One notable addition is the use of variable valve timing, a feature also shared with Mazda's version of the engine.

It uses sequential fuel injection, has 4 valves per cylinder with VVT, features fracture-split forged powder metal connecting rods and a one-piece cast camshaft and has direct-acting mechanical bucket (DAMB) tappets, these design aspects differentiating the AJ-V6 from the Ford and Mazda versions.

This engine is used in the following vehicles: The AJ25 is a 2.5 L; 152.3 cu in (2,495 cc) version built.

This engine is used in the following vehicles: The AJ30 is a 3.0 L (2,967 cc) version and is the most common, especially considering the Duratec 30.

The Jaguar XF debuted a refined version of the AJ30 with continuously variable cam-phasing and variable geometry air intakes to increase power and broaden the powerband up to its 6800 rpm redline.