From 2006 to 2009, the 4.2-liter Jaguar AJ34S, also known as the 4.2 Supercharged engine, was manufactured. It was fitted to the XK model’s charged variant under the XKR index and for an additional year on the XFR. VVT phase regulators set this motor apart as an upgraded version of the AJ33S.
AJ-V8 series: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, and AJ133S.
Specifications
| Production years | 2006-2009 |
| Displacement, cc | 4196 |
| Fuel system | distributed injection |
| Power output, hp | 420 |
| Torque output, Nm | 560 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 90.3 |
| Compression ratio | 9.1 |
| Features | intercooler |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | VVT at the intake |
| Turbocharging | Eaton M112 |
| 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 XKR 2008) — city — highway — combined |
19.1 8.6 12.3 |
| Engine lifespan, km | ~300 000 |
The engine was installed on:
- Jaguar XF 1 (X250) in 2008 – 2009;
- Jaguar XK 2 (X150) in 2006 – 2009.
Disadvantages of the Jaguar AJ34S engine
Keep the radiator clean because the aluminum motor is terrified of overheating; VVT phase regulators have a finite supply, sometimes less than 100,000 kilometers;
Rapid clogging of the crankcase ventilation valve causes high oil consumption right away;
The fuel injectors and throttle assembly need to be cleaned on a regular basis because burst pipes frequently cause antifreeze leaks at high mileage.