Science Fair Project Encyclopedia
Hyundai Alpha engine
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.
The G4EH is a 1.3 L engine. Output was 71 hp (53 kW) at 5500 RPM and 81 ft.lbf (110 Nm) at 3000 RPM for the carbureted 1.3 CON version and 83 hp (62 kW) at 5500 RPM and 86 ft.lbf (117 Nm) at 3000 RPM for the SOHC 1.3 S.
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 Nm) at 4000 RPM. DOHC on the Alpha II pushed output to 101 hp (75 kW) at 5800 RPM and 98 ft.lbf (133 Nm) at 3000 RPM.
The turbocharged Alpha, also introduced in 1993, produced 115 hp (86 kW) at 5500 RPM and 123 ft.lbf (167 Nm) at 4500 RPM.
The alpha family continued at least through 2005 in Hyundai's Accent economy car. The Alpha II was enlarged to 1.6 L (1595 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 Nm) 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 .
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