The Jaguar AJ28 4.0-liter V8 petrol engine was produced by the company from 1999 to 2002 and installed only on advanced modifications of the S-Type sedan before its first restyling. This motor was a variation of the AJ26 unit, which was installed on the XK sports model.
AJ-V8 family: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, 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 |
| Weight, kg | 180 |
The engine was installed on:
- Jaguar S-Type 1 (X200) in 1999 – 2002.
Disadvantages of the Jaguar AJ28 engine
- The first motors of this series were with nikasil, but the AJ28 version with cast iron sleeves;
- The timing chain is distinguished by a low resource, sometimes it serves less than 100 thousand km;
- Also, the engine ECU often fails here and it is better to immediately fill in the latest firmware;
- This engine is afraid of overheating, monitor the condition of the radiators, pump and thermostat;
- The remaining problems are related to sensor glitches and leaks of lubricant or antifreeze.
Frequently asked questions about the Jaguar AJ28
How much power does the Jaguar AJ28 make?
The Jaguar AJ28 develops 276 hp and 378 Nm of torque.
How much oil does the Jaguar AJ28 take and which one?
Engine oil capacity: 6.0 liters. Recommended oil: 5W-30.
Does the Jaguar AJ28 have a timing belt or chain?
The Jaguar AJ28 uses a timing chain.
Is the Jaguar AJ28 turbocharged?
No, the Jaguar AJ28 is naturally aspirated.
Does the Jaguar AJ28 need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Jaguar AJ28 last?
The typical lifespan of the Jaguar AJ28 is ~400 000 km with proper maintenance.
What is the fuel consumption of the Jaguar AJ28?
Jaguar S-Type 2000: city 17.1, highway 8.2, combined 11.5 L/100 km.
What cars was the Jaguar AJ28 installed on?
Jaguar S-Type 1 (X200) in 1999 - 2002.
What are the common problems of the Jaguar AJ28?
The first motors of this series were with nikasil, but the AJ28 version with cast iron sleeves. The timing chain is distinguished by a low resource, sometimes it serves less than 100 thousand km. All known problems.
