Jaguar AJ V8

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The Jaguar AJ-V8 engine was designed to give excellent performance, refinement, economy and low vibration levels. After the legendary Jaguar V12 and XK I6 engines it had a hard act to follow.

For a quad cam 32V V8 it was very compact, weighing in at only 200 kilograms (441 lb). It was shorter by 12 inches (300mm) than it’s predecessors.

The whole engine is built from cast aluminium including the cylinder heads, block and bed-plate. Some models are fitted with variable valve timing, which was introduced to improve low and high speed performance. The chain driven valve gear has zero valve overlay, which not only reduces hydrocarbon emissions but in conjunction with the variable valve timing gives a smoother idle.

Jaguar AJ-V8 engine

Jaguar AJ-V8 Specifications
Model / Engine Capacity Max. Engine Torque(DIN) Max. Engine Power(DIN) Max. Engine Torque(EC and SAE) Max. Engine Power(EC and SAE) Comp. Ratio Bore Stroke
XJ: 1998 up to 2003.5 MY – VIN From 812317 To F59525

  • 1998-2003 Jaguar XJ8 V8 (3248cc 237hp AJ27)
  • 1998-2003 Jaguar XK8 V8 (3248cc 237hp AJ27)
  • 1999-2004 Jaguar XJ8 V8 (3996cc 290hp AJ27)
  • 1999-2004 Jaguar XK8 V8 (3996cc 290hp AJ27)
  • 2000-2003 Jaguar XJR (3996cc supercharged 370hp AJ27S)
  • 2000-2003 Jaguar XKR (3996cc supercharged 370hp AJ27S)
  • 2000-2002 Vanden Plas (3996cc supercharged 370hp AJ27S)VIN 878718 onwards had conventional steel liners
3.2 litrePetrol3248cc
(198.2 in³)
316Nm
233lb ft
@4350RPM
240BHP
179kW
243PS
@ 6350RPM
310Nm
228lb ft
@4350RPM
233BHP
174kW
237PS
@6350RPM
10.5:1±0.5:1 86.0mm(3.386in) 70.0mm(2.756in)
4.0 litre
Petrol
3996cc
(244 in³)
393Nm
290lb ft
@4250RPM
290BHP
216kW
294PS
@6100RPM
375Nm
276lb ft
@4250RPM
280BHP
209kW
284PS
@6100RPM
10.75:1±0.5:1 86.0mm(3.386in) 86.0mm(3.386in)
4.0 litre
Super-charged
Petrol
3996cc
(244 in³)
525Nm
387lb ft
@3600RPM
370BHP
276kW
375PS
@6150RPM
505Nm
372lb ft
@3600RPM
358BHP
267kW
363PS
@6150RPM
8.9:1±0.5:1 86.0mm(3.386in) 86.0mm(3.386in)
XJ: 2003.5 MY onward – VIN From G00442 To Current

  • 2002–present Jaguar XJ8 V8 (3555cc 262hp AJ27)
  • 2004–present Jaguar XJ8 (4196cc 294hp AJ34)
  • 2004-2009 Jaguar XJR/Super V8 (4196cc supercharged / inter-cooled 400hp AJ34S)
3.5 litre
Petrol
3555cc
(216 in³)
345Nm
254lb ft
@4200RPM
262BHP
196kW
266PS
@6250RPM
335.2Nm
262lb ft
@4200RPM
255BHP
190kW
258PS
@6250RPM
11.0:1±0.5:1 86.0mm(3.386in) 76.5mm(3.011in)
4.2 litre
Petrol
4196cc
(256 in³)
420Nm
310lb ft
@4100RPM
300BHP
224kW
304PS
@6000RPM
410.8Nm
303lb ft
@4100RPM
293.5BHP
218.9kW298PS
@6000RPM
11.0:1±0.5:1 86.0mm(3.386in) 90.3mm(3.555in)
4.2 litre
Super-charged
Petrol
4196cc
(256 in³)
553Nm
408lb ft
@3500RPM
400BHP
298kW
406PS
@6100RPM
541.4Nm
399lb ft
@3500RPM
390BHP
290.8kW
395PS
@6100RPM
9.1:1±0.5:1 86.0mm(3.386in) 90.3mm(3.555in)
XK: 1997 up to 1998.75 MY – VIN From 001246 To 024686

  • 1997-1998 Jaguar XK8 V8 (3996cc 290hp AJ26)
4.0 litre
Petrol
3996cc
(244 in³)
393Nm
290lb ft
@4250RPM
290BHP
216kW
294PS
@6100RPM
375Nm
276lb ft
@4250RPM
280BHP
209kW
284PS
@6100RPM
10.75:1±0.5:1 86.0mm(3.386in) 86.0mm(3.386in)
XK: 1998.75 up to 2003 MY – VIN From 024687 To A30644

  • 1999-2004 Jaguar XK8 V8 (3996cc 290hp AJ27)
  • 2000-2003 Jaguar XKR (3996cc supercharged 370hp AJ27S)
    VIN 42776 onwards had conventional steel liners
4.0 litre
Petrol
3996cc
(244 in³)
393Nm
290lb ft
@4250RPM
290BHP
216kW
294PS
@6100RPM
375Nm
276lb ft
@4250RPM
280BHP
209kW
284PS
@6100RPM
10.75:1±0.5:1 86.0mm(3.386in) 86.0mm(3.386in)
4.0 litre
Super-charged
Petrol
3996cc
(244 in³)
525Nm
387lb ft
@3600RPM
370BHP
276kW
375PS
@6150RPM
505Nm
372lb ft
@3600RPM
358BHP
267kW
363PS
@6150RPM
8.9:1±0.5:1 86.0mm(3.386in) 86.0mm(3.386in)
XK: 2003 MY onward – VIN From A30645 To Current

  • 2003–present Jaguar XK-series (4196cc 294hp AJ34)
  • 2003-2010 Jaguar XKR (4196cc supercharged / inter-cooled 400hp AJ34S)
4.2 litre
Petrol
4196cc
(256 in³)
420Nm
310lb ft
@4100RPM
300BHP
224kW
304PS
@6000RPM
410.8Nm
303lb ft
@4100RPM
293.5BHP
218.9kW
298PS
@6000RPM
11.0:1±0.5: 1 86.0mm(3.386in) 90.3mm(3.555in)
4.2 litre
Super-charged
Petrol
4196cc
(256 in³)
553Nm
408lb ft
@3500RPM
400BHP
298kW
406PS
@6100RPM
541.4Nm
399lb ft
@3500RPM
390BHP
290.8kW
395PS
@6100RPM
9.1:1±0.5:1 86.0mm(3.386in) 90.3mm(3.555in)
S-TYPE: 1999.25 up to 2002.5 MY – VIN From L00600 To M45254

  • 2000-2002 Jaguar S type V8 (3996cc 291hp AJ28)
4.0 litre
Petrol
3996cc
(244 in³)
390Nm
287lb ft
@4300RPM
281BHP
209kW
284PS
@6100RPM
378Nm
279lb ft
@4300RPM
272BHP
203kW
276PS
@6100RPM
10.75:1±0.5:1 86.0mm(3.386in) 86.0mm(3.386in)
S-TYPE: 2002.5 MY onward – VIN From M45255 To Current

  • 2003–present Jaguar S-Type (4196cc 294hp AJ34)2003-2008 Jaguar S-Type R (4196cc supercharged / inter-cooled 400hp AJ34S)
4.2 litre
Petrol
4196cc
(256 in³)
420Nm
310lb ft
@4100RPM
300BHP
224kW
304PS
@6000RPM
410.8Nm
303lb ft
@4100RPM
293.5BHP
218.9kW
298PS
@6000RPM
11.0:1±0.5:1 86.0mm(3.386in) 90.3mm(3.555in)
4.2 litre
Super-charged
Petrol
4196cc
256 in³)
553Nm
408lb ft
@3500RPM
400BHP
298kW
406PS
6100RPM
541.4Nm
399lb ft
@3500RPM
390BHP
290.8kW
395PS
@6100RPM
9.1:1±0.5:1 86.0mm(3.386in) 90.3mm(3.555in)

The first generation AJ-V8 is available in many guises from 3.2 to 4.7Litre (237hp -420hp).

Being owned by Ford, the engine also appeared in many other cars:

  • 1997-1998 Jaguar XJ8 V8 (3248cc 237hp AJ26)
  • 1997-1998 Jaguar XK8 V8 (3248cc 237hp AJ26)
  • 1999-2004 Jaguar XJ8 V8 (3248cc 237hp AJ27)
  • 1999-2004 Jaguar XK8 V8 (3248cc 237hp AJ27)
  • 2002–present Jaguar XJ8 V8 (3555cc 262hp AJ27)
  • 1997-1998 Jaguar XJ8 V8 (3996cc 290hp AJ26)
  • 1997-1998 Jaguar XK8 V8 (3996cc 290hp AJ26)
  • 1999-2004 Jaguar XJ8 V8 (3996cc 290hp AJ27)
  • 1999-2004 Jaguar XK8 V8 (3996cc 290hp AJ27)
  • 2000-2002 Jaguar S type V8 (3996cc 291hp AJ28)
  • 1998-1999 Jaguar XJR (3996cc supercharged 370hp AJ26S)
  • 1998-1999 Jaguar XKR (3996cc supercharged 370hp AJ26S)
  • 2000-2003 Jaguar XJR (3996cc supercharged 370hp AJ27S)
  • 2000-2003 Jaguar XKR (3996cc supercharged 370hp AJ27S)
  • 2000-2002 Vanden Plas (3996cc supercharged 370hp AJ27S)
  • 2002 Daimler Super V8 (3996cc supercharged 370hp AJ27S)
  • 2003–present Jaguar XK-series (4196cc 294hp AJ34)
  • 2003–present Jaguar S-Type (4196cc 294hp AJ34)
  • 2004–present Jaguar XJ8 (4196cc 294hp AJ34)
  • 2009–present Jaguar XF (4196cc 294hp AJ34)
  • 2004-2009 Jaguar XJR/Super V8 (4196cc supercharged / inter-cooled 400hp AJ34S)
  • 2003-2010 Jaguar XKR (4196cc supercharged / inter-cooled 400hp AJ34S)
  • 2003-2008 Jaguar S-Type R (4196cc supercharged / inter-cooled 400hp AJ34S)
  • 2005–present Daimler Super Eight (4196cc supercharged / inter-cooled 400hp AJ34S)
  • 2009-2010 Jaguar XF (4196cc supercharged / inter-cooled 420hp AJ34S)
  • 2000-2002 Lincoln LS (3934cc 252hp AJ30)
  • 2003-2006 Lincoln LS (3934cc 280hp AJ35)
  • 2003-2005 Ford Thunderbird (3934cc 280hp AJ35)
  • 2006 Land Rover Range Rover Sport (4197cc supercharged / inter-cooled 385hp)
  • 2006 Land Rover Range Rover (4197cc supercharged / inter-cooled 400hp)
  • 2005 Land Rover Discovery (4392cc 300hp)
  • 2006 Land Rover Range Rover Sport (4392cc 300hp)
  • 2006 Land Rover Range Rover (4392cc 305hp)
  • 2005–2008 Aston Martin V8 Vantage (4280cc 380hp)
  • 2008–present Aston Martin V8 Vantage (4735cc 420hp)

Jaguar AJ-V8 VIN Number Identification

Jaguar AJ-V8 VIN Number location

Jaguar AJ-V8 VIN Numbers
Model Year VIN
From To
XJ

  • 1998 – Introduction of V8 3.2L Petrol Engine.
  • 1998 – Introduction of V8 4.0L N/A and Supercharged Petrol Engine.
  • 2003.5 – Introduction of New XJ.
  • 2003.5 – Introduction of V6 3.0L Petrol Engine.
  • 2003.5 – Introduction of V8 3.5L Petrol Engine.
  • 2003.5 – Introduction of V8 4.2L N/A and Petrol Petrol Engine.
  • 2005 – Introduction of LWB.
1998 812317 853935
1999 853936 878717
2000 F00103 F20644
2001 F20645 F41862
2002 F41863 F59525
2003.5 G00442 G12877
2004 G12878 G34526
2005 G34527 Current
XK

  • 1997 – Introduction of V8 4.0L N/A Gasoline Engine.
  • 1998.75 – Introduction of V8 4.0L SC Gasoline Engine.
  • 2003 – Introduction of V8 4.2L N/A and Supercharged Gasoline Engine.
1997 001246 018107
1998 018108 024686
1998.75 024687 031302
1999 031303 042775
2000 A00116 A11139
2001 A11140 A24195
2002 A24196 A30644
2003 A30645 A35154
2003.5 A35155 A36873
2004 A36874 A40264
2004.5 A40265 Current
S-TYPE

  • 1999.25 – Introduction of V6 3.0L Petrol Engines.
  • 1999.25 – Introduction of V8 4.0L Petrol Engines.
  • 2002.5 – Introduction of V6 2.5L Petrol Engines.
  • 2002.5 – Introduction of V8 4.2L N/A and Superchraged Petrol Engine.
  • 2004.75 – Introduction of V6 2.7L Diesel Engine.
1999.25 L00600 L31320
2000 L31321 L52822
2000.5 L52823 L86901
2001 L86902 M45254
2002.5 M45255 M62935
2003 M62936 M94764
2004 M94765 N13088
2004.5 N13089 N14070
2004.75 N14071 Current

The VIN (Vehicle Identification Number) stamping is located on the right-hand-side of the luggage compartment and a quick reference plate is visible through the left-hand lower corner of the windshield.

  • A Engine Technical Data, also Serial Number from 2001 MY
  • B Serial Number up to 2001 MY
  • C Emission Code XJ and XK
  • D S-TYPE Emission Code, primary position (up to VIN M51309)
  • E S-TYPE Emission Code, primary position (VIN M51310 onward), also XJ 2003.5 MY
  • F S-TYPE Emission Code, secondary position for amended codes, also XJ 2003.5 MY

Jagaur XJ (VIN)

Up to 2003.5 MY:

  • The VIN and other information are usually displayed on a label located either on the rear edge of the left-hand front door or on the body front-upper cross-member.
  • The VIN stamping is located on the right-hand-side of the luggage compartment and a quick reference plate is visible through the left-hand lower corner of the windshield.

2003.5 MY onward:

  • The VIN and other information are displayed on a label located on left-hand “A” pillar.
  • The VIN stamping is located on the right-hand-side of the luggage compartment and a quick reference plate is visible through the left-hand lower corner of the windshield.

Jaguar XK (VIN)

  • The VIN and other information are displayed on a label located on the left-hand “B” pillar above the door striker plate.
  • The VIN stamping is located on the right-hand-side of the luggage compartment and a quick reference plate is visible through the left-hand lower corner of the windshield.

Jaguar S-TYPE (VIN)

  • The VIN and other information are displayed on a label located on left-hand “A” pillar.
  • The VIN stamping is located on the right-hand-side of the luggage compartment and a quick reference plate is visible through the left-hand lower corner of the windshield.

Jaguar X-TYPE (VIN)

The VIN and other information are displayed on a label, located on:

  • early vehicles, the left-hand “A” pillar,
  • later vehicles, bottom of the left-hand “B” pillar.

Jaguar AJ-V8 Development

Early engines used Nikasil cyclinder liners. These liners had been used in motorbike engines and racing cars for years. These liners reacted with high sulphur petrols available at the time. Now, as high sulphur petrol has dissapeared from the market, Nikasil may return along with all the benefits of weight and reduced friction.

During the development phase of this engine Jaguar experimented with V12’s, 5 valves per cylinder and different V angles. Although some people accredit the design of this engine to Ford it was in fact all Jaguar.

The AJ-V8 is a liquid cooled 90° V8 engine, that gives refined and effortless performance. Constructed in aluminum alloy, the AJ-V8 introduces several innovative design features new to Jaguar engines, the most notable of these being:

  • a bedplate
  • nikasil coated cylinder bores – later replaced with conventional steel liners
  • fracture split connecting rods
  • variable valve timing
  • aluminum alloy valve lifters
  • electronic throttle control.

Jaguar AJ-V8 Engine

  1. Cylinder Heads
  2. Cylinder Block
  3. Bedplate
  4. Structural Sump
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