| Mitsubishi Sirius engine | |
|---|---|
 Mitsubishi G62B engine | |
| Overview | |
| Manufacturer | Mitsubishi Motors |
| Also called | 4G6/4D6 |
| Production | 1980–2013 (4G6 & 4D6 Series) 1980–present (4K Series: China) |
| Layout | |
| Configuration | Inline-four |
| Displacement | 1.6 L; 97.3 cu in (1,595 cc) 1.8 L; 109.5 cu in (1,795 cc) 1.8 L; 112.0 cu in (1,836 cc) 2.0 L; 121.9 cu in (1,997 cc) 2.0 L; 121.9 cu in (1,998 cc) 2.4 L; 143.5 cu in (2,351 cc) 2.4 L; 145.1 cu in (2,378 cc) |
| Cylinder bore | 80.6 mm (3.17 in) 81.5 mm (3.21 in) 82.3 mm (3.24 in) 82.7 mm (3.26 in) 85 mm (3.35 in) 86.5 mm (3.41 in) 87 mm (3.43 in) |
| Piston stroke | 75 mm (2.95 in) 88 mm (3.46 in) 93 mm (3.66 in) 100 mm (3.94 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | SOHC & DOHC, 2 & 4 valves x cyl. with MIVEC on some versions |
| Combustion | |
| Turbocharger | Some versions |
| Fuel system | Carburetor, Fuel injection |
| Fuel type | Gasoline, Diesel |
| Cooling system | Water-cooled |
| Chronology | |
| Successor | Mitsubishi 4B1 engine (4G6 Gasoline engine) Mitsubishi 4N1 engine (4D6 Diesel engine) |
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 their Colt Turbo, while the 4G63T, first introduced in the 1980 Lancer EX 2000 Turbo, went on to see service in the Sapporo and Starion coupés during the so-called "turbo era" of the 1980s, before creating for itself an illustrious motorsport heritage as the powerplant under the hood of the World Rally Championship-winning Lancer Evolution. A UK-market Evo known as the FQ400 had a 400 bhp (298 kW; 406 PS) version of the Sirius, making it the most powerful car ever sold by Mitsubishi.
The 4D6 diesel engines supplemented the larger 4D5. Bore pitch is 93 mm.