italdesign Giugiaro and launched as the Brilli ...

*

Brilliance BS4 The Brilliance BS4 is a four-door compact notchback sedan produced by Brilliance Auto in the People's Republic of China, where it is known as the Zhonghua Junjie. The car was scheduled for launch in Germany, Europe's largest national car marke ...

*

Volvo S40 The Volvo S40 is a series of compact and subcompact executive automobiles marketed and produced by the Swedish manufacturer Volvo Cars from 1995 to 2012. The first generation (1995–2004) was introduced in 1995 with the S40 (S from saloon) ...

* Volvo V40

4G94

The 4G94 is a version built in

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

, used in the

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 ...

. It has a cast iron engine block with

Multi-point fuel injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All comp ...

and an aluminum SOHC cylinder head with forged steel connecting rods and four valves per cylinder. The 4G94 Also comes in the GDI DOHC variant which can be found in the Mitsubishi Galant. 4G94 SOHC 16 Valve MPI *Multi-Point Injection (MPI) *Total Displacement - *Bore - *Stroke - *Compression Ratio - 9.5:1 *Maximum Output - @ 5,200

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

*Maximum Torque - @ 4,250

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

4G94

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

16 Valve GDI *Gasoline Direct Injection (GDI) *Bore - *Stroke - *Compression Ratio: 11.0:1 *Maximum Output: / 5,700 rpm *Maximum Torque: / 3,750 rpm Applications Applications * Mitsubishi Pajero iO / Pajero Pinin / Shogun Pinin / Montero iO / Pajero TR4 * Mitsubishi Adventure/Mitsubishi Kuda/Mitsubishi Freeca/Soueast Freeca *

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 ...

* Mitsubishi Galant * Hawtai Santa Fe

References

"The Mitsubishi 4G9x Engine Guide"
Michael Knowling, ''Autospeed'', issue 389, July 17, 2006

Mitsubishi Motors press release, September 11, 2001 {{Mitsubishi Motors technologies 4G9 Straight-four engines Gasoline engines by model

4G91

4G92

4G93

4G94

See also

References