The 4.2-liter petrol engine Jaguar AJ34 was produced by the company from 2003 to 2009 and installed in popular models such as XK and XJ, as well as S-Type and replaced by XF. Based on this power unit, an engine for Land Rover off-road vehicles was created, designated AJ41. The following engines belong to the AJ-V8 series: AJ28, AJ33, AJ33S, AJ34S, AJ126, AJ133, and AJ133S.
| Exact capacity | 4196 cm³ |
| Power system | distributed injection |
| Engine power | 305 HP |
| Torque | 420 nm |
| Engine block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder diameter | 86 mm |
| Piston stroke. | 90.3 mm |
| Compression ratio | 11 |
| Engine features | DOHC |
| Hydraulic compensator. | there is no |
| Timing drive | chain |
| Timing phase adjuster | at the inlet VVT |
| Turbocharging | there is no |
| What oils to use | 7.0 liters 5W-30 |
| Fuel type | 95 |
| Environmental class | EURO 4 |
| Approximate life expectancy | 350 000 HP |
| City | 17.1 litry |
| Route | 8.1 litry |
| Mixed | 11.3 litry |
The weight of the AJ34 engine according to the catalog is 180 kg. The engine number AJ34 can be found on the cylinder block. The weak point of this engine is the unreliable VVT type variable valve timing regulators. The engine is made of aluminum and is prone to overheating, so please keep an eye on the cooling system. The VKG valve tends to get clogged quite quickly, leading to high oil consumption. When searching for the culprit of fluctuating RPM, it is worth starting with cleaning the throttle assembly. On high mileage, coolant leaks often occur due to burst hoses.
| XK 2 (X150) | 2006 - 2009 |
| XF 1 (X250) | 2008 - 2009 |
| XJ 7 (X350) | 2003 - 2009 |
| S-Type 1 (X200) | 2004 - 2007 |
The 2.1-liter Jaguar AJ20 petrol engine was produced by the company from 2001 to 2008 and was installed in the smallest model, the X-Type, but it was only available in certain markets. This is the only engine in the series that does not have an equivalent in the Duratec V6 family. The AJ-V6 series also includes the engines: AJ25 and AJ30.
The 4.2-liter V8 petrol engine Jaguar AJ33 was produced by the company from 2002 to 2009 and installed in models such as XK8 and XJ8, as well as S-Type, although it was more commonly referred to as AJ36. In addition to the 4.2-liter engine, a 3.5-liter power unit was also offered under this index. The following engines belong to the AJ-V8 series: AJ28, AJ33S, AJ34, AJ34S, AJ126, AJ133, and AJ133S.
4.2-liter engine Jaguar AJ34S or 4.2 Supercharged was produced from 2006-2009 and installed in the XK model in the turbocharged version marked as XKR, and for another year in the XFR model. This engine is a modernized version of AJ33S and differs in the presence of VVT phase regulators. The AJ-V8 series includes engines: AJ28, AJ33, AJ33S, AJ34, AJ126, AJ133, and AJ133S.
The 4.7-liter V8 engine Jeep EVС or PowerTech High Output was produced from 2002-2008 and installed in the Grand Cherokee SUV, as well as briefly in the Ram and Dakota pickups. This engine not only had more power but also featured a knock sensor. The PowerTech series also includes the engines: EKG, EVA, and EVE.
The 1.5-liter diesel engine Mini Cooper D B37C15A has been produced by the company since 2014 and installed in all models of the third generation, including Clubman and Countryman. This powertrain is one of the representatives of the BMW diesel engine family B37. The same line also includes the engine: B47C20A.