The Jaguar AJ25 2.5-liter gasoline engine was produced by the concern from 2001 to 2009 and was installed on the most popular models of the British company, such as the S-Type and X-Type. This motor was essentially one of the varieties of power units of the Duratec V6 family.
AJ-V6 series: AJ20, AJ25, AJ30.
Specifications
| Production years | 2001-2009 |
| Displacement, cc | 2495 |
| Fuel system | distributed injection |
| Power output, hp | 195 – 200 |
| Torque output, Nm | 240 – 250 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 81.65 |
| Piston stroke, mm | 79.50 |
| Compression ratio | 10.5 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | on the intake shaft |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.9 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Jaguar X-Type 2009) — city — highway — combined |
15.0 7.6 10.3 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 170 |
The engine was installed on:
- Jaguar S-Type 1 (X200) in 2002 – 2007;
- Jaguar X-Type 1 (X400) in 2001 – 2009.
Disadvantages of the Jaguar AJ25 engine
- The unit is quite reliable, but has many rare and expensive parts;
- The main problems are associated with air leaks due to drying gaskets;
- Also, the electrically driven geometry change system often fails in the intake;
- The crankcase ventilation valve here requires regular cleaning or the lubricant will press from all the cracks;
- At high mileage, oil consumption occurs due to the fault of stuck piston rings.
