4.4 V8 petrol: Jaguar AJ41

With the 2006 facelift, the BMW V8 gave way to Jaguar's 4.4-litre AJ-V8 (AJ41). This is the engine most owners and specialists rate as the most solid of all L322 units, 320,000 km is commonly reported, and the 2007-2009 cars avoid the timing-chain tensioner trouble of the later 5.0. If you want a petrol L322 to keep, this is the one to look for.

Jaguar AJ41 4.4 V8 petrol engine in a Range Rover L322 engine bay

Jaguar AJ41 4.4 V8, the 2006-2009 petrol · engine photo

ENGINE QUICK FACTS

Engine code	Jaguar AJ41
Type	4.4 V8 petrol
Power	227 kW @ 5,750
Torque	440 Nm @ 4,000
0-60	8.7 s
Years	2006-2009
Gearbox	ZF 6HP26
Verdict	The reliable sweet spot

AT A GLANCE Reliability: ●●●●○ the strong one · Performance: ●●●○○ ample, unstressed · Running cost: high (petrol V8)

Strengths	Weaknesses
+ Most reliable L322 engine	– Thirsty (petrol, ~14.9 l/100km)
+ 322k km common with care	– Drivetrain (auto, transfer case) is the weak point, not the engine
+ Smooth, torque-rich AJ-V8	– Bore-liner failures known on some AJ-V8s (rare, neglect-related)

Specifications

Engine code	AJ41 (Jaguar AJ-V8 family)
Configuration	90° V8, petrol, naturally aspirated
Displacement	4,394 cc
Bore × stroke	88.0 mm × 90.3 mm
Block / heads	All-aluminium
Valvetrain	DOHC, 32-valve, variable cam phasing?Variable cam phasing rotates the camshafts slightly as revs change, optimising valve timing for both low-end torque and top-end power.
Management	Torque-based, drive-by-wire?Drive-by-wire means there is no cable from pedal to throttle, a sensor reads the pedal and the ECU opens an electronic throttle, allowing traction and cruise systems to intervene.
Power	approx. 227 kW @ 5,750 rpm
Torque	approx. 440 Nm @ 4,000 rpm
Gearbox	ZF 6HP26 6-speed automatic
Years in L322	2006-2009

Performance & economy

Manufacturer / period figures; real-world economy is typically lower. Petrols were often LPG-converted to cut fuel costs.

0-100 km/h	8.7 sec
Top speed	200 km/h
Economy	~14.9 l/100km (combined)
CO₂ emissions	~352 g/km
Kerb weight	~2,500 kg
Bore × stroke	88.0 mm × 90.3 mm
Power (alt.)	227 kW @ 5,750
Torque	440 Nm @ 4,000

Power vs the L322 range

This engine	227 kW
Range span	130 kW (Td6) to 375 kW (5.0 S/C)

Design & technology

The AJ-V8 is Jaguar's compact all-aluminium V8, also used in the XK, XJ and S-Type and shared with the Discovery 3/4 and Range Rover Sport. In Land Rover form it was given a slightly larger capacity and revised sump for off-road angles. It uses variable cam phasing and a modern torque-based engine management system, giving smooth, responsive delivery with a useful spread of torque.

Performance

227 kW moves the L322 with easy authority, hitting 0-100 km/h in around 8 seconds without ever feeling stressed. It is not as quick as the supercharged cars, but its unburstable nature is the point: this is an engine chosen for longevity rather than headline figures.

Reliability

Specialists consistently call the naturally aspirated 4.4 the engine to have. With regular oil changes and the occasional injector clean, 320,000 km is routine. Owners report the drivetrain behind it (gearbox solenoids, transfer case) failing before the engine does.

Common faults to check

Issue	Symptom & notes
Injector fouling	Rough running; periodic injector clean recommended.
Gearbox solenoids	Not the engine, ZF6 can refuse a shift; often a solenoid, not a rebuild.
Timing chain	Far more robust than the later 5.0; tensioner trouble not typical on 07-09.
Bore-liner wear (rare)	Some AJ-V8s have suffered liner failure if badly neglected; keep oil fresh.
Cooling system	Standard ageing items, thermostat, pump, hoses.

Maintenance notes

Frequent oil changes are the key to the engine's longevity and liner health.
Clean or replace injectors periodically to keep running smooth.
Service the ZF6 gearbox fluid: the drivetrain is what usually limits these cars.
Keep the cooling system fresh given the alloy V8.

Verdict

VERDICT The smart petrol choice and the most bulletproof L322 engine. Buy a well-serviced 2007-2009 car, keep the oil fresh, and it will run for years. Just remember the gearbox/drivetrain, not the engine, is the part to budget for.

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