The 4.2-liter Jaguar AJ34S or 4.2 Supercharged engine was produced from 2006 to 2009 and was installed on the charged modification of the XK model under the XKR index, and for another year on the XFR. This motor is an updated version of the AJ33S and is distinguished by the presence of VVT phase regulators.
AJ-V8 family: AJ126, AJ27, AJ27S, AJ28, AJ33, AJ33S, AJ34, AJ34S, AJ133, AJ133S.
Specifications
| Production years | 2006-2009 |
| Displacement, cc | 4196 |
| Fuel system | distributed injection |
| Power output, hp | 420 |
| Torque output, Nm | 560 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 90.3 |
| Compression ratio | 9.1 |
| Features | intercooler |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | VVT at the intake |
| Turbocharging | Eaton M112 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.0 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Jaguar XKR 2008) — city — highway — combined |
19.1 8.6 12.3 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 190 |
The engine was installed on:
- Jaguar XF 1 (X250) in 2008 – 2009;
- Jaguar XK 2 (X150) in 2006 – 2009.
Disadvantages of the Jaguar AJ34S engine
- The aluminum motor is very afraid of overheating, so keep the radiator clean;
- VVT phase regulators have a limited resource, sometimes less than 100,000 km;
- The crankcase ventilation valve clogs quickly, which immediately leads to high oil consumption;
- Periodic cleaning is required here for the throttle assembly and fuel injectors;
- At high mileage, antifreeze leaks often occur due to burst pipes.
Frequently asked questions about the Jaguar AJ34S
How much power does the Jaguar AJ34S make?
The Jaguar AJ34S develops 420 hp and 560 Nm of torque.
How much oil does the Jaguar AJ34S take and which one?
Engine oil capacity: 7.0 liters. Recommended oil: 5W-30.
Does the Jaguar AJ34S have a timing belt or chain?
The Jaguar AJ34S uses a timing chain.
Is the Jaguar AJ34S turbocharged?
Yes, the Jaguar AJ34S is turbocharged (Eaton M112).
Does the Jaguar AJ34S 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 AJ34S last?
The typical lifespan of the Jaguar AJ34S is ~300 000 km with proper maintenance.
What is the fuel consumption of the Jaguar AJ34S?
Jaguar XKR 2008: city 19.1, highway 8.6, combined 12.3 L/100 km.
What cars was the Jaguar AJ34S installed on?
Jaguar XF 1 (X250) in 2008 - 2009; Jaguar XK 2 (X150) in 2006 - 2009.
What are the common problems of the Jaguar AJ34S?
The aluminum motor is very afraid of overheating, so keep the radiator clean. VVT phase regulators have a limited resource, sometimes less than 100,000 km. All known problems.
