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



The 4G61 displaces 1595 cc (82.3 x 75.0 mm bore/stroke). 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. The 4G61 does not have balance shafts like the other 4G6x motors. Instead, it has different components, some of which can be used on the "Silent Shaft" engine.


  • 4G61 91kW-124HP/6500 142Nm/5000
  • 4G61T (USA/Canada only) 99kW-135HP/6000 191Nm/3000
  • 4G61T (Japan) 160HP-117.68kW/6000 220.65Nm/2500



The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal rear-wheel drive and all-wheel drive use. With an 80.6 x 88.0 mm bore / stroke, it displaced 1795 cc.



The 4G63 was a 1997 cc version. (85mm Bore x 88 mm Stroke) SOHC and DOHC were produced. The DOHC version was introduced in 1987 in the Japanese market Galant VR-4 and came turbocharged or naturally aspirated. It is found in various models including the 1988-92 Galant VR-4 and the U.S. market 1990-1999 Eclipse.

The SOHC version was used in Mitsubishi Galant models until 1993. It has 76 kW of output and 157 NM of torque at 4750 rpm.

Also the SOHC version is produced until the late 90s and early 2000 and it is used in Mitsubishi cars like the Montero and the 2.0L 2-door Pajero with an output of 101kw at 4700 rpm.

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 beefier rods and the use of 6 bolts to secure the flywheel to the crankshaft; May 1992 to 2006 Evolution versions have lighter rods and use 7 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 Japanese/US Mitsubishi Lancer Evolution is 271 hp (202 kW) at 6500 rpm with 273 ft·lbf (370 N·m) of torque at 3500 rpm. It has a cast iron engine block and aluminum DOHC cylinder head. It uses multi-point fuel injection, has 4 valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods. With the release of the Lancer Evolution IX ( 286 hp @ 6500rpm, 289ft*lb of @ 3500rpm, 7000 rpm redline), it has received Mitsubishi's MIVEC variable valve timing system, which gives smoother power delivery and a flatter torque curve.

In the United Kingdom, a special Lancer Evolution, the FQ-400, produces 302.13 kW (405.2 hp), from a 4G63 engine. At 202.6 hp (151.3 kW) per liter, it has possibly the highest specific output per liter of any production engine.


Its turbocharged variant, 4G63T (also sometimes referred to simply as the 4G63), has powered Mitsubishi vehicles in World Rally Championships for years in the Mitsubishi 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 in his lancer



The longitudinal 4G64 is the second largest variant, at (2350 cc). Early models were 8-valve SOHC, but a later 16-valve SOHC and DOHC version was also produced. All used MPFI with an 86.5 mm bore and 100 mm stroke. The 4G64 was also available with gasoline direct injection. The version used in the Chrysler Sebring/Stratus coupes produced 152 hp (110 kW) at 5500 rpm with 162 ft·lbf (214 N·m) of torque at 4000 rpm. The Chrysler version features fracture-split forged powder metal connecting rods. The 4g64 is an interference motor like the 4g63.



The 16-valve DOHC 4G67 displaced 1836 cc. Bore x Stroke [mm]: 81.5 x 88



The 4G69 is a 2378 cc version built in Shiga, Japan. Bore is 87 mm and stroke is 100 mm. Output is 162 hp (119 kW) at 5750 rpm (160 in the Sportback Wagon) with 162 ft·lbf (219 N·m) of torque at 4000 rpm. It has a cast iron engine block and aluminum SOHC cylinder heads. It uses multi-point 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. The 4G69 incorporates Mitsubishi's MIVEC Variable Valve Timing technology. Applications:

NB: From 2005 a slightly detuned version (115kW, 220Nm) is used across the entire Lancer range in Australia.

edit @ 25 Aug 2008 16:12:16 by babyCK2