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Modèles Jaguar

Jaguar Xj



Generation 1



Series 1 (1968–1973)

Jaguar Xj


The XJ6, using 2.8 litre (2,790 cc/170 cu in) and 4.2 litre (4,235 cc/258.4 cu in) straight-six cylinder versions of Jaguar's renowned XK engine, replaced most of Jaguar's saloons – which, in the 1960s, had expanded to four separate ranges. Apart from the engines, the other main component carried over from previous models was the widest version of Jaguar's IRS unit from the Mark X.
An upmarket version was marketed under the Daimler brand and called the Daimler Sovereign, continuing the name from the Daimler version of the Jaguar 420.
The car was introduced in September 1968. Power-assisted steering and leather upholstery were standard on the 2.8 L De Luxe and 4.2 L models and air conditioning was offered as an optional extra on the 4.2 L. Daimler versions were launched in October 1969, in a series of television advertisements featuring Sir William. In these spots, he referred to the car as "the finest Jaguar ever". An unusual feature, inherited from the Jaguar Mark X, was the provision of twin fuel tanks, positioned on each side of the boot / trunk, and filled using two separately lockable filler caps: one on the top of each wing above the rear wheel arches.

Jaguar Xj

In March 1970 it was announced that the Borg-Warner Model 8 automatic transmission, which the XJ6 had featured since 1968, would be replaced on the 4.2 litre-engined XJ6 with a Borg-Warner Model 12 unit. The new transmission now had three different forward positions accessed via the selector lever, which effectively enabled performance oriented drivers to hold lower ratios at higher revs in order to achieve better acceleration. "Greatly improved shift quality" was also claimed for the new system.
In 1972 the option of a long-wheelbase version, providing a modest increase in leg room for passengers in the back, became available.
The XJ12 version was announced in July 1972, featuring simplified grille treatment, and powered by a 5.3 L V12 engine (coupled to a Borg Warner Model 12), : The car as presented at that time was the world's only mass-produced 12-cylinder four-door car, and, with a top speed "around 140 mph" (225 km/h) as the "fastest full four-seater available in the world today". Although it had, from the car's launch, been the manufacturer's intention that the XJ would take the twelve-cylinder engine, its installation was nonetheless a tight fit, and providing adequate cooling had evidently been a challenge for the engineers designing the installation. Bonnet/hood louvres such as those fitted on the recently introduced twelve-cylinder E Type were rejected, but the XJ12 featured a complex "cross-flow" radiator divided into two separated horizontal sections and supported with coolant feeder tanks at each end: the engine fan was geared to rotate at 1¼ times the speed of the engine rpm, subject to a limiter which cut in at a (fan) speed of 1,700 rpm. The fuel system incorporated a relief valve that returned fuel to the tank when pressure in the leads to the carburetters exceeded 1.5 psi in order to reduce the risk of vapour locks occurring at the engine's high operating temperature, while the car's battery, unusually, benefited from its own thermostatically controlled cooling fan.

Jaguar Xj
© D. Guisolan

3,235 of these first generation XJ12s were built. As with the six-cylinder cars, an upmarket version, this time called the Daimler Double-Six, became available later, reviving the Daimler model name of 1926–1938.
Total production figures for the Series 1


Jaguar XJ6 2.8 swb 19,322
Jaguar XJ6 4.2 swb 59,077

Jaguar Xj
© D. Guisolan

Jaguar XJ6 4.2 lwb 574
Jaguar XJ12 swb 2,474
Jaguar XJ12 lwb 754
Daimler Sovereign 2.8 3,233
Daimler Sovereign 4.2 swb 11,522
Daimler Sovereign 4.2 lwb 386
Daimler Double Six swb 534
Daimler Double Six Vanden Plas 351
Total Production for Series 1 98,527

Series 2 (1973–1979)

Commonly referred to as the "Series II", the XJ line was facelifted in Autumn 1973 for the 1974 model year. The 4.2 L I-6 XJ6 (most popular in the United Kingdom) and the 5.3 L V12 XJ12 were continued with an addition of a 3.4 L (3,442 cc/210.0 cu in) version of the XK engine available from 1975.
The Series II models were known for their poor build quality, which was attributed to Jaguar being part of the British Leyland group along with massive labour union relations problems that plagued most of industrial England in the same time period, and to problems inherent in the design of certain Lucas-sourced components.

Jaguar Xj

Initially the Series II was offered with two wheelbases, but at the 1974 London Motor Show Jaguar announced the withdrawal of the 'standard wheelbase' version: subsequent saloons/sedans all featured the extra 4 inches (10 cm) of passenger cabin length hitherto featured only on the 'long-wheelbase' model. By this time the first customer deliveries of the two-door coupe, which retained the shorter 'standard' wheelbase (and which had already been formally 'launched' more than a year earlier) were only months away.

Jaguar Xj

Visually, Series II cars are differentiated from their predecessors by raised front bumpers to meet US crash safety regulations, which necessitated a smaller grille, complemented by a discrete additional inlet directly below the bumper. The interior received a substantial update, including simplified heating and a/c systems to address criticisms of the complex and not very effective Series I system.

Jaguar Xj

In April 1975, the North American Series II got a slightly revised set of front bumpers which had rubber overriders covering the full length of the bumper with embedded turn signals at each end. In 1978 the North American cars also got the addition of electronic fuel injection in the place of Zenith-Stromberg carburettors.
In May 1977, it was announced that automatic transmission version of the twelve-cylinder cars would be fitted with a General Motors three-speed THM 400 transmission in place of the British built Borg-Warner units used hitherto.
The 1978 UK model range included the Jaguar XJ 3.4, XJ 4.2, XJ 5.3, Daimler Sovereign 4.2, Double-Six 5.3, Daimler Vanden Plas 4.2, Double-Six Vanden Plas 5.3.

Jaguar Xj

In New Zealand, knock-down kits of the Series II were assembled locally by the New Zealand Motor Corporation (NZMC) at their Nelson plant. In the last year of production in New Zealand (1978), a special 'SuperJag' (XJ6-SLE) model was produced which featured half leather, half dralon wide pleat seats, vinyl roof, chrome steel wheels and air conditioning as standard. New Zealand produced models featured speedometers in km/h, and the black vinyl mats sewn onto the carpets in the front footwells featured the British Leyland 'L' logo.

Jaguar Xj

Though worldwide production of the Series II ended in 1979, a number were produced in Cape Town, South Africa until 1981.
A total of 91,227 Series II models were produced, 14,226 of them with the V12 engine.
Engines

1973–1975 DOHC I-6 2,792 (171 cu. in.) 140
1975–1979 DOHC I-6 3,442 (210 cu. in.) 161
1973–1979 DOHC I-6 4,235 (258 cu. in.) 245/162-186 (*)
1973–1979 SOHC V12 5,343 (326 cu. in.) 265/244 (*)
(*) HP varies depending on emission standards imposed on particular vehicles
Production count

1973 1488 168
1974 13526 4744
1975 11990 2239
1976 12157 3283
1977 9043 1913
1978 12138 3284
1979 1099 429

Jaguar Xj

Total 61,441 16,060

XJ Coupé

A 9,378-car run of two-door XJ coupés with a pillarless hardtop body called the XJ-C was built between 1975 and 1978. The car was actually launched at the London Motor Show in October 1973, but it subsequently became clear that it was not ready for production, and the economic troubles unfolding in the western world at this time seem to have reduced further any sense of urgency about producing and selling the cars: it was reported that problems with window sealing delayed production. XJ coupés finally started to emerge from Jaguar show-rooms only some two years later. The coupé was based on the short-wheelbase version of the XJ. The coupé's elongated doors were made out of a lengthened standard XJ front door (the weld seams are clearly visible under the interior panels where two front door shells were grafted together with a single outer skin). A few XJ-Cs were modified by Avon into convertibles with a retractable canvas top, but this was not a factory product. Both six and twelve-cylinder models were offered, 6,505 of the former and 1,873 of the latter. Even with the delay, these cars suffered from water leaks and wind noise. The delayed introduction, the labour-intensive work required by the modified saloon body, the higher price than the four-door car, and the early demise promulgated by the new XJ-S, all ensured a small production run.

Jaguar Xj

All coupes came with a vinyl roof as standard. Since the coupe lacked B-pillars, the roof flexed enough that the paint used by Jaguar at the time would develop cracks. More modern paints do not suffer such problems, so whenever a coupe is repainted it is viable to remove the vinyl. Today many XJ-Cs no longer have their vinyl roof, also removing the threat of roof rust. Some owners also modified their XJ-C by changing to Series III bumpers. This lifted the front indicators from under the bumper and provided built in rear fog lights.

Jaguar Xj

A small number of Daimler versions of the XJ-C were made. One prototype Daimler Vanden Plas version XJ-C was also made, however this version never went into production.
Production





Grand total = 10,426 XJ Coupe

Jaguar Xj

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Source :
  1. www.jaguar.fr
  2. www.jaguarcars.com
  3. www.fjdc.asso.fr/
  4. www.jaguask.co.uk
  5. fr.wikipedia.org/ Jaguar
  6. www.jaguar.com
  7. www.webfocus.co.nz/jaguar/
  8. www.bitcon.no/~gunnar/sovereign.html
  9. www.jaguar-e-type.net/
  10. www.web-cars.com/e-type/
  11. www.bitcon.no/~gunnar/sovereign.html


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