| Hyundai Alpha α-series | |
| Manufacturer: | Hyundai Motors |
| Type: | Inline-4 |
| Displacement: | 1341cc 1399cc 1495cc 1599cc |
| Bore: | 71.5 mm (1.3L) 75.5 mm (1.4/1.5L) 76.5mm (1.6L) |
| Stroke: | 78.1 mm (1.4L) 83.5 mm (1.3/1.5L) 87 mm (1.6L) |
| Block: | Cast Iron |
| Head: | Aluminum alloy |
| Valvetrain: | SOHC DOHC |
| Fuelsystem: | Carbureted Electronic Fuel Injection |
| Fueltype: | Gasoline |
| Oilsystem: | Wet sump |
| Coolingsystem: | Liquid-cooled |
| Power: | 72- |
| Torque: | 11.2- |
| Compression: | 7.5:1–10.0:1 |
| Successor: | Gamma |
| Production: | 1992–2011 |
| Idle: | 700-800 ± 100 RPM |
The Hyundai Alpha series is a multi-valve gasoline inline four-cylinder engine family comprising 1.3, 1.4, 1.5, and 1.6 L naturally aspirated versions and a 1.5 L turbocharged version. Introduced in 1992, this was Hyundai's first engine designed entirely in-house and was the first indigenous South Korean engine design. Design objectives were to provide high performance and good fuel economy with excellent durability at a reasonable cost.[1]
The first Alpha series engine marketed was the 1.5L SOHC 12-valve inline-four. It was offered in naturally aspirated and turbo versions and debuted in the 1992 Hyundai Scoupe. A 1.3L version debuted later in the Hyundai Accent.
A dual overhead camshaft (DOHC), four valve per cylinder version debuted in the 1996 Hyundai Accent GT.
A strengthened block, an eight-counterweight crankshaft, and hydraulic engine mounts were added from 2000-onward to reduce NVH (noise, vibration and harshness).
The 1.6L Alpha II debuted in 2001, eventually replacing the 1.3L and 1.5L. It was further revised in 2005 with a 1.4L version also debuting. Notable improvements over the Alpha included a DOHC 16-valve cylinder head, graphite-coated piston skirts, a strengthened cylinder block, ribbed aluminum oil pan, coil-on-plug ignition, an enlarged throttle body (increased from 48 mm to 52 mm), a revised PCM (powertrain control module), simplified and shortened intake ducting, a revised intake manifold, and a returnless fuel system. These improvements further reduced NVH and emissions, with the 1.6L version becoming ULEV-certified in all 50 U.S. states.
The G4EA is a carbureted SOHC 12-valve engine with a bore and stroke of 71.5 mm and 83.5 mm respectively. Output is 72PS at 5,500 rpm and 11.2kg.m at 3,000 rpm. The 1.3 L engine was not sold in North America.
The G4EH is a fuel injected version of the Alpha G4EA. Output is 85PS at 5,500 rpm and 12kg.m at 3,000 rpm. The 1.3 L EFI engine was not sold in North America.
The G4EK is a fuel injected SOHC 12-valve engine. Output is 88PS with 13.5kg.m of torque for the European market and 93PS with 13.5kg.m of torque for the North American market.
The G4EC/G4FK is an upgraded version of the Alpha G4EK with the addition of a DOHC cylinder head and 16 valves. Power output is 102PS at 5,800 rpm and 13.6kg.m at 3,000 rpm and was later increased to 107PS at 6,000 rpm and 13.8kg.m at 4,500 rpm.
The engine makes at 5,500 rpm and of torque at 4,500 rpm depending on market.
The DOHC 1.4 L (1399 cc) G4EE Alpha II debuted in the 2005 European Kia Rio JB, but wasn't available in North America. It utilized the 75.5 mm bore of the original 1.5 L engine, but was destroked to 78.1 mm. Other design improvements of the 1.6 L G4ED carried over to the 1.4 L G4EE, except for CVVT. The engine was noted for its smoother, freer revving nature as compared to the larger 1.6 L due to its squarer bore:stroke dimensions. It also produced slightly improved fuel consumption at the expense of overall power output.
Power output is rated 95PS at 6,000 rpm and 12.7kg.m at 4,700 rpm.
The Hyundai Alpha-II G4ED is an in-line 4, spark-ignition 4-stroke, dual overhead camshaft (DOHC) with 16 valves. The engine's advertised power is Output is NaNPS at 6,000 rpm and NaNkg.m at 4,500 rpm.
Post 2005 models feature Hyundai's variable valve timing technology (CVVT)
Specification:
Bore:
Stroke:
Total displacement:
Compression Ratio: 10.0:1
Firing Order: 1-3-4-2
Idle RPM: 750± 100
Ignition Timing at idle speed: BTDC 9° ± 5°/800 rpm
Size (L x W x H): 465mm x 572mm x 654mm
Weight (dry):
Alternator
13.5V/90A
Starter motor: 12V/0.9KW