Engine Designer[edit]

The Chief Engineer (project leader) for the AJ26 project was Dave Szczupak. The actual lead designer for the cylinder head was Joe Cooke and for the bottom end of the engine (block, crank, rods, pistons, oil system etc) it was Nigel Massey and Carl White. The engine was 100% unique. The only Ford parts re-used were the oil filler cap, the crank shaft damper woodruff key and the sump plug. The AJ26, 27, 28, 34 & LR V8's were only ever built in Bridgend, North Wales. The AJ30 (3.9l US version) was built in Lima in the USA and used in the Thunderbird and Lincoln DEW98. The engine was adopted into LR vehicles in 2004; first in the Discovery/ RR Sport and then replacing the BMW 4.4l V8 in the RangeRover (L322).

All of the above are 100% factually correct as I was part of the team that designed the engine - M Joyce - 6th Sep 2008

For the 4.0 other parts in addition to what is above are Ford parts and available over the counter at a ford dealership, including timing chains, tensioners, gaskets to name parts I've personally bought. I think (but can not confirm) that many other parts including oil filter, water pump, thermostat and some engine sensors are available as well. I am sure these are unique to the AJ-series of engines but they are still Ford parts with a Ford part number and everything. — Preceding unsigned comment added by 2602:306:8B3C:7360:1D1A:3A0C:7ECD:A36 (talk) 22:58, 4 September 2016 (UTC)[reply]

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I thought the Range Rover used a BMW v8? -- stewacide

It did/does but the AJ is being adapted as we speak. I'll check whether this change is 2004 or 2005. --SFoskett 18:05, Aug 7, 2004 (UTC)

Aston Martin V8[edit]

I was at Jaguar engineering when this engine was being designed. It had, rather confusingly, two codes at the start. A Jaguar code - AJ37 and an Aston Martin code - AM5. The Jaguar code was dropped after a while to avoid confusion and highlight internally that this was an Aston Martin engine.
LewisR 01:55, 14 September 2007 (UTC) I was one of the folks deeply involved in the AJ37 V8 for Aston Martin. I worked for Jaguar. I outlined the cam profiles, intake manifold and exhausting as well as the combustion chamber and did a lot of the test work. I concur with what Lewis R says. The engine was originally designed for the AM305M- which was to be mid engined and then it switched to the front engined layout. Platform was going to be shared with the X600 'F type' originally but later ended up using the VH Aston Platform as the X600 was dropped. The intake manifold had to be redesigned. John Filby did a lot of the initial work and then Pete Vaughan inherited the design work. Pete Vaughan please RIP. The world lost an amazing designer. — Preceding unsigned comment added by 198.233.119.178 (talk) 18:25, 29 December 2016 (UTC)[reply]

Land Rover V8 Codes[edit]

They had the designation of AJ43 & AJ44 for the NA & SC engines although I do need to verify this.
LewisR 01:55, 14 September 2007 (UTC)[reply]

Engine designer[edit]

Can we clarify who the engine was actually designed by, and the locations it is actually built - I know that the head designer for the 'AJV8' family was David Szczupak of Jaguar cars and bears no relation to the Ford Modular Family but many are convinced this is the same block - the confusion mainly comes, I assume, from the fact that it was fitted to the T-bird and the Lincoln LS from (as I gather) 2002 on, and in a unique diplacement. Anything to verify this against. 77.100.12.167 (talk) 07:22, 28 June 2008 (UTC)[reply]

Crank[edit]

Missing info on this page:

Does this engine have a cross-plane crankshaft or a flat-plane crankshaft? —Preceding unsigned comment added by 209.139.213.73 (talk) 20:29, 6 May 2009 (UTC)[reply]

It's a cross-plane crank. Easy to tell if you hear a cross-plane; it burbles.

Can we quantify this with a source please as its hard to find confirmation online anywhere! — Preceding unsigned comment added by 121.209.212.19 (talk) 11:37, 14 June 2015 (UTC)[reply]

Look at the firing order (ISO 12734568), it is a cross plane. A flat plane 90 degree V8 must alternate between the left and right banks on successive firing pulses while a cross plane will have 2 cylinders on each bank firing successively during once complete cycle (2 revolutions) in this case 7&3 and 6&8. — Preceding unsigned comment added by 2602:306:8B3C:7360:1D1A:3A0C:7ECD:A36 (talk) 22:48, 4 September 2016 (UTC)[reply]

AJ26 Name[edit]

The name, AJ26, came about not because they didn't know of it'd be a 6, 8 or 12 cylinder engine but because it was meant to be a family of modular engines, the first of which being the V8 [ i.e. "6", "2+6=8", "2x6=12" ]. The 6 & 12 were meant to follow but from early on, they were dropped. The V8 was chosen as BMW & Lexus had recently launched V8 engines in their exec. saloons.

The derivation of the name AJ26 is extremely simple - the engine was designed as a Modular 6, 8 & 12 cylinder family. 6+8+12 = 26. The AJ stands for "Advanced Jaguar" following the AJ6 from the 1980's. I can't remember if I proposed this name or Dave Szczupak. The V6 was dropped because the Cleveland V6 (2.5l and 3.0l) had reasonable Power, torque, economy etc and Ford did not want two similar V6's made in different factories in 2 places in the world. The V12 was dropped because it was thought by marketing that the sales volumes would be too small to justify the investment — Preceding unsigned comment added by 86.12.161.74 (talk) 12:48, 11 November 2013 (UTC)[reply]

LewisR (talk) 21:33, 3 April 2012 (UTC)[reply]

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Fuel injection[edit]

This engine is not direct injection; but rather port fuel injection. A common misconception about the fuel injection style. 2601:18C:8280:A60:D4E9:47B5:6FE8:D8BC (talk) 01:25, 11 July 2022 (UTC)[reply]