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| 4G63 engine | |
|---|---|
| Name | 4G63 |
| Manufacturer | Mitsubishi Motors |
| Production | 1980s–2010s |
| Configuration | Inline-four |
| Displacement | 2.0 L |
| Block | Cast iron |
| Head | Aluminium |
| Valvetrain | SOHC / DOHC |
| Fuel | Gasoline |
| Turbocharged | Yes / No |
| Power | 90–350+ hp |
| Torque | 150–350+ Nm |
4G63 engine The 4G63 is a family of inline-four internal combustion engines developed and produced by Mitsubishi Motors that powered a wide range of passenger cars, performance models, and motorsport entries. Introduced in the 1980s, the 4G63 gained renown through applications in high-profile models and competition programs associated with Group A (racing), World Rally Championship, and touring car series. Its longevity and adaptability made it a staple in platforms connected to Mitsubishi Lancer Evolution, Galant VR-4, and various international markets.
The 4G63 lineage began as part of Mitsubishi's Sirius engine family and evolved through iterations that included single overhead cam (SOHC) and double overhead cam (DOHC) designs, naturally aspirated and turbocharged variants. Throughout its lifecycle the 4G63 was installed in mainstream sedans, compact coupes, and rally homologation specials that intersected with marques and organizations such as Ralliart, Tommi Mäkinen, and teams competing in the World Rally Championship. Its robust cast iron block and aluminium cylinder head layout facilitated aftermarket engineering by independent firms like Garrett Motion, HKS (company), Greddy and tuning houses influencing street, drag, and circuit applications.
Basic architecture features a four-cylinder, inline configuration with an iron block and aluminium head; early SOHC heads shared design lineage with the Sirius engines, while later DOHC 16-valve designs incorporated features used in rally-spec powerplants. Bore and stroke dimensions produced roughly 2.0 liters displacement, with compression ratios, cam timing, and intake/trickle systems varying by market and emission controls influenced by regulations in regions such as United States, Japan, and Europe. Turbocharged variants used water-cooled turbos, intercoolers, and strengthened internals to withstand boost levels seen in homologation models aligned with FIA categories. Ancillary systems included distributors and later coil-on-plug components sourced through suppliers associated with companies like Denso and NGK.
The 4G63 spawned several notable subtypes: early SOHC two-valve forms for economy models, DOHC 16-valve naturally aspirated versions used in performance coupes, and turbocharged DOHC versions created for rally and sport sedans. Key factory evolutions coincided with model refreshes of the Mitsubishi Galant, Mitsubishi Lancer, and the factory-backed Evo I–III and Evo IV–IX series where cylinder head revisions, piston design changes, and crankshaft strengthening were implemented. Regional engine codes and emission-driven tweaks produced variations installed in markets including Australia, United Kingdom, Canada, and various Asian countries, with tuning-friendly platforms drawing aftermarket components from vendors such as K&N Engineering and AEM (company).
Stock outputs ranged broadly: lower-powered SOHC units delivered modest horsepower for compact cars sold through dealer networks in cities like Tokyo and Los Angeles, while turbocharged DOHC iterations achieved much higher specific outputs in homologation models used by drivers such as Tommi Mäkinen and teams backed by Mitsubishi Ralliart. The engine powered performance variants in passenger platforms tied to events at venues like Rally Finland and circuits such as Silverstone Circuit. Its durability under high thermal and mechanical stress made it a favorite for conversions and swaps by clubs and builders associated with communities in California, Japan, and European tuning scenes, frequently paired with transmission units from manufacturers such as Getrag and Mitsubishi Heavy Industries.
The 4G63's prominence in motorsport was cemented through success in the World Rally Championship and national rally series where factory and privateer entries campaigned Galant VR-4 and Lancer Evolution models. Drivers and teams including Tommi Mäkinen, Richard Burns (rally driver), and Mitsubishi Ralliart programs achieved stage wins and championships utilizing highly modified 4G63 powerplants. Tuning culture around the engine spawned specialized builds for drag racing, circuit endurance, and hillclimb events promoted by organizations such as FIA regional affiliates, with aftermarket manufacturers like HKS (company), Tomei and Greddy supplying turbochargers, camshafts, pistons, and engine management systems to push outputs well beyond factory figures.
Produced across multiple decades in plants associated with Mitsubishi Motors Corporation and its subsidiaries, the 4G63 influenced engineering approaches to durable high-performance four-cylinder engines and left a lasting imprint on tuner culture and motorsport heritage. Its use in road-going homologation specials and championship-winning rally cars secured a reputation paralleled by engines from contemporaries such as Toyota 3S-GTE and Honda B-series. The 4G63 remains a sought-after platform for restorations, competitive builds, and educational study by institutions like technical colleges and enthusiast clubs in regions including Europe and North America, preserving its status as a benchmark in four-cylinder performance engineering.
Category:Mitsubishi engines Category:Inline-four engines Category:Automotive engines