Editing Hyundai Sigma engine

{{Unreferenced|date=December 2009}}
{{Infobox automobile engine
|name=<big>'''Σ engine'''</big><br/><sup>[[File:Hyundai Motor Company logo.svg|70px]]{{spaces|2}}Sigma engine</sup>
|manufacturer=[[Hyundai Motor Company]]
|production=1989–2007
|configuration=[[V6 engine|V6]]
|block=Cast iron
|head=Aluminum
|valvetrain=[[SOHC]], [[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]]
|fueltype=[[Petrol engine|Gasoline]]<br/>[[Autogas|LPG]]
|fuelsystem=[[Multi-port fuel injection]]
|coolingsystem=[[Radiator (engine cooling)|Water-cooled]]
|displacement={{cvt|2497|cc|L cuin|1|order=flip}}<br/>{{cvt|2972|cc|L cuin|1|order=flip}}<br/>{{cvt|3497|cc|L cuin|1|order=flip}}
|bore={{cvt|83.5|mm|in|2}}<br/>{{cvt|91.1|mm|in|2}}<br/>{{cvt|93|mm|in|2}}
|stroke={{cvt|76|mm|in|2}}<br/>{{cvt|85.8|mm|in|2}}
|power={{cvt|135-220|PS|kW hp|0}}
|torque={{cvt|20.8-32|kgm|0}}
|successor=[[Hyundai Lambda engine]]
}}
The '''Hyundai Sigma engine''' is what [[Hyundai Motor Company]] called the [[Mitsubishi 6G7 engine]] when manufactured in South Korea. It is a series of [[V6]] [[piston engine]]s. The Sigma engine family began life with the simple '''V6''' name. Displacement ranges from {{cvt|2497|to|3497|cc|L|1|order=flip}}.

== {{Anchor|G6AV}} 2.5L (G6AV)==
The [[DOHC]] '''G6AV''' (also called the '''2.5 D''', "D" for DOHC) is the small {{cvt|2497|cc|L cuin|1}} version. Bore is {{cvt|83.5|mm|in|2}} and stroke is shared with the {{cvt|2972|cc|L|1|order=flip}} at {{cvt|76|mm|in|2}}. Output is {{cvt|162|-|173|PS|kW hp|0}} at 6,000&nbsp;rpm and {{cvt|20.8|-|22.4|kgm|0}} at 4,500&nbsp;rpm.

===Applications===
*[[Hyundai Dynasty]] (1997–2005)
*[[Hyundai Grandeur#LX|Hyundai Grandeur (LX)]] (1995–1998)
*[[Hyundai Marcia]] (1995–1998)

== {{Anchor|G6AT|G6CT}} 3.0L (G6AT/G6CT)==
The [[DOHC]] '''G6AT''' and '''G6CT''' (also called the '''3.0 D''', "D" for DOHC) both displace {{cvt|2972|cc|L cuin|1}}. They share the 2.5's {{cvt|76|mm|in|2}} stroke but use a larger {{cvt|91.1|mm|in|2}} bore. Output for the older G6AT is {{cvt|185|-|205|PS|kW hp|0}} at 6,000&nbsp;rpm and {{cvt|24.6|-|27.1|kgm|0}} at 4,000–4,500&nbsp;rpm, while the G6CT produces {{cvt|187|-|196|PS|kW hp|0}} at 5,500–6,000&nbsp;rpm and {{cvt|26.5|-|27.2|kgm|0}} at 3,500–4,000&nbsp;rpm.

The older [[SOHC]] '''G6AT''' '''3.0 S''' produces just {{cvt|141|-|164|PS|kW hp|0}} at 5,000&nbsp;rpm and {{cvt|22.9|-|24.5|kgm|0}} at 2,500–3,000&nbsp;rpm.

===Applications===
* [[Hyundai Dynasty]] (1996–2005)
* [[Hyundai Equus#LZ|Hyundai Equus (LZ)]] (1999–2005)
* [[Hyundai Galloper]] (1994–2000)
* [[Hyundai Grandeur]] (1989–2005)
* [[Hyundai Sonata#Y3|Hyundai Sonata (Y3)]] (1990–1998)
* [[Hyundai Starex#A1|Hyundai Starex (A1)]] (1999–2003)
* [[Hyundai_Grandeur#XG|Hyundai XG300]] (2001)
* [[Kia Opirus]] (2003–2006)

== {{Anchor|L6AT}} 3.0L LPG (L6AT)==
The '''L6AT''' displace {{cvt|2972|cc|L cuin|1}}. They share the 2.5's {{cvt|76|mm|in|2}} stroke but use a larger {{cvt|91.1|mm|in|2}} bore. Output is {{cvt|135|PS|kW hp|0}} at 4,500&nbsp;rpm and {{cvt|23|-|24|kgm|0}} at 2,500&nbsp;rpm.

===Applications===
* [[Hyundai Galloper]] (1998–2003)
* [[Hyundai Libero]] (2000–2007)
* [[Hyundai Starex#A1|Hyundai Starex (A1)]] (1999–2003)

== {{Anchor|G6AU|G6CU}} 3.5L (G6AU/G6CU)==
The '''G6AU''' and '''G6CU''' (both also called the '''3.5 D ''') are the large {{cvt|3497|cc|L cuin|1}} versions of the Sigma engine. Bore and stroke are both larger at {{cvt|93x85.8|mm|in|2}}, respectively. Output is {{cvt|203|-|225|PS|kW hp|0}} at 5,500&nbsp;rpm and {{cvt|29.6|-|31.8|kgm|0}} at 4,000&nbsp;rpm for the older G6AU and {{cvt|195|-|220|PS|kW hp|0}} at 5,500–6,000&nbsp;rpm and {{cvt|30|-|32|kgm|0}} at 3,500&nbsp;rpm for the newer G6CU.

The 3.5 D has a cast iron engine block and aluminum DOHC cylinder heads. It uses [[Multi-port fuel injection]], has [[Multi-valve#Four valves|4 valves per cylinder]], and features [[forged steel]] [[connecting rod]]s. It is designed to run on "regular" unleaded gasoline rather than the premium fuel used in many other high-output V6 engines.

The [[United States domestic market|US-market]] version produces {{cvt|197|PS|kW hp|0|}} at 5,500&nbsp;rpm with {{cvt|30.3|kgm|0}} of torque at 3,500&nbsp;rpm. It was introduced with the [[Kia Sedona]] [[minivan]] in 2001.

===Applications===
* [[Hyundai Dynasty]] (1996–1999)
* [[Hyundai Equus#LZ|Hyundai Equus (LZ)]] (1999–2005)
* [[Hyundai Grandeur]] (1994–1996, 2002–2005)
* [[Hyundai Santa Fe#SM|Hyundai Santa Fe (SM)]] (2002–2005)
* [[Hyundai Terracan]] (2001–2007)
* [[Hyundai XG350#XG|Hyundai XG350 (XG)]] (2002–2005)
* [[Kia Opirus]] (2003–2006)
* [[Kia Carnival#KV-II|Kia Sedona (GQ)]] (2001–2005)
* [[Kia Sorento#BL|Kia Sorento (BL)]] (2003–2006)

==See also==
* [[List of Hyundai engines]]
* [[Mitsubishi 6G7 engine]]

{{Hyundai engine timeline}}

{{DEFAULTSORT:Hyundai Sigma Engine}}
[[Category:Hyundai engines|Sigma]]
[[Category:V6 engines]]
[[Category:Gasoline engines by model]]