Difference between revisions of "GM Ultra Engine"

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{{Wikify|date=June 2008}}
'''Ultra''' was the codename for [[General Motors]]' next-generation family of [[DOHC]] [[V8]] engines that was being developed to replace the aging [[Cadillac Northstar engine|Northstar]] as the V8 engine of choice for GM's premium vehicles. There is very little information on the engine's  specifications currently available, however its lowest [[Engine displacement|displacement]] would presumably have been similar to the Northstar's, (with higher-displacement versions probable as well), and it would very likely have incorporated technologies from the [[GM High Feature engine|High Feature]] [[V6]] family, including continuously [[variable valve timing]] on both intake and exhaust ports, as well as provision for [[gasoline direct injection]]. These engines would probably have been adaptable for both [[Longitudinal engine|longitudinal]] and [[Transverse engine|transverse]] applications (the latter would have been used by the rumored V8-powered versions of the [[GM Lambda platform|Lambda]] [[crossover SUV]]s).  
<!-- Image with unknown copyright status removed: [[Image:ShaunVectra004.jpg|thumb|right|A V6 in-situ|{{deletable image-caption|1=Sunday, 20 April 2008}}]] -->
The '''C25XE''' is a [[Family II]], [[General Motors]] engine. It is a 2498 cc (2.5L), [[DOHC]] 24 valve, 'V' configuration, 6 cylinder engine producing 170bhp. It is commonly found in the larger of the GM range of cars - including the [[Opel]]/[[Vauxhall Motors|Vauxhall]] [[Opel Vectra|Vectra]], [[Opel Calibra|Calibra]], [[Vauxhall Cavalier|Cavalier]] and [[Opel Omega|Omega]]. <ref>{{cite web | url = http://www.calibrawiki.com/index.php?title=C25XE | title = Calibra Wiki V6 information | work = Calibra Wiki | accessdate = 2008-04-13}}</ref>


==MSD version==
Despite previously revealing plans to allocate production to the [[Tonawanda]] Engine plant, as of January 2008 GM has cancelled development of this engine. <ref>[http://www.edmunds.com/insideline/do/News/articleId=124170 GM Drops Plans for New DOHC V8 Engine in 2009<!-- Bot generated title -->]</ref>
{{Disputed-section|date=June 2008}} <!-- this was the X25XE -->
A special edition of the engine was worked by [[MSD]] ([[Motor Sports Developments]] based in [[Milton Keynes]] in [[England]], [[UK]]), which includes reprofiled camshafts, giving the engine a boost of 24bhp.{{Fact|date=April 2008}} This engine appeared in the special edition MSD [[Opel Vectra|Vectra]] [[GSi]]'s. <ref>{{cite web | url = http://www.evo.co.uk/carreviews/evolongtermtests/19911/vauxhall_vectra_gsi_v6.html | title = EVO Magazine Vectra GSi review | work = EVO Magazine | accessdate = 2008-04-13}}</ref>


==References==
==References==
{{reflist}}
<references/>


[[Category:GM engines|2.5L]]
==See also==
*[[List of GM engines]]
*[[Cadillac Northstar engine]]
*[[GM High Feature engine]]
 
==External links==
*[http://www.motortrend.com/features/auto_news/2007/112_0702_gm_ultra_v8_engine Motor Trend article]
 
[[Category:GM engines|Ultra]]
 
 
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