The Mitsubishi Sirius or 4G6/4D6 engine is the name of one of Mitsubishi Motors' four series of inline-four automobile engines, along with Astron, Orion, and Saturn.

The 4G6 gasoline engines were the favoured performance variant for Mitsubishi. The 4G61T powered the Colt Turbo, while the 4G63T, first introduced in the 1980 Lancer EX 2000 Turbo, became noteworthy as the engine under the hood of the World Rally Championship-winning Lancer Evolution. A UK-market Evo known as the FQ400 had a version of the Sirius, making it the most powerful car ever sold by Mitsubishi. Since the 2010s, updated versions of the Sirius engine equipped with a new head including variable valve timing have been manufactured by Shenyang Aerospace Mitsubishi Motors Engine Manufacturing (SAME) as the 4K series.

The 4D6 diesel engines supplemented the larger 4D5. Bore pitch is 93 mm.

4G61 (1.6 liters) The 4G61 displaces with bore/ full length stroke of . This engine was always DOHC 16-valve and used either Multi-point (MPFI) or Electronic Control (ECFI) fuel injection. A turbocharged version was also produced for the Mirage and Lancer. Unlike the other Sirius motors, the 4G61 does not have balance shafts.

Performance 4G61 at 6100 rpm. 4G61T (USA/Canada only) at 6000 rpm and of torque at 3000 rpm. 4G61T (Japan, early) at 6000 rpm and of torque at 2500 rpm. (late) at 6000 rpm and of torque at 2500 rpm.

Applications 1988–1992 Mitsubishi Mirage / Mitsubishi Colt (MPFI) 1988–1992 Dodge Colt / Plymouth Colt 1988–1992 Eagle Summit 1992–1995 Hyundai Elantra

4G62 (1.8 liters) The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal rear-wheel drive and all-wheel drive use. With a bore and stroke of , it displaces . It was available either in carburetor form, multi-point fuel injection, or ECI Turbo as found in the Lancer EX 1800GSR or 1800GT, and Cordia GSR.

Applications 1980–1987 Mitsubishi Lancer EX 1800GSR or 1800GT (A175A) 1981–1986 Mitsubishi Delica/L300/Express 1983–1987 Mitsubishi Chariot HR 1983–1989 Mitsubishi Cordia 1983–1989 Mitsubishi Tredia 1984–1988 Mitsubishi Galant/Eterna

4G62T Turbocharged version of the 4G62

4G63/G63B (2.0 liters)

The 4G63 was a version.

Bore x stroke is SOHC and DOHC were produced. Both versions were available in either naturally aspirated and turbocharged form. For front-wheel drive applications, the turbocharged Sirius' name was changed to "Cyclone Dash". As fitted to the fifth generation Galant JIS gross were claimed — the output claims later shrank to — for the turbocharged and intercooled "Sirius Dash 3x2 valve" engine. This version could switch between breathing through two or three valves per cylinder, to combine high top-end power with low-end drivability as well as allowing for economical operation. It was a modification of Mitsubishi MCA-Jet technology which used a secondary intake valve to inject air into the engine for more efficient emissions control. The DOHC version was introduced in 1987 in the Japanese market Galant, and came in turbocharged or naturally aspirated form. It is found in various models including the 1988–92 Mitsubishi Galant VR-4, the U.S. market 1990-1999 Mitsubishi Eclipse, and the Mitsubishi Lancer Evolution I–IX. Later versions also received Mitsubishi's variable valve timing system, MIVEC.

A SOHC carbureted eight-valve version (engine code G63B) was also available in Mitsubishi's pickup trucks (L200, Strada, Mighty Max, Dodge Ram 50) from the eighties until the mid-nineties. It produces at 5500 rpm in European trim (1989). The SOHC version was also used in Mitsubishi Galant models until 1993. It has of output and of torque at 4,750 rpm.

Also, a SOHC version was produced until the late 90s and early 2000s and was used in Mitsubishi cars like the Montero and the 2.0 L 2-door Pajero with an output of at 4700 rpm. The N33 and N83 Space Wagons and Galant (UK and Philippine market) received the 4G63 in single-cam sixteen-valve format, with the Philippine variant outputs varying between at 5500 rpm and at 6000 rpm. A similar version, with , was also used in some light duty Mitsubishi Canters from 1997 on.

The Mitsubishi Eclipse, Eagle Talon and Plymouth Laser introduced the DOHC turbocharged intercooled version to the U.S. in 1989 through Diamond Star Motors, a joint venture between Mitsubishi Motors and the Chrysler Corporation. From 1990 to late April 1992 came thicker connecting rods and the use of six bolts to secure the flywheel to the crankshaft; May 1992 to 2006 Evolution versions have lighter rods and use seven bolts to secure the flywheel to the crankshaft. They are referred to as the "six bolt" and "seven bolt" engines, respectively.

Output for the 2003 US Mitsubishi Lancer Evolution is at 6500 rpm with of torque at 3500 rpm. It has a cast iron engine block and aluminium DOHC cylinder head. It uses multi-point fuel injection, has four valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods. The final version of the engine was found in Lancer Evolution IX. It was equipped with Mitsubishi's variable valve timing system, MIVEC. This version also had a revised turbocharger, extended reach spark plugs, two-piece rings.

A SOHC 16 valve turbocharged version called 4G63S4T is produced by Shenyang Aerospace Mitsubishi Motors Engine Manufacturing (SAME) in Shenyang, China, producing a peak power of and a peak torque of for most applications, and rated in some applications. This version is equipped with a TD04 turbocharger.

Racing Its turbocharged variant, 4G63T (also sometimes referred to simply as the 4G63), has powered Mitsubishi vehicles in World Rally Championships (WRC) for years in the Lancer EX 2000 Turbo, Galant VR-4, Lancer Evolution, Carisma GT, and Lancer WRC04. It was the powerplant of the Lancer Evolution when Tommi Mäkinen won his four consecutive WRC championships in his Lancer. MHI and T-4 turbos were both used as power for these engines. A 1.7L variant of the 4G63 was also used in a custom made hill-climb a DDR Motorsport DDR Grullón GT4 made by Komvet Racing.

Applications 1980–2003 Mitsubishi Galant 1981–1987 Mitsubishi Lancer EX 2000 Turbo 1982–1987 Mitsubishi Starion 1983–1988 Mitsubishi Cordia 1983–1988 Mitsubishi Tredia 1983–1992 Dodge Colt Vista 1983–1998 Mitsubishi Chariot 1983–1989 Mitsubishi L200/Mighty Max 1983–1991 Mitsubishi Pajero (L040) 1985–1998 Mitsubishi Delica 1987–1989 Dodge Ram 50 1989–1992 Eagle Vista Wagon 1990–1998 Eagle Talon 1990–1999 Mitsubishi Eclipse 1990–1994 Plymouth Laser 1992–2007 Mitsubishi Lancer Evolution 1994–1998 Mitsubishi RVR 1996–1999 Proton Perdana 1997–2000 Mitsubishi Canter 1998-2007 Mitsubishi Adventure Mitsubishi Freeca Mitsubishi Jolie 1998 Mitsubishi FTO GT300 racecar 1999–2005 Mitsubishi Dion 2000-2006 Mitsubishi Kuda 2001-2014 Mitsubishi Savrin 2002–200? Mitsubishi Lancer 2003–2005 Mitsubishi Airtrek Hyundai production - also called Hyundai Sirius engine 1987–1988 Hyundai Stellar (engine code G4CP) 1992–2005 Hyundai Sonata (engine code G4CP) 1998–2003 Hyundai Santamo (engine code G4CP) 2000–2008 Hyundai Santa Fe (engine code G4JS) 1999-2003 Hyundai Trajet (engine code G4JP) 2000–2004 Kia Joice (engine code G4CP) 2000–2005 Kia Optima/Magentis (engine code G4JP) Chinese production 2004–2010 Brilliance BS6 2006 Brilliance BS4 2007–2011 Shuanghuan SCEO 2007–2015 Great Wall Coolbear 2009–2012 Great Wall Haval H3 2009 Landwind X6 2011–present Landwind X8 4X2 2.0 2011–2013 Emgrand EC8 2014–2016 Zotye T600 2015 BAW Yusheng 2016–2017 Landwind X7 2016–2021 Zotye T700 2017–2019 Zotye SR9 2018 Beijing BJ2022 Brave Warrior

4G64 (2.4 liters) The 4G64 is the second largest variant, at . Early models were 8-valve SOHC, but a later 16-valve SOHC and DOHC version was also produced. All used MPFI and had a bore and stroke of . The 4G64 was later also available with gasoline direct injection. Output varies between at 5,250 rpm with of torque at 4,000 rpm in the Mitsubishi L200 and at 5,500 rpm with of torque at 4,000 rpm in the Chrysler Sebring/Stratus. The Chrysler version features fracture-split forged powder metal connecting rods. The DOHC and SOHC 16-valve 4G64 are interference engines, while the SOHC 8-valve 4G64 is a non interference engine. From March 1996 an LPG version with at 5,000 rpm was available in the Mitsubishi Canter.

The 4G64 is a very popular engine in China, where it was used on the Changfeng Lièbào, a series of cars based on the Mitsubishi Pajero V20 from 2002 to 2021, and the Soueast Delica based on the Mitsubishi Delica van from 1996 to 2013. The 4G64 engine has been produced by Shenyang Aerospace Mitsubishi Motors Engine Manufacturing (SAME), in Shenyang, China where it was assembled through semi-knockdown kits in August 1998 and complete knockdown kits in September 1999. Regular assembling of the engines commenced in April 2000. The Chinese market Ford Transit and its successor, the JMC Teshun use the 4G64 engine as a standard petrol option unlike the international third generation version which uses regular Ford engines.

Applications 1983–1992 Dodge Colt Vista (AWD only) 1986–1998 Hyundai Grandeur 1986–2005 Mitsubishi Triton 1987–1990 Mitsubishi Sapporo 1988–2018 Mitsubishi Delica/Van 1989–1991 Hyundai Sonata 1990–present Mitsubishi L200 1990–1992 Dodge Ram 50 1990–1996 Mitsubishi Mighty Max 1993–1997 Mitsubishi Chariot 1993–2003 Mitsubishi Space Wagon 1996–2005 Mitsubishi Eclipse 1996–1998 Mitsubishi Magna (codenamed 4G64-S4 and fitted to the TE-TF series) 1996–2003 Mitsubishi Galant (GDI, European market) 1997–1999 Mitsubishi Montero Sport (North American, ES model) 1998–2003 Mitsubishi Space Wagon 1999–2005 Hyundai Sonata 2000–2005 Kia Optima 2000–2005 Mitsubishi Eclipse 2001–2004 Dodge Stratus Coupe 2001–2006 Hyundai Santa Fe 2001 Mitsubishi Airtrek 2002–2021 Changfeng Liebao (a series of cars based on the Mitsubishi Pajero V20 from China) 2003-2006 Kia Sorento 2.4i Manual 2003 Mitsubishi Outlander 2004 Brilliance BS6 2004-2006 Derways Cowboy 2004–2006 Chery Eastar 2004–2015 Hyundai Terracan 2005–2009 Great Wall Hover (X240 and V240) 2005–2009 Shuanghuan SCEO 2005 Mitsubishi Zinger 2007 Landwind X6 2008–2015 Chery V5 2006–present Ford Transit/JMC Teshun (Chinese market) present Generac 22-27KW Protector QS Generators

4G64T Turbocharged version of the 4G64.

present Generac 32-38KW Protector QS Generators

4D65 (1.8 liter diesel) Known as the "Sirius Diesel", the 4D65 has the same dimensions as the 4G62 . It was available either naturally aspirated or turbocharged (with an air-to-air intercooler), and was used in most Mitsubishi diesel passenger cars in the eighties and beginning of the nineties. It was developed specifically to be transversally installed in front-wheel-drive cars, unlike the preceding 4D5-series which remained in production for commercial vehicles. The 1.8 TD power figures are comparable to those of the 22 percent larger, 2.3 liter 4D55, with more low-down torque and while being much smoother. The cast-iron block was typical for Mitsubishi, but unusual for diesel engines, in being equipped with balance shafts.De Leener, p. 122 A number of installations combined this engine with four-wheel-drive.

Applications 4D65 (naturally aspirated) 1983–1987 Mitsubishi Mirage/Colt/Lancer (C14) 1985–1992 Mitsubishi Mirage/Lancer Van/Wagon (C14/C34) 1987–1991 Mitsubishi Mirage/Colt/Lancer (C64/C74)

4D65T (turbocharged) 1983–1989 Mitsubishi Galant/Galant Σ/Eterna Σ (E14) 1984–1991 Mitsubishi Chariot/Space Wagon (D09W) 1987–1992 Mitsubishi Galant/Eterna (E34) 1988–1991 Mitsubishi Lancer (C74, 4WD sedan only) 1991–1995 Mitsubishi Lancer/Mirage/Libero (CB7, CD7)

4G67 (1.8 liters) The 16-valve DOHC 4G67 displaced . Bore x Stroke:

Applications 1989–1992 Colt/Lancer 1.8 GTI (C58A/C68A) 1989–1992 Mitsubishi Galant/Eterna (E35A) 1993–1995 Hyundai Elantra, this engine was called G4CN by Hyundai