Hyundai Alpha engine

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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 lasted through 2002. Alphas were produced in 1.3 L (1341 cc) and 1.5 L (1495 cc) versions, with a 1.6 L Alpha II produced later. The 1.5 came first, with a 75.5 mm bore and 83.5 mm stroke. The 1.3 was de-bored to 71.5 mm bore. All Alpha engines have been discontinued.

1 1.3
2 1.5
3 1.6
- 3.1 Applications
4 See also

[edit] 1.3

The G4EH is a 1.3 L engine. Output was 71 hp (53 kW) at 5500 rpm and 81 ft·lbf (110 N·m) at 3000 rpm for the carbureted 1.3 CON version and 83 hp (62 kW) at 5500 rpm and 86 ft·lbf (117 N·m) at 3000 rpm for the SOHC 1.3 S.

[edit] 1.5

The G4EK is a 1.5 L engine. The SOHC 1.5 S generated a respectable but not notable 92 hp (69 kW) at 5500 rpm and 97 ft·lbf (132 N·m) at 4000 rpm, although some websites quote the torque rating as being 97 ft·lbf (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 (try it and you'll see it's true).

DOHC on the Alpha II pushed output to 101 hp (75 kW) at 5800 rpm and 98 ft·lbf (133 N·m) at 3000 rpm.

The turbocharged Alpha, also introduced in 1993, produced 115 hp (86 kW) at 5500 rpm and 123 ft·lbf (167 N·m) at 4500 rpm.

[edit] 1.6

The alpha family continued at least through 2005 in Hyundai's Accent economy car. The G4ED Alpha II was enlarged to 1.6 L (1599 cc) thanks to a 76.5 mm bore and 87 mm stroke. A 10:1 compression ratio produced 104 hp (78 kW) at 5800 rpm with 106 ft·lbf (144 N·m) of torque at 3000 rpm.

The Alpha II has a cast iron engine block and aluminum DOHC cylinder heads with 4 valves per cylinder. It uses MFI fuel injection and features forged steel connecting rods. The Alpha engine family is produced in Ulsan, South Korea.

CVVT Alpha II was introduced in the 2006 Accent. Power output also increased to 112 PS and 108 lb·ft (146 N·m) torque. It has COP (Coil-On-Plug) ignition, graphite-coated pistons and new cylinder block design to increase strength. Throttle body bore has increased from 48 to 52 mm. Engine and automatic transmission control is now integrated into one module and the PCM is located in the engine compartment. It is ULEV-certified in all 50 states.