Jaguar AJ-V8 engine

Last updated

Jaguar AJ8
2001 Jaguar S-Type AJ-V8 engine.JPG
Overview
Manufacturer 1996–2012 Jaguar Cars
2013–present Jaguar Land Rover
Production1996–present
2013–2020 (Jaguar AJ6)
Layout
Configuration 90° V8
90° V6
Displacement 3.0 L (2,995 cc) (V6)
3.5 L (3,473 cc)
3.9 L (3,934 cc)
4.0 L (3,996 cc)
4.2 L (4,196 cc)
4.3 L (4,280 cc)
4.4 L (4,394 cc)
4.7 L (4,735 cc)
5.0 L (5,000 cc)
Cylinder bore 84.5 mm (3.33 in) (V6)
86 mm (3.39 in)
88 mm (3.46 in)
89 mm (3.5 in)
91 mm (3.58 in)
92.5 mm (3.64 in)
Piston stroke 86 mm (3.39 in)
70 mm (2.76 in)
76.5 mm (3.01 in)
85 mm (3.35 in)
89 mm (3.5 in) (V6)
90.3 mm (3.56 in)
91 mm (3.58 in)
93 mm (3.66 in)
Cylinder block material Aluminum alloy
Cylinder head materialAluminum alloy
Valvetrain DOHC 4 valves x cyl. with VVT
Compression ratio 10.5:1
Combustion
Supercharger TVS with intercooler (on some versions)
Fuel system Direct injection
Management Bosch
Fuel type Petrol
Cooling system Water-cooled
Output
Power output 240–592 hp (179–441 kW; 243–600 PS)
Torque output 233–561 lb⋅ft (316–761 N⋅m)
Chronology
Predecessor Jaguar AJ16
Jaguar V12
Rover V8
BMW M62
Successor Ingenium AJ300
BMW N63 (Range Rover)

The Jaguar AJ-8 is a compact DOHC V8 piston engine used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. It was an in house design with work beginning before Ford's purchase of the company. In 1997 it replaced both designs previously available on Jaguar cars: the straight-6 Jaguar AJ6 engine (or rather its AJ16 variant), and the Jaguar V12 engine. It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the Jaguar AJ-V6 engine was added to the list. The AJ-V8 is available in displacements ranging from 3.2L to 5.0L, and a supercharged version is also produced. Ford Motor Company also used this engine in other cars, including the Lincoln LS and the 2002–2005 Ford Thunderbird, as well as in several Land Rovers, and the Aston Martin V8 Vantage.

Contents

The AJ-V8 was designed to use Nikasil-coated cylinders rather than the more-common iron cylinder liners. However, like the BMW M60, high-sulphur fuel reacted with the Nikasil coating and caused engine failures. Jaguar replaced affected engines, and has used conventional cast-iron linings ever since.

The engine originally used a two-state Variable Valve Timing system to switch the intake cam timing by 30°. Newer variants use a more sophisticated system which can vary intake timing incrementally up to 48°. The Lincoln version was made in the United States.

Other engine features include fracture-split forged powder metal connecting rods, a special one-piece cast camshaft, and reinforced plastic intake manifold.

The AJ-V8 was on the Ward's 10 Best Engines list for 2000.

Ford ceased production of the AJ-V8 engine in September 2020 when it closed the Bridgend Plant. [1] However, in August 2020 JLR was able to take over production means for the AJ-V8. [2]

Manufacture

The AJ8 engine was manufactured in a, dedicated Jaguar facility located within the Ford Bridgend Engine Plant in Bridgend, South Wales. The Jaguar "plant-within-a-plant" saved considerable investment costs by Jaguar. It was staffed by workers dedicated to Jaguar engine production and included a linked flow-line of computer numerically controlled machines with automated loading and assembly. Component supply was on a "just-in-time" basis. [3] [4] [5] [6]

Jaguar Land Rover has subsequently produced the AJ supercharged petrol V8 Jaguar Land Rover engines in a state-of-the-art Engine Manufacturing Centre in Wolverhampton. [7]

4.0 L

The 4.0 L (3,996 cc)AJ26 engine was introduced in 1996. The number "26" comes from 12+6+8 (cylinders), because when the first ideas were sketched, a family of 6-, 8- and 12-cylinder engines was contemplated, although only the 8-cylinder version was produced. It has a square 86 mm (3.39 in) bore and stroke. It was updated in 1998 as the AJ27 with continuously variable valve timing. The AJ-V8 was updated again in 2000 as the AJ28. The naturally aspirated version produces 290 hp (216 kW; 294 PS) in the 2000–2002 XK8.

Vehicles using this engine:

Supercharged

The supercharged version of the AJ26 is used in the high-performance R versions of Jaguar's cars. The engine was updated with AJ27 specifications for 2000. It produces 370 hp (276 kW; 375 PS) and 387 lb⋅ft (525 N⋅m) with the help of an Eaton supercharger (modified Roots-blower). The supercharged engine did not use variable cam timing as the normal benefits of improved volumetric efficiency are not noticeable on a boosted engine.

Vehicles using the supercharged version include:

3.2 L

The 3.2 litre variant was the second to be introduced. It reduces the stroke to 70 mm (2.76 in) and power falls to 240 hp (179 kW; 243 PS) and 233 lb⋅ft (316 N⋅m). This variant was not available in the North American market.

Vehicles using this engine:

3.5 L

The 3.6 L; 216.9 cu in (3,555 cc), marketed as "3.5", was used in the XJ series as well. The stroke was 76.5 mm (3.01 in). Output was 262 bhp (195 kW; 266 PS) at 6,250 rpm and 345 N⋅m (254 lb⋅ft) at 4,200 rpm.

Vehicles using this engine:

3.9 L

The 3.9 L (3,934 cc)AJ30/AJ35 variant is a unique displacement used only by Ford and Lincoln and is built in Ford's Lima, OH engine plant. Bore and stroke is 86 mm × 85 mm (3.39 in × 3.35 in). The AJ35 version introduced for the 2003 model year added variable valve timing of the intake camshafts and electronic throttle control. While the block, crankshaft, pistons, and connecting rods are all unique to this displacement, many other parts are shared with the AJ-V8 engines produced in the UK by Jaguar.

Vehicles using this engine:

The last AJ35 was produced in March 2006 after only 3 years. Total run of AJ30/35 was nearly 250,000 units

4.2 L

The 4.196 L; 256.1 cu in (4,196 cc), AJ33 and AJ34 versions retain the 86 mm (3.39 in) bore with 90.3 mm (3.56 in) stroke. It was introduced in 2002 as the AJ33 and produces 294 hp (219 kW; 298 PS) at 6,000 rpm with 303 lb⋅ft (411 N⋅m) of torque at 4,100 rpm, later increased to 300 hp (224 kW; 304 PS) and 310 lb⋅ft (420 N⋅m).

Vehicles using this engine:

Supercharged

The AJ33S is a supercharged/intercooled variant of the AJ33. It was introduced in 2002 to replace the 4.0 SC and produces 390 hp (291 kW; 395 PS) at 6,100 rpm with 399 lb⋅ft (541 N⋅m) of torque at 3,500 rpm. The engine was later updated to AJ34S specification to include Variable Valve Timing as well as other minor updates.

4.2-litre Supercharged V8 in a 2003 Jaguar XKR AJ-V8 4.2 XKR.jpg
4.2-litre Supercharged V8 in a 2003 Jaguar XKR

Vehicles using this engine:

Land Rover also offered a supercharged version of the 4.2 L as that company's high-performance engine. Land Rover's version is not the same as the Jaguar's version but it was adapted from it. [8]

Applications:

4.4 L

4.4-litre V8 in a 2006 Range Rover Sport 2006 Land Rover Range Rover Sport engine.jpg
4.4-litre V8 in a 2006 Range Rover Sport

The 4.4 L; 268.1 cu in (4,394 cc)AJ41 version features an 88 mm × 90.3 mm (3.46 in × 3.56 in) bore and stroke. This engine replaced the BMW M62 engine used in 2003-2005 Range Rover models.

Applications:

Aston Martin 4.3/4.7

4.7L V8 in a 2012 Vantage Aston Martin 4.7 litre V8.jpg
4.7L V8 in a 2012 Vantage

Aston Martin hand-assembles a special version of the AJ-V8 for the 2005 V8 Vantage known as AM05 – or while it was under development as AJ37. This unit displaced 4.3 L; 261.2 cu in (4,280 cc) and produces 380 bhp (283 kW; 385 PS) at 7,000 rpm and 409 N⋅m (302 lb⋅ft) at 5,000 rpm. This engine is unique to Aston Martin and features race-style dry-sump lubrication, which enables it to be mounted low to lower the centre of gravity. The firing order is the same as the other AJ-V8 engines although the cylinder numbering is different (AJ37 = 1-5-4-2-6-3-7-8 vs. AJ26 = 1-2-7-3-4-5-6-8). The engine is assembled by hand at the AM facility in Cologne, Germany, which also builds the V12 for the DB9 and Vanquish. The cylinder block, cylinder heads, crankshaft, connecting rods, pistons, camshafts, inlet and exhaust manifolds, lubrication system and engine management are all unique to the Aston Martin version.

In May 2008, Aston Martin released a new design that used pressed cylinder liners instead of cast-in liners. This allowed for thinner liners, and a higher capacity of 4.7 L (4,735 cc; 288.9 cu in) for the V8 Vantage. Called the AM14, power output increased to 420 bhp (313 kW; 426 PS) (an 11% increase on the previous 4.3-litre unit) and peak torque to 470 N⋅m (347 lb⋅ft) (a 15% increase). The Aston Martin V8 Vantage S features the same 4.7-litre V8 engine found in the base Vantage, but with improved intake airflow, new mufflers, and new programming that keeps the exhaust system's bypass valves open longer. The engine in the V8 Vantage S now develops 430 bhp (321 kW; 436 PS) at 7,300 rpm and torque of 490 N⋅m (361 lb⋅ft) at 5,000 rpm representing an increase of 10 bhp (7 kW; 10 PS) and 20 N⋅m (15 lb⋅ft) respectively. This engine is also used in the bespoke Aston Martin DB10 concept car for the 2015 James Bond film Spectre.

4.3, bore and stroke 89 mm × 86 mm (3.50 in × 3.39 in)

4.7, bore and stroke 91 mm × 91 mm (3.58 in × 3.58 in)

Applications:

AJ-V8 Gen III 5.0

An all new direct injection 5.0 L engine family was introduced in 2009 (all new engine block). [9] Now featuring: spray-guided direct-injection, continuously variable intake and exhaust camshaft timing. The naturally aspirated engines also feature cam profile switching and variable track length inlet manifold. Supercharged engines make use of a sixth-generation TVS (Twin Vortices Series) supercharger. The 2010 model year engine conforms to EU5 and ULEV2 emissions regulations. [9]

The engine is controlled by Denso's Generation 1.6 Engine Management System. Later switching to Bosch for the F-Type and other mid-2010 models going forward.

AJ133

Bore and stroke is 92.5 mm × 93 mm (3.64 in × 3.66 in).

Land Rover version is called 'LR-V8 Petrol engine'.

Vehicles using this engine:
YearsModelPower outputTorque
20092015 Jaguar XF 385 PS (283 kW; 380 hp)515 N⋅m (380 lb⋅ft)
20102015 Jaguar XF Supercharged 470 PS (346 kW; 464 hp)575 N⋅m (424 lb⋅ft)
20102015 Jaguar XFR 510 PS (375 kW; 503 hp)625 N⋅m (461 lb⋅ft)
20132015 Jaguar XFR-S 550 PS (405 kW; 542 hp)680 N⋅m (502 lb⋅ft)
20092015 Jaguar XJ 385 PS (283 kW; 380 hp)515 N⋅m (380 lb⋅ft)
20092019 Jaguar XJ Supercharged 470 PS (346 kW; 464 hp)575 N⋅m (424 lb⋅ft)
20092013 Jaguar XJ Supersport 510 PS (375 kW; 503 hp)625 N⋅m (461 lb⋅ft)
20142017 Jaguar XJR 550 PS (405 kW; 542 hp)680 N⋅m (502 lb⋅ft)
20182019 Jaguar XJR575 575 PS (423 kW; 567 hp)700 N⋅m (516 lb⋅ft)
20092014 Jaguar XK 385 PS (283 kW; 380 hp)515 N⋅m (380 lb⋅ft)
20092015 Jaguar XKR 510 PS (375 kW; 503 hp)625 N⋅m (461 lb⋅ft)
20112015 Jaguar XKR-S 550 PS (405 kW; 542 hp)680 N⋅m (502 lb⋅ft)
20132014 Jaguar XKR-S GT 550 PS (405 kW; 542 hp)680 N⋅m (502 lb⋅ft)
20132015 Jaguar F-Type V8 S 495 PS (364 kW; 488 hp)625 N⋅m (461 lb⋅ft)
20142020 Jaguar F-Type R 550 PS (405 kW; 542 hp)680 N⋅m (502 lb⋅ft)
20152020 Jaguar F-Type SVR 575 PS (423 kW; 567 hp)680 N⋅m (502 lb⋅ft)
20152016 Jaguar F-Type Project 7 575 PS (423 kW; 567 hp)680 N⋅m (502 lb⋅ft)
2020present Jaguar F-Type P450 450 PS (331 kW; 444 hp)580 N⋅m (428 lb⋅ft)
2020present Jaguar F-Type R 575 PS (423 kW; 567 hp)680 N⋅m (502 lb⋅ft)
20182019 Jaguar XE SV Project 8 600 PS (441 kW; 592 hp)700 N⋅m (516 lb⋅ft)
2018present Jaguar F-Pace SVR 550 PS (405 kW; 542 hp)700 N⋅m (516 lb⋅ft)
20092015 Land Rover Discovery 4 / LR4 375 PS (276 kW; 370 hp)375 lb⋅ft (508 N⋅m)
20092015 Land Rover Range Rover Sport 375 PS (276 kW; 370 hp)375 lb⋅ft (508 N⋅m)
20092022 Land Rover Range Rover Sport Supercharged 510 PS (375 kW; 503 hp)461 lb⋅ft (625 N⋅m)
20152022 Land Rover Range Rover Sport SVR 550 PS (405 kW; 542 hp)502 lb⋅ft (681 N⋅m)
20092014 Land Rover Range Rover 375 PS (276 kW; 370 hp)375 lb⋅ft (508 N⋅m)
20092021 Land Rover Range Rover Supercharged 510 PS (375 kW; 503 hp)461 lb⋅ft (625 N⋅m)
20192020 Land Rover Range Rover Velar SVAutobiography 550 PS (405 kW; 542 hp)502 lb⋅ft (681 N⋅m)
2018 Land Rover Defender Works V8 405 PS (298 kW; 399 hp)380 lb⋅ft (515 N⋅m)
2021present Land Rover Defender V8 525 PS (386 kW; 518 hp)461 lb⋅ft (625 N⋅m)

The Bowler Nemesis and David Brown Speedback Silverstone Edition also use a variant of this engine producing 600 PS (441 kW; 592 hp).

V6

AJ126

The AJ126 V6 utilizes a AJ133 V8 engine block with the rear two cylinder bores blanked, and reduced bore sizes on the remaining six cylinders. [10] While the engine block is the same size as the V8, the cylinder heads are shortened versions of the V8 heads. It is made on the same production line as the AJ133.

The AJ126 is a 3.0 L; 182.8 cu in (2,995 cc) 90° petrol V6, having a bore and stroke of 84.5 mm × 89 mm (3.33 in × 3.50 in) with a 10.5:1 compression ratio. It is supercharged and liquid cooled featuring direct fuel injection, four overhead camshafts and four valves per cylinder. There are two versions differing in power produced, a standard version making 340 PS (250 kW; 335 hp) at 6,500 rpm and 332 lb⋅ft (450 N⋅m) between 3,500-5,000 rpm and a high-performance variant making 380 PS (279 kW; 375 hp) at 6,500 rpm and 339 lb⋅ft (460 N⋅m) between 3,500-5,000 rpm. A special Jaguar F-Type 400 Sport model made 400 PS (294 kW; 395 hp) and 339 lb⋅ft (460 N⋅m).

The main structural components of the engine are all manufactured from aluminum alloy. The engine is built around a very stiff, lightweight, enclosed V, deep skirt cylinder block. A structural windage tray is bolted to the bottom of the cylinder block to further improve the block stiffness, minimize NVH (noise, vibration and harshness) and help reduce oil foaming. To further enhance the stiffness of the lower engine structure, a heavily ribbed sump body is installed. The sump body also helps to reduce engine noise.

The engine uses a Bosch high pressure direct injection fuel system with fuel pressure provided by two, cam driven high pressure pumps which are driven by a dedicated camshaft. The high pressure pumps supply the fuel rails which in turn supply the three injectors for that bank with fuel at a controlled pressure.

The four camshafts incorporate VCT (variable camshaft timing). VCT allows the timing of the intake and exhaust valves to be adjusted independently of each other. The VCT system is controlled by the Bosch ECM (engine control module) using information from CMP (camshaft position) sensors. The crankshaft features offset journals and a counterweight in place of the deleted pistons and rods.

The supercharger is located in the 'vee' of the engine and is driven from the crankshaft by a dedicated secondary drive belt.

The engine meets EU5 emission regulations in Europe and Rest of World (ROW) and ULEV 70 emission regulations in North American Specification (NAS) markets.

The direct fuel injection system, advanced piston and combustion chamber design and the supercharger provide improved fuel consumption and emissions.

Jaguar will be replacing the AJ-126 with an all new Ingenium turbocharged inline-6 engine.

Vehicles using this engine:

See also

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References

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  2. "Jaguar Land Rover to continue AJ V8 production in-house". Autocar. Retrieved 28 December 2020.
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