The Jaguar AJ34 4.2-liter gasoline engine was produced by the company from 2003 to 2009 and was installed on such popular models as the XK and XJ, as well as the S-Type and its successor XF. On the basis of this unit, a motor was created for Land Rover SUVs under the AJ41 index.
AJ-V8 family: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, AJ133S.
Specifications
| Production years | 2003-2009 |
| Displacement, cc | 4196 |
| Fuel system | distributed injection |
| Power output, hp | 305 |
| Torque output, Nm | 420 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 90.3 |
| Compression ratio | 11.0 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | VVT at the intake |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.0 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Jaguar XK 2007) — city — highway — combined |
17.1 8.1 11.3 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 180 |
The engine was installed on:
- Jaguar S-Type 1 (X200) in 2004 – 2007;
- Jaguar XF 1 (X250) in 2008 – 2009;
- Jaguar XJ 7 (X350) in 2003 – 2009;
- Jaguar XK 2 (X150) in 2006 – 2009.
Disadvantages of the Jaguar AJ34 engine
- The weak point of this engine is the unreliable phase regulators of the VVT type;
- The motor is aluminum and is afraid of overheating, so keep an eye on the cooling system;
- The crankcase ventilation valve clogs rather quickly, which leads to high oil consumption;
- The search for the culprit of floating engine speeds should start with cleaning the throttle assembly;
- On long runs, antifreeze leaks often occur due to burst pipes.
Frequently asked questions about the Jaguar AJ34
How much power does the Jaguar AJ34 make?
The Jaguar AJ34 develops 305 hp and 420 Nm of torque.
How much oil does the Jaguar AJ34 take and which one?
Engine oil capacity: 7.0 liters. Recommended oil: 5W-30.
Does the Jaguar AJ34 have a timing belt or chain?
The Jaguar AJ34 uses a timing chain.
Is the Jaguar AJ34 turbocharged?
No, the Jaguar AJ34 is naturally aspirated.
Does the Jaguar AJ34 need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Jaguar AJ34 last?
The typical lifespan of the Jaguar AJ34 is ~350 000 km with proper maintenance.
What is the fuel consumption of the Jaguar AJ34?
Jaguar XK 2007: city 17.1, highway 8.1, combined 11.3 L/100 km.
What cars was the Jaguar AJ34 installed on?
Jaguar S-Type 1 (X200) in 2004 - 2007; Jaguar XF 1 (X250) in 2008 - 2009; Jaguar XJ 7 (X350) in 2003 - 2009; Jaguar XK 2 (X150) in 2006 - 2009.
What are the common problems of the Jaguar AJ34?
The weak point of this engine is the unreliable phase regulators of the VVT type. The motor is aluminum and is afraid of overheating, so keep an eye on the cooling system. All known problems.
