From 2003 to 2009, the company produced the 4.2-liter Jaguar AJ34 gasoline engine, which was fitted to popular models like the XK and XJ, as well as the S-Type and its replacement XF. A motor for Land Rover SUVs under the AJ41 index was developed based on this unit.
AJ-V8 series: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, and 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 |
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 unreliable VVT phase regulators are this engine’s weak point;
Keep an eye on the cooling system because the aluminum motor is prone to overheating;
High oil consumption results from the crankcase ventilation valve clogging rather quickly;
Cleaning the throttle assembly should be the first step in determining the cause of floating engine speeds; burst pipes frequently result in antifreeze leaks during extended runs.