| Mitsubishi Astron engine | |
|---|---|
.JPG) Mitsubishi G54B engine | |
| Overview | |
| Manufacturer | Mitsubishi Motors |
| Also called | 4G5/4D5 |
| Production | 1972–2023 |
| Layout | |
| Configuration | Four-cylinder |
| Displacement | 1.9–2.6 L (1,850–2,555 cc) |
| Cylinder bore | 84 mm (3.31 in) 88 mm (3.46 in) 91.1 mm (3.59 in) |
| Piston stroke | 90 mm (3.54 in) 95 mm (3.74 in) 98 mm (3.86 in) |
| Cylinder block material | Cast-iron[1] |
| Cylinder head material | aluminium[1] |
| Valvetrain | |
| Compression ratio | 8.8:1-21.0:1 |
| Combustion | |
| Turbocharger | TD04, TD05 or TF035HL2 variable geometry with intercooler (on some versions) |
| Fuel system | Carburetor Multi-point fuel injection Throttle-body fuel injection Indirect injection Common rail Direct Injection |
| Fuel type | Gasoline, Diesel |
| Cooling system | Water-cooled |
| Output | |
| Power output | 46–178 PS (34–131 kW) |
| Torque output | 137–400 N⋅m (101–295 lb⋅ft) |
| Chronology | |
| Successor | Sirius 4G64 (Gasoline engine) |
The Mitsubishi Astron or 4G5/4D5 engine, is a series of straight-four internal combustion engines first built by Mitsubishi Motors in 1972. Engine displacement ranged from 1.8 to 2.6 litres, making it one of the largest four-cylinder engines of its time.
- ^ a b Mike Bumbeck (2018-09-23). "Astron Goes Onward". Hemmings.