Jaguar Range Rover AJ-8 Engine

The Jaguar Land Rover AJ-8 Gen 3 engine is a DOHC motor used in many of Jaguar and Range Rover motor vehicles. An all new direct-injection 5.0 L engine family came fitted with a naturally aspirated or supercharged motor which included  an all new cylinder block which were introduced in late 2009. The engine featured: spray-guided direct-injection, continuously variable intake and exhaust camshaft timing.

It was the fourth new engine type in the history of the company. In 1997 it replaced designs previously available on Jaguar cars; straight-6 AJ-6 and the Jag V12 motor which were the first and second choice of engines for Jaguar for many of their production years.

The AJ-V8 engine is available in displacements ranging from 3.2 L to 5.0 L and was also available as a supercharged version in 4.2 litre and the new upgraded 5.0 litre engines.

The 5.0 litre supercharged Jaguar engine features a cylinder block which has 4-bolt main bearing caps with two side locking bolts, larger charge coolers, twin vortices Eaton supercharger, revised direct injection cylinder heads, 92.5 mm Kolenschmidt pistons, 45 degree fracture slit powder forged connecting rods and a one-piece cast camshaft. The naturally aspirated engines feature cam profile switching and variable track length reinforced plastic inlet manifold.

The Ford Motor Company (FoMoCo) used these compact AJ-V8 engines in other motor vehicles such as the Lincoln LS, Ford Thunderbird 2002–2005 models and was also fitted to several Land Rover models including the Range Rover Sport and Land Rover Discovery HSE.

In 2013 Jaguar F-Type 5.0L supercharged V8 was also fitted to the Range Rover Sport SVR as a performance upgrade with a power output of 550 HP and torque output of 502 lb.ft. The 2010 model year engine conforms to EU5 and ULEV2 emissions regulations and the engine is controlled by Denso's Generation 1.6 Engine Management System.

The earlier engines originally used a two-state variable valve timing system to advance and retard the intake cam timing by 30°. The newer engines such as the 5.0 L engine use a more sophisticated system which can vary the intake camshaft timing incrementally up to 48°.

The cylinders were coated with Nikasil rather than the more common cast iron sleeves and cast Alusil blocks. High sulphur present in fuel in South Africa up until 1998 which reacted with the Nikasil causing it to ‘pit’ and eventually ‘flake off’ causing ring and/or piston to bore damage which often led to catastrophic engine failure.

CLICK HERE for more information on Jaguar Land Rover, Jaguar F-Type, Range Rover Sport reconditioned AJ-8 supercharged engines and upgrades. Contact Nick on 082-4400664 today at 'V8 ENGINE' for expert advice.