The company produced the 4.0-liter V8 Jaguar AJ28 petrol engine from 1999 to 2002, but it was only fitted to sophisticated S-Type sedan modifications prior to its initial redesign. This motor was an adaptation of the AJ26 unit found on the XK sports model.
AJ-V8 series: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, and AJ133S.
Specifications
| Production years | 1999-2002 |
| Displacement, cc | 3996 |
| Fuel system | distributed injection |
| Power output, hp | 276 |
| Torque output, Nm | 378 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 86 |
| Compression ratio | 10.75 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Jaguar S-Type 2000) — city — highway — combined |
17.1 8.2 11.5 |
| Engine lifespan, km | ~400 000 |
The engine was installed on:
- Jaguar S-Type 1 (X200) in 1999 – 2002.
Disadvantages of the Jaguar AJ28 engine
The timing chain is characterized by a low resource, sometimes serving less than 100,000 kilometers; the initial motors in this series had nikasil, but the AJ28 version had cast iron sleeves;
Additionally, the engine ECU frequently malfunctions here, so it’s best to update the firmware right away;
This engine keeps an eye on the state of the radiators, pump, and thermostat because it fears overheating;
The remaining issues are associated with sensor malfunctions and lubricant or antifreeze leaks.