Editing Jaguar AJ-V8 engine (section)

{{Use dmy dates|date=January 2018}}
{{Use British English|date=January 2018}}
{{Refimprove|date=September 2009}}
{{Infobox automobile engine
| name = Jaguar AJ-V8
| image = 2001 Jaguar S-Type AJ-V8 engine.JPG
| manufacturer = 1996–2012 [[Jaguar Cars]]<br/>2013–present [[Jaguar Land Rover]]
| production = 1996–2010 <br />2005-2017 (AM05/AM14)<br />2010–2012 (AJ133/AJ133S)<br />2013-present (AJ126/AJ133S)
| configuration = 90° [[V8 engine|V8]]<br />90° [[V6 engine|V6]]
| predecessor = [[Jaguar AJ6 engine#AJ16|Jaguar AJ16]]<br />[[Jaguar V12 engine|Jaguar V12]]<br />[[Rover V8 engine|Rover V8]]<br/>[[BMW M62]]
| successor = [[Ingenium engine family|Ingenium AJ300]]<br/>[[BMW N63]] (Range Rover)
| block = [[Aluminum alloy]]
| head = Aluminum alloy
| valvetrain = [[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]] with [[Variable Valve Timing|VVT]]
| fueltype = [[Petrol engine|Petrol]]
| fuelsystem = [[Multi-port fuel injection]] <br /> (1996-2010)<br /> [[Gasoline direct injection|Direct injection]] <br /> (2010-present)
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| management = [[Denso]] (1996-2012) <br />[[Robert Bosch GmbH|Bosch]] <br />(2013-present)
| supercharger = Eaton M112 with [[intercooler]] <br /> (1996-2010)<br />[[TVS Supercharger|TVS]] with [[intercooler]] (2010-present)
| compression = 9.5:1<br/>10.5:1<br/>11.5:1
| displacement = {{cvt|2995|cc|L|1|order=flip}} ([[V6 engine|V6]])<br/>{{cvt|3473|cc|L|1|order=flip}}<br/>{{cvt|3934|cc|L|1|order=flip}}<br/>{{cvt|3996|cc|L|1|order=flip}}<br/>{{cvt|4196|cc|L|1|order=flip}}<br/>{{cvt|4280|cc|L|1|order=flip}}<br/>{{cvt|4394|cc|L|1|order=flip}}<br/>{{cvt|4735|cc|L|1|order=flip}}<br/>{{cvt|5000|cc|L|1|order=flip}}
| bore = {{cvt|84.5|mm|in|2}} (V6)<br/>{{cvt|86|mm|in|2}}<br/>{{cvt|88|mm|in|2}}<br/>{{cvt|89|mm|in}}<br/>{{cvt|91|mm|in|2}}<br/>{{cvt|92.5|mm|in|2}}
| stroke = {{cvt|86|mm|in|2}}<br/>{{cvt|70|mm|in|2}}<br/>{{cvt|76.5|mm|in|2}}<br/>{{cvt|85|mm|in|2}}<br/>{{cvt|89|mm|in}} (V6)<br/>{{cvt|90.3|mm|in|2}}<br/>{{cvt|91|mm|in|2}}<br/>{{cvt|93|mm|in|2}}
| power = {{cvt|240-592|hp|kW PS|0}}
| torque = {{cvt|233-516|lbft|Nm|0}}
}}

The [[Jaguar Cars|Jaguar]] '''AJ-V8''' is a compact [[DOHC]] [[V8 engine|V8]] [[piston engine]] used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. It was an in house design with work beginning before Ford's purchase of the company. In 1997 it replaced both designs previously available on Jaguar cars: the [[straight-6]] [[Jaguar AJ6 engine]] (or rather its AJ16 variant), and the [[Jaguar V12 engine]]. It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the [[Jaguar AJ-V6 engine]] was added to the list. The AJ-V8 is available in displacements ranging from 3.2L to 5.0L, and a [[supercharged]] version is also produced. [[Ford Motor Company]] also used this engine in other cars, including the [[Lincoln LS]] and the 2002–2005 [[Ford Thunderbird]], as well as in several [[Land Rover]]s, and the [[Aston Martin V8 Vantage (2005)|Aston Martin V8 Vantage]].

The AJ-V8 was designed to use [[Nikasil]]-coated cylinders rather than the more-common iron [[cylinder liner]]s. However, like the [[BMW M60]], high-sulphur fuel reacted with the Nikasil coating and caused engine failures. Jaguar replaced affected engines, and has used conventional cast-iron linings ever since.

The engine originally used a two-state [[Variable Valve Timing]] system to switch the intake cam timing by 30°. Newer variants use a more sophisticated system which can vary intake timing incrementally up to 48°. The Lincoln version was made in the United States.

Other engine features include fracture-split forged powder metal [[connecting rod]]s, a special one-piece cast camshaft, and reinforced plastic [[intake manifold]].

The AJ-V8 was on the [[Ward's 10 Best Engines]] list for 2000.

Ford ceased production of the AJ-V8 engine in September 2020 when it closed the Bridgend Plant.<ref>{{Cite news|last=Jolly|first=Jasper|url=https://www.theguardian.com/business/2019/jun/06/ford-to-close-bridgend-factory-in-september-2020|title=Ford to close Bridgend factory by September 2020|date=2019-06-06|work=The Guardian|access-date=2020-03-11|language=en-GB|issn=0261-3077}}</ref>  However, in August 2020 JLR was able to take over production means for the AJ-V8.<ref>{{Cite web|title=Jaguar Land Rover to continue AJ V8 production in-house|url=https://www.autocar.co.uk/car-news/industry/jaguar-land-rover-continue-aj-v8-production-house|access-date=2020-12-28|website=Autocar|language=en}}</ref>