The Jaguar AJ27 4.0-liter V8 petrol engine was produced by the company from 1998 to 2003 and was installed on the main modifications of the XJ8 sedan in the X308 body and the XK coupe in the X100 body. In addition to the 4.0-liter engine, there was a simplified 3.2-liter version without a phase regulator.
AJ-V8 family: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, AJ133S.
Specifications
| Production years | 1998-2003 |
| Displacement, cc | 3996 3248 |
| Fuel system | distributed injection |
| Power output, hp | 290 (4.0 liters) 240 (3.2 liters) |
| Torque output, Nm | 393 (4.0 liters) 316 (3.2 liters) |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 86 (4.0 liters) 70 (3.2 liters) |
| Compression ratio | 10.75 (4.0 liters) 10.5 (3.2 liters) |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | VVT at the intake (4.0 liters) no (3.2 liters) |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.3 |
| Fuel type | petrol |
| Euro standards | EURO 2/3 |
| Fuel consumption, L/100 km (for Jaguar XJ8 2000) — city — highway — combined |
16.9 9.0 11.9 |
| Engine lifespan, km | ~400 000 |
| Weight, kg | 180 |
The engine was installed on:
- Jaguar XJ 6 (X308) in 1998 – 2003;
- Jaguar XK 1 (X100) in 1998 – 2002.
Disadvantages of the Jaguar AJ27 engine
- At first, the engines were coated with nikasil and were very afraid of bad fuel.
- In 1999, the coating was replaced by cast iron sleeves and the problem with its shedding was gone.
- The timing chain is not very large resource, sometimes even less than 100,000 km.
- The aluminum unit is afraid of overheating, so keep an eye on the condition of the radiators.
- Other problems here are related to sensor glitches and leaks of lubricant or antifreeze.
Frequently asked questions about the Jaguar AJ27
How much power does the Jaguar AJ27 make?
Power output of the Jaguar AJ27, hp: 290 (4.0 liters); 240 (3.2 liters). Torque, Nm: 393 (4.0 liters); 316 (3.2 liters).
How much oil does the Jaguar AJ27 take and which one?
Engine oil capacity: 7.3 liters. Recommended oil: 5W-30.
Does the Jaguar AJ27 have a timing belt or chain?
The Jaguar AJ27 uses a timing chain.
Is the Jaguar AJ27 turbocharged?
No, the Jaguar AJ27 is naturally aspirated.
Does the Jaguar AJ27 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 AJ27 last?
The typical lifespan of the Jaguar AJ27 is ~400 000 km with proper maintenance.
What is the fuel consumption of the Jaguar AJ27?
Jaguar XJ8 2000: city 16.9, highway 9.0, combined 11.9 L/100 km.
What cars was the Jaguar AJ27 installed on?
Jaguar XJ 6 (X308) in 1998 - 2003; Jaguar XK 1 (X100) in 1998 - 2002.
What are the common problems of the Jaguar AJ27?
At first, the engines were coated with nikasil and were very afraid of bad fuel. In 1999, the coating was replaced by cast iron sleeves and the problem with its shedding was gone. All known problems.
