View source for Hyundai Alpha engine

{{Infobox automobile engine
| name          = Hyundai Alpha α-series
| image         =
| aka           = 
| manufacturer  = [[Hyundai Motor Company|Hyundai Motors]]
| configuration = [[Straight-four engine|Inline-4]]
| displacement  = {{ubl |{{cvt|1341|cc|L|1|order=flip}}|{{cvt|1399|cc|L|1|order=flip}}|{{cvt|1495|cc|L|1|order=flip}}|{{cvt|1599|cc|L|1|order=flip}} }}
| bore          = {{ubl |71.5 mm (1.3L)|75.5 mm (1.4/1.5L)|76.5mm (1.6L) }}
| stroke        = {{ubl |78.1 mm (1.4L)|83.5 mm (1.3/1.5L)|87 mm (1.6L) }}
| block         = [[Cast Iron]]
| head          = [[Aluminium|Aluminum]] [[alloy]]
| valvetrain    = [[SOHC]]<br/>[[DOHC]]
| fuelsystem    = Carbureted<br/>Electronic Fuel Injection
| fueltype      = [[Gasoline]]
| oilsystem     = [[Wet sump]]
| coolingsystem = [[Liquid cooling|Liquid-cooled]]
| power         = {{cvt|72|-|129|PS|kW hp|0}}
| torque        = {{cvt|11.2|-|18.3|kgm|lbft Nm|0}}
| compression   = 7.5:1–10.0:1
| predecessor   = 
| successor     = [[Hyundai Gamma engine|Gamma]]
| production    = 1992–2011
| idle          = 700-800 ± 100 RPM

}}

The [[Hyundai Motor Company|Hyundai]] Alpha series is a [[Poppet valve|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.<ref>{{Cite journal|last=Lee|first=Hyun Soon|last2=Rho|first2=Il Hyun|date=1989-11-01|title=The Design and Development of the Hyundai Alpha Engine|url=https://www.sae.org/publications/technical-papers/content/891185/|journal=5th International Pacific Conference on Automotive Engineering|language=English|location=Warrendale, PA|publisher=Hyundai Motor Co.}}</ref>

The first Alpha series engine marketed was the 1.5L SOHC 12-[[Poppet valve|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|dual overhead camshaft (DOHC)]], four [[Poppet valve|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&nbsp;mm to 52&nbsp;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.

==Alpha==

==={{anchor|G4EA}} 1.3L CON (G4EA)===
[[File:Hyundai G4EH engine 1.jpg|thumb|right|200px|G4EH in a 1999 Hyundai Accent L]]
The '''G4EA''' is a [[carbureted]] SOHC 12-valve engine with a [[bore (engine)|bore]] and [[stroke (engine)|stroke]] of  71.5&nbsp;mm and 83.5&nbsp;mm respectively. Output is {{cvt|72|PS|kW hp}} at 5,500&nbsp;rpm and {{cvt|11.2|kg.m}} at 3,000&nbsp;rpm. The 1.3&nbsp;L engine was not sold in North America.

;Applications
* 1994–2000 [[Hyundai Accent#First generation (X3; 1994)|Hyundai Accent (X3)]]

==={{anchor|G4EH}} 1.3L EFI (G4EH)===
The '''G4EH''' is a fuel injected version of the Alpha '''G4EA'''. Output is {{cvt|85|PS|kW hp}} at 5,500&nbsp;rpm and {{cvt|12|kg.m|0}} at 3,000&nbsp;rpm. The 1.3&nbsp;L EFI engine was not sold in North America.

;Applications
* 1994–2005 [[Hyundai Accent#First generation (X3; 1994)|Hyundai Accent (X3/LC)]]
* 1996–1999 [[Tatra Beta]]
* 2002–2005 [[Hyundai Getz]]

==={{anchor|G4EK}} 1.5L (G4EK)===
The '''G4EK''' is a fuel injected SOHC 12-valve engine. Output is {{cvt|88|PS|kW hp}} with {{cvt|13.5|kg.m|0}} of torque for the European market and {{cvt|93|PS|kW hp}} with {{cvt|13.5|kg.m|0}} of torque for the North American market.

;Applications
* 1994-1997 [[Hyundai Excel]]
* 1992–1996 [[Hyundai Scoupe]]
* 1994–2005 [[Hyundai Accent#X3|Hyundai Accent (X3/LC)]]
* 1995–1998 [[Hyundai Elantra#J2|Hyundai Elantra (J2)]]

==={{anchor|G4EC|G4FK}} 1.5L (G4EC/G4FK)===
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 {{cvt|102|PS|kW hp}} at 5,800&nbsp;rpm and {{cvt|13.6|kg.m|0}} at 3,000&nbsp;rpm and was later increased to {{cvt|107|PS|kW hp}} at 6,000&nbsp;rpm and {{cvt|13.8|kg.m|0}} at 4,500&nbsp;rpm.

;Applications

* 1998-1999 [[Hyundai Excel]] (G4FK)
* 2000 [[Hyundai Excel]] (G4EC)
* 1999–2005 [[Hyundai Accent#LC|Hyundai Accent (LC)]](G4EC - G4ED)
* 1995–1998 [[Hyundai Elantra#J2|Hyundai Elantra (J2)]]
* 2000–2006 [[Hyundai Elantra#XD|Hyundai Elantra (XD)]]
* 2003–2006 [[Kia Cerato#LD|Kia Cerato (LD)]]
* 2002–2005 [[Hyundai Getz#LD|Hyundai Getz (LD)]]

==={{anchor|G4EKT}} 1.5L Turbo (G4EK Turbo)===
The engine makes {{cvt|115|-|129|PS|kW hp|0}} at 5,500&nbsp;rpm and {{cvt|17|-|18.3|kgm|Nm lbft|0}} of torque at 4,500&nbsp;rpm depending on market.

;Applications
* 1992–1996 [[Hyundai Scoupe]]

==Alpha II==

==={{anchor|G4EE}} 1.4L (G4EE)===
The DOHC 1.4&nbsp;L (1399&nbsp;cc) '''G4EE''' '''Alpha II''' debuted in the 2005 European Kia Rio JB, but wasn't available in North America. It utilized the 75.5&nbsp;mm bore of the original 1.5&nbsp;L engine, but was destroked to 78.1&nbsp;mm. Other design improvements of the 1.6&nbsp;L '''G4ED''' carried over to the 1.4&nbsp;L '''G4EE''', except for CVVT. The engine was noted for its smoother, freer revving nature as compared to the larger 1.6&nbsp;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 {{cvt|95|PS|kW hp}} at 6,000&nbsp;rpm and {{cvt|12.7|kg.m}} at 4,700&nbsp;rpm.

;Applications
* 2005–2010 [[Hyundai Accent#MC|Hyundai Accent (MC)]]
* 2005–2011 [[Hyundai Getz]]
* 2005–2011 [[Kia Rio#JB|Kia Rio (JB)]]

==={{anchor|G4ED}} 1.6L (G4ED)===
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 {{cvt|105-112|PS|kW hp}} at 6,000&nbsp;rpm and {{cvt|14.6-14.9|kg.m|0}} at 4,500&nbsp;rpm.

Post 2005 models feature Hyundai's [[variable valve timing]] technology (CVVT)

Specification:<br/>
Bore: {{cvt|76.5|mm|2}}<br/>
Stroke: {{cvt|87|mm|2}}<br/>
Total displacement: {{cvt|1599|cc}}<br/>
Compression Ratio: 10.0:1<br/>
Firing Order: 1-3-4-2<br/>
Idle RPM: 750± 100<br/>
Ignition Timing at idle speed: BTDC 9° ± 5°/800 rpm<br/>
Size (L x W x H): 465mm x 572mm x 654mm<br/>
Weight (dry): {{cvt|118.2|kg|1}}<br/>
[[Alternator]]: 13.5V/90A<br/>
Starter motor: 12V/0.9KW

;Applications
* 2005–2011 [[Kia Rio#JB|Kia Rio (JB)]]
* 2000–2001 [[Hyundai Tiburon#RD|Hyundai Coupe (RD)]]
* 2000–2006 [[Hyundai Elantra#XD|Hyundai Elantra (XD)]]
* 2001–2008 [[Hyundai Tiburon#GK|Hyundai Coupe (GK)]]
* 2001–2010 [[Hyundai Accent#LC|Hyundai Accent (LC/MC)]]
* 2003–2006 [[Kia Cerato#LD|Kia Cerato (LD)]]
* 2002-2010 [[Hyundai Matrix#FC|Hyundai Matrix (FC)]]
* 2003–2006 [[Hyundai Accent#X3|Kia Qianlima]]
* 2005–2011 [[Hyundai Getz]]
* 2008–2020 [[Hyundai Elantra#HD|Hyundai Elantra Yuedong]] (Chinese market only)

==See also==
* [[List of Hyundai engines]]

==References==
{{Reflist}}

==External links==
{{commons cat}}
*[http://www.carfolio.com/specifications/models/car/?car=34320 1992 Hyundai S-Coupé LS specifications - Carfolio.com]
*[http://www.carfolio.com/specifications/models/car/?car=34276 1992 Hyundai S-Coupé GT specifications - Carfolio.com]
*[https://www.autoserviceworld.com/carsmagazine/hyundai-1-6-alpha/ Hyundai 1.6L Alpha Engine]
*[https://www.hyundainews.com/en-us/releases/1296 Hyundai Accent History]
*[https://www.hyundainews.com/en-us/releases/1035 2006 Hyundai Accent Press Release]

{{Hyundai engine timeline}}

{{DEFAULTSORT:Hyundai Alpha Engine}}
[[Category:Hyundai engines|Alpha]]
[[Category:1992 introductions]]
[[Category:Straight-four engines]]