Editing Jaguar AJ-V8 engine (section)

== 4.0 L {{Anchor|AJ26|AJ27}} ==

The {{cvt|3996|cc|L|1|order=flip}} '''AJ26''' engine was introduced in 1996. The number "26" comes from 12+6+8 (cylinders), because when the first ideas were sketched, a family of 6-, 8- and 12-cylinder engines was contemplated, although only the 8-cylinder version was produced. It has a square {{cvt|86|mm|in|2}} bore and stroke. It was updated in 1998 as the '''AJ27''' with continuously variable valve timing. The AJ-V8 was updated again in 2000 as the '''AJ28'''. The [[naturally aspirated]] version produces {{cvt|290|hp|kW PS|0}} <!-- EU or SAE? --> in the 2000–2002 XK8.

Vehicles using this engine:

* AJ26
** 1997–1998 [[Jaguar XJ (X308)|Jaguar XJ8]]
** 1997–1998 [[Jaguar XK (X100)|Jaguar XK8]]
** 1997–1998 [[Jaguar XJ (X308)|Daimler V8]]
* AJ27
** 1999–2003 [[Jaguar XJ (X308)|Jaguar XJ8]]
** 1999–2003 [[Jaguar XK (X100)|Jaguar XK8]]
** 1999–2003 [[Jaguar XJ (X308)|Daimler V8]]
* AJ28
** 2000–2002 [[Jaguar S-Type (1999)|Jaguar S-Type]] {{cvt|281|hp|kW PS|0}}, {{cvt|287|lbft|Nm|0}}

=== Supercharged {{Anchor|AJ26S|AJ27S}} ===

The supercharged version of the [[#AJ26|AJ26]] is used in the high-performance ''R'' versions of Jaguar's cars. The engine was updated with '''AJ27''' specifications for 2000. It produces {{cvt|370|hp|kW PS|0}} and {{cvt|387|lbft|Nm|0}} with the help of an Eaton supercharger (modified Roots-blower). The supercharged engine did not use variable cam timing as the normal benefits of improved volumetric efficiency are not noticeable on a boosted engine.

Vehicles using the supercharged version include:
* AJ26S
** 1998–1999 [[Jaguar XJ (X308)|Jaguar XJR]]
** 1998–1999 [[Jaguar XK (X100)|Jaguar XKR]]
** 1998–1999 [[Jaguar XJ (X308)|Daimler Super V8]]
* AJ27S
** 2000–2003 [[Jaguar XJ (X308)|Jaguar XJR]]
** 2000–2003 [[Jaguar XK (X100)|Jaguar XKR]]
** 2000–2003 [[Jaguar XJ (X308)|Daimler Super V8]]