XJS Timeline
#1
09-24-2017, 03:38 PM
XJS Timeline
I'm trying to compile a timeline of major engine, component or trim modifications in the XJS line. There are a lot of timelines out there already, but some disagree, others are just too much reading.
If anyone notes any errors, omissions, or useful additions please let me know!
If anyone notes any errors, omissions, or useful additions please let me know!
Code:
1975 XJ-S Launch ( available Sept 3 1975–1981 ) 5.3 L V-12, Lucas D-Jetronic Type 3CU ( LRZ103 & LRZ113? ) 3 speed Borg-Warner Model 12 automatic transmission 4 speed manual transmission ( avail. 1975-1979 ) 1977 New GM Turbo-Hydramatic 400 automatic transmission replaced B-W Model 12. 1979 End 4 speed manual transmission ( 352 installed into XJ-S V-12s ) 1980 New Lucas digital-P EFI 6CU ( catalyst: DAC 2597 & DAC 3586 non-catalyst: DAC 2596 & DAC 3062), O2 sensors, 3 way catalysts Compression increase from 7.8 to 9.0:1, giving 262 hp SAE (195 kW) and 290 lb-ft (392 N-m) of torque. Uncatalyzed European cars, with 10.0 compression, now boasted 300 hp DIN (220 kW) and 318 lb-ft (429 N-m) 1981 XJ-S HE Launch ( available July 1981-1991 ) 5.3L V12 HE engine New May “Fireball” heads, Higher compression ratios: 12.5:1 in un-catalyzed cars, 11.5:1 in federalized engines. New chrome bumper blades, veneered dash (burr elm), simplified instrumentation, stylish starfish alloys, twin coachlines, mirrors, more leather. European H.E.s got trim bumpers without impact-absorbing struts 1982 Lynx Eventer Launch - ( 63 available ) Sussex-based coachbuilder Lynx Motors International began offering a unique three-door shooting brake (wagon) conversion of the XJ-S. 1983 XJ-SC Cabriolet Launch ( available 1983-1988 ) New 3.6L Jaguar AJ6 engine straight-six (I6) 24-valve, 3,590 cc (219 cu. in.) DOHC 225 hp DIN (165 kW) and 240 lb-ft (324 N-m). 250 lb (114 kg) lighter than the V12. Lucas 8CU EFI. 3.54 axle ratio, Five-speed Getrag manual gearbox 1984 New XJ-SC with 5.3L V12 ( N.A. in US ) 1985 New XJ-SC with 5.3L V12 ( US ) 1986 New Lucas digital-P EFI 16CU ( catalyst: DAC4118, DAC4585, DAC6335, & DAC6337. low compression 11.5:1: ??? non-catalyst: DAC4119, DAC4478, DAC4586 & DAC6336. High compression12.5:1:??? low compression non-cat: DAC6338. ) Hess & Eisenhardt XJS Convertible Launch (US only) ( available 1986-1988 ) 1987 3.6L XJS, New suspension makeover and wider, more aggressive tires New optional 4 speed ZF 4HP22 auto transmission New cross spoke lattice alloys, thinner body stripe 1988 JaguarSport XJR-S 5.3L Launch ( 5.3L available 1988-1989 ) TWR-tuned, Special High performance V12, TH400 transmission, Tungsten, TWR ground effect, wheels and interior. Commemorating Jaguars Le Mans success. NEW power seats 1989 XJ-S Convertible Launch ( available 1989-1996 ) 5.3L V12 HE, +200 lb (+100 kg) XJR-S 6.0L Launch ( 6.0L available 1989-1993 ) New Marelli EFI (except XJR-S) New Teves Mark III ABS on all models 1990 XJS Rouge Coupe Launch (US only) New driver’s-side airbag 1991 XJS Facelift Launch ( XJS Facelift available May 1991-1996) New 6.0 L V-12, GM 4L80E with a fourth-gear overdrive, teves ABS alloys, large molded bumpers, single piece Euro style headlights on US model New Lucas 26CU New 4.0-litre AJ6. Classic Collection XJS Launch 1992 New 4.0-litre, electronic ZF4HP24E transmission or NEW 5 speed Getrag manual gearbox (NA in US ) XJS Convertible 2+2 Launch 1993 4.0-litre, electronic ZF4HP24E transmission or NEW 5 speed Getrag manual gearbox ( Now available in US ) North American XJR-S 6.0L Launch ( 100 XJR-S 6.0L available in US ) New 6L stroked 5.3, 318hp, Zytec, GM 400 Turbo, limited slip differential. Signal Red, or Jet Black, Convetible or Coupe, special body kit, wheels, interior New Lucas 36CU New outboard rear disc brakes 1994 3 May AJ16 Launch New Passenger’s-side airbag 1995 XJS “Celebration edition” Launch New 4.0L AJ16, 240bhp, sequential fuel injection, coil-on-plug ignition, new seats, electronic ZF 4 speed auto. New Modified engine management netted the V12 another 23 hp to 301 New Teves Mark IV ABS End Manual transmission option
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#2
09-24-2017, 03:49 PM
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JigJag (09-25-2017)
#3
09-24-2017, 04:15 PM
I'm unsure. I'm pulling info from a lot of sources here. Doesn't ring a bell for me either.
There was information regarding the XJ-SC receiving a suspension change. I'll re-find the source. It was apparently poorly received.
#4
09-24-2017, 06:28 PM
Veteran Member
Jigjag,
A couple of suggestions:
October 83 was introduction of 3.6 Cabriolet AND Coupe
Key amendment to 3.6 was in Feb 87 with the introduction of micro-fuelling. Sportspack option on 3.6 is September 87
Teves ABS brakes is March 88.
XJR-S is not "TWR-tuned". JaguarSport was a joint venture company. TWR as separate company stopped enhancing XJ-Ss from this point.
Not sure what is relevance or accuracy of "Special NEW power seats"?
Classic Collection is US only
New 4 litre with ZF4HP24 or Getrag 290 is May 91 with introduction of facelift, not 92 or 93. V12 facelift were 5.3 not 6.0
4 litre convertible is Feb 92
"Factory" 6.0 litre was introduced in May 93 but not with GM400 Turbo. It was introduced with GML480E
Big change in May 93 (apart from the "factory" 6.0 litre engine and outboard disc brakes, is the introdution of the big plastic bumpers for all cars.
Teves MkIV is Oct 94 (7 months before "Celebration")
Celebration is April 95 but not a new 4.0 engine. No mechanical changes at all at this point. V12 was not changed to give 301 (It was already giving 318 before this.)
4.0 manual transmission option was not dropped. It was available until end production.
Obviously there's lots of other interim changes, but I think you've got most of the the major ones.
Hope that helps. Let me know if you need any more info.
Cheers
Paul
A couple of suggestions:
October 83 was introduction of 3.6 Cabriolet AND Coupe
Key amendment to 3.6 was in Feb 87 with the introduction of micro-fuelling. Sportspack option on 3.6 is September 87
Teves ABS brakes is March 88.
XJR-S is not "TWR-tuned". JaguarSport was a joint venture company. TWR as separate company stopped enhancing XJ-Ss from this point.
Not sure what is relevance or accuracy of "Special NEW power seats"?
Classic Collection is US only
New 4 litre with ZF4HP24 or Getrag 290 is May 91 with introduction of facelift, not 92 or 93. V12 facelift were 5.3 not 6.0
4 litre convertible is Feb 92
"Factory" 6.0 litre was introduced in May 93 but not with GM400 Turbo. It was introduced with GML480E
Big change in May 93 (apart from the "factory" 6.0 litre engine and outboard disc brakes, is the introdution of the big plastic bumpers for all cars.
Teves MkIV is Oct 94 (7 months before "Celebration")
Celebration is April 95 but not a new 4.0 engine. No mechanical changes at all at this point. V12 was not changed to give 301 (It was already giving 318 before this.)
4.0 manual transmission option was not dropped. It was available until end production.
Obviously there's lots of other interim changes, but I think you've got most of the the major ones.
Hope that helps. Let me know if you need any more info.
Cheers
Paul
Last edited by ptjs1; 09-25-2017 at 03:59 AM.
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JigJag (09-25-2017)
#6
09-25-2017, 01:10 AM
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One major change across the range was in 1987 or 88. The original Jaguar column stalks, as used in all models for years up to then, were changed for generic Ford stalks. In addition the front seats were changed for more Recaro style, slightly narrower ones and the Delanaire aircon unit was improved to the Mark III version with a manual full cold over-ride feature.
I realise it is a lot of work, but VIN numbers are pretty important alongside the changes you list, in my opinion.
I realise it is a lot of work, but VIN numbers are pretty important alongside the changes you list, in my opinion.
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JigJag (09-25-2017)
#7
09-25-2017, 02:17 AM
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One major change across the range was in 1987 or 88. The original Jaguar column stalks, as used in all models for years up to then, were changed for generic Ford stalks. In addition the front seats were changed for more Recaro style, slightly narrower ones and the Delanaire aircon unit was improved to the Mark III version with a manual full cold over-ride feature.
I realise it is a lot of work, but VIN numbers are pretty important alongside the changes you list, in my opinion.
I realise it is a lot of work, but VIN numbers are pretty important alongside the changes you list, in my opinion.
1988.5 saw the introductIon of the Marelli ignition.
1989 saw the introduction of the sports steering wheel as a standard item on all models.
1990 saw the introduction of the Ford hexagon key with heightadjustable steering column.
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JigJag (09-25-2017)
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#8
09-25-2017, 03:58 AM
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I think that the problem with documenting small changes such as seats, wheels etc is that there are hundreds of changes that were implemented over the life of the car eg twin windscreen wash jets in Feb 87 - where do you stop?
I do think that the only way to document any changes is by VIN and month / year. Anything else is hit and miss. Even MY doesn't cut it unless you use the original Jaguar MY not the forced US MY, as even those varied by the end of production.
Paul
I do think that the only way to document any changes is by VIN and month / year. Anything else is hit and miss. Even MY doesn't cut it unless you use the original Jaguar MY not the forced US MY, as even those varied by the end of production.
Paul
#9
09-25-2017, 05:55 AM
Thank you guys for the additional info and corrections. I'm surprised at how much contradiction is out there about this info. I'm incorporating it and modifying formatting to better convey it.
I'm doing this to demark significant model changes that affect the discussions on this board. When someone has an issue with their XJS I often times don't have any idea just how their model differs from mine. I'd like to be a little less ignorant than I am so I know what I don't know and keep to what I do know.
I can add VIN breakpoints. That would be valuable. I have also added production numbers. I don't think I want to make this too dense with minor changes or it will be too much information for me to absorb.
ptjs1, What is "micro-fueling" in relation to the 3.6 engine?
Here's the current version. PDF to hold formatting. CODE tags make that little viewport I hate. File updated at 8:00AM EST.
I'm doing this to demark significant model changes that affect the discussions on this board. When someone has an issue with their XJS I often times don't have any idea just how their model differs from mine. I'd like to be a little less ignorant than I am so I know what I don't know and keep to what I do know.
I can add VIN breakpoints. That would be valuable. I have also added production numbers. I don't think I want to make this too dense with minor changes or it will be too much information for me to absorb.
ptjs1, What is "micro-fueling" in relation to the 3.6 engine?
Here's the current version. PDF to hold formatting. CODE tags make that little viewport I hate. File updated at 8:00AM EST.
Last edited by JigJag; 09-25-2017 at 06:58 AM. Reason: update attached file
#10
09-25-2017, 03:32 PM
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#12
09-25-2017, 05:09 PM
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Warren,
Yes, the 5.3 never used the GML480E.
I think there's 3 versions of the 6.0, although 2 of them are very similar.
First there was the TWR 6 litre engine which was special order for the TWR-enhanced cars. That was only available until 1988 when TWR stopped enhancing XJSs. Then there was the XJR-S 6 litre engine from 1989 (although that was based on the original TWR engine). Then there was the "factory" 6 litre engine from May 1993 which,as you point out, is quite different.
Paul
Yes, the 5.3 never used the GML480E.
I think there's 3 versions of the 6.0, although 2 of them are very similar.
First there was the TWR 6 litre engine which was special order for the TWR-enhanced cars. That was only available until 1988 when TWR stopped enhancing XJSs. Then there was the XJR-S 6 litre engine from 1989 (although that was based on the original TWR engine). Then there was the "factory" 6 litre engine from May 1993 which,as you point out, is quite different.
Paul
