The Jaguar AJ-V6 engine is based on the Ford Duratec V6 engine. (The Duratec V6 was originally a Porsche design, purchased by Ford with Cosworth finishing the engineering to suit Ford's needs.) One notable addition is the use of variable valve timing, a feature also shared with Mazda's version of the engine. It is available in , and displacements. Jaguar's AJ-V6 engine has an aluminium engine block and Jaguar designed aluminium DOHC cylinder heads. 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. AJ20 The AJ20 version has an bore and stroke. Although it displaces nearly , it is marketed as a "2.0". It produces and . The compression ratio is 10.75:1. This engine is used in the following vehicles: Jaguar X-Type 2.0 (UK) AJ25 The AJ25 is a version built. It shares the 2.1's bore and is stroked to , the same as the . It delivers at 6800 rpm with of torque at 3000 rpm from 10.3:1 compression. This engine is used in the following vehicles: 2001-2009 Jaguar X-Type 2.5, and 2002-2006 Jaguar S-Type 2.5 (UK), and AJ30 The AJ30 is a version and is the most common, especially considering the Duratec 30. It has an bore and shares the 2.5's stroke. In the X-Type, it produces and . 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. This engine is used in the following vehicles: 2000-2008 Jaguar S-Type, and 2002-2009 Jaguar X-Type, and 2003-2010 Jaguar XJ, 237 hp (177 kW; 240 PS) and 2008-2011 Jaguar XF and 2000-2006 Lincoln LS See also Ford Duratec V6 engine Jaguar AJ-V8 engine References AJ-V6 Gasoline engines by model V6 engines