Mitsubishi Sirius engine

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.