Hyundai Alpha II engine
 Alpha engine |
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| Overview | |
| Manufacturer | Hyundai Motor Company |
| Also called | Alpha or Alpha II |
| Combustion chamber | |
| Displacement | G4EH: 1.3 L G4EK/G4FK: 1.5 L G4ED: 1.6 L |
| Cylinder block alloy | Cast Iron |
| Cylinder head alloy | Aluminium |
| Valvetrain | SOHC 12V (G4EH/G4EK) DOHC 16V (G4FK/G4ED) |
| Compression ratio | G4EK: 10.0:1 G4EK Turbo: 7.50:1 G4ED: 10.0:1 |
| Combustion | |
| Fuel system | G4ED: MPFI |
| Fuel type | Unleaded fuel, 87 octane |
| Oil system | Pressure feed |
| Cooling system | Watercooled |
| Output | |
| Power output | G4EH Carbureted: 71 hp (53 kW) G4EH SOHC: 83 hp (62 kW) G4EK: 92 hp (69 kW) G4FK: 101 hp (75 kW) G4ED: 110 hp (82 kW) |
| Torque output | G4EH Carbureted: 81 lb·ft (110 N·m) G4EH SOHC: 86 lb·ft (117 N·m) G4EK: 97 lb·ft (132 N·m) G4FK: 98 lb·ft (133 N·m) G4ED: 106 lb·ft (144 N·m) |
Hyundai's Alpha automobile engine was the first to be designed in Korea. It was a modern SOHC 3-valve straight-4 and was available in turbo and naturally aspirated versions. The first Alpha engine was introduced in 1993 in the Hyundai Scoupe and were available through 2002. Alphas were produced in 1.3 L (1341 cc) and 1.5 L (1495 cc) versions, with a 1.6 L (1599 cc) Alpha II produced from 2005 until 2011 when it was replaced with the Hyundai Gamma engine.
The G4EH is a 1.3 L engine, with a bore and stroke of 71.5 mm and 83.5 mm, respectively. Output was 71 hp (53 kW) at 5500 rpm and 81 lb·ft (110 N·m) at 3000 rpm for the carbureted 1.3 CON version and 83 hp (62 kW) at 5500 rpm and 86 lb·ft (117 N·m) at 3000 rpm for the SOHC 1.3 S.
The G4EK is a 1.5 L engine, with a bore and stroke of 75.5 mm and 83.5 mm, respectively. The SOHC 12 valves 1.5 S generated a respectable but not notable 92 hp (69 kW) at 5500 rpm and 97 lb·ft (132 N·m) at 4000 rpm, although some websites quote the torque rating as being 97 lb·ft (132 N·m) at 2700 rpm. European version makes 90 hp (66 kW) at 5500 rpm and 129 (or 132) Nm at 2900 (or 3000) rpm.
With the addition of a DOHC cylinder head on the G4FK, the power output raised to 101 hp (75 kW) at 5800 rpm and 98 lb·ft (133 N·m) at 3000 rpm.
The turbocharged SOHC Alpha, also introduced in 1993, produced 115 hp (86 kW) at 5500 rpm and 123 lb·ft (167 N·m) at 4500 rpm. This engine was equipped with a Garrett T15 turbocharger.
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Wikipedia