Hyundai Alpha engines
The Hyundai Alpha engine family was produced in South Korea and China from 1991 to 2011 and was installed on such compact and mid-size models as the Accent, Elantra, Rio and Cerato. Such power units exist in two generations and a version with a CVVT phase regulator.
- First generation
- Second generation
First generation Hyundai Alpha engines
In 1983, the Hyundai concern began a project to create engines to replace the Mitsubishi Orion internal combustion engine. The first prototype was presented in 1985, but the assembly of engines did not begin until 1991, and soon the Hyundai S-Coupe appeared with a 1.5-liter power unit of its own design. It was a classic ICE with multiport fuel injection, a cast-iron cylinder block, an aluminum 12-valve SOHC head with hydraulic lifters, a timing belt drive. Moreover, in addition to the atmospheric version, a modification of this turbocharged engine was proposed.
With the advent of the Accent model in 1994, the Alpha family began to expand rapidly: 1.5-liter units were added to the 1.3-liter units, one of which was equipped with a carburetor. And in 1995, the series was replenished with the most powerful 16-valve DOHC engine with a volume of 1.5 liters, which, in addition to the timing belt, was equipped with a short chain: here it connected a pair of camshafts.
The first line of engines included seven power units of different volume and power:
| G4EA (71 hp / 110 Nm) | Hyundai Accent 1 (X3) |
| G4EH (85 hp / 119 Nm) | Hyundai Getz 1 (TB) |
| G4EB (90 hp / 130 Nm) | Hyundai Accent 2 (LC) |
| G4EK (90 hp / 134 Nm) | Hyundai Scoupe 1 (X2) |
| G4EK-TC (115 hp / 170 Nm) | Hyundai Scoupe 1 (X2) |
| G4EC (102 hp / 134 Nm) | Hyundai Accent 2 (LC) |
| G4ER (91 hp / 130 Nm) | Hyundai Accent 1 (X3) |
Second generation Hyundai Alpha engines
In 2000, the 1.6-liter unit of the Alpha II line debuted on the third generation Elantra and since then the company has abandoned the 12-valve SOHC cylinder head in this series, now only DOHC. The new engine received a number of improvements: a stiffer block and graphite-coated pistons, a crankshaft with eight counterweights instead of four, hydraulic supports instead of rubber, an exhaust manifold appeared, and the intake manifold finally ceased to be a composite one. In 2005, the second family was supplemented by a similar power unit, but with a volume of 1.4 liters.
In 2004, a 1.6-liter unit of the Alpha II series was introduced with a CVVT type phase regulator, which could shift the valve timing of the intake camshaft in a range of about 40 °. Technologies were shared by Daimler-Chrysler as part of the Global Engine Manufacturing Alliance. This made it possible to increase power, reduce fuel consumption and fit into the EURO 4 economy standards.
The second line included only two power units, but one of them in two modifications:
| G4EE (97 hp / 125 Nm) | Kia Rio 2 (JB) |
| G4ED (105 hp / 143 Nm) | Hyundai Getz 1 (TB) |
| G4ED (110 hp / 145 Nm) | Kia Cerato 1 (LD) |
