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Jaguar XJ (X350)

The Jaguar XJ (X350) is a full-size four-door luxury saloon car manufactured and marketed worldwide by Jaguar Cars for model years 2003–2009 as the third generation of the Jaguar XJ saloon, carrying the internal designation X350 and the internal designation X358 following its 2007 intermediate facelift. Both the X350 and X358 were available with a six-speed automatic transmission, a range of petrol and diesel engines, numerous trim levels, and short wheelbase (2003–2009) or long wheelbase (2005–2009) car body configurations. The extended-length model was the longest saloon Jaguar had manufactured, eclipsing the 1961–1970 Mark X, though the latter is still 3 inches (8 cm) wider.

{{anchor|X350}} X350
Body and chassis The X350's aluminium bodyshell used an aerospace construction method, a hybrid of adhesive bonding and rivet joinery and known as rivet-bonding or riv-bonding, which was an industry first in volume automotive production. which were bonded using 120 yards of robotically applied, heat-cured, aerospace-grade epoxy adhesives, and approximately 3,200 self-piercing zinc-coated, boron steel rivets, which were Jaguar's first use of self-piercing rivets. In addition to the rivets, which do not require a predrilled or punched hole, each rivet making its own hole on insertion, the process also uses a small number of nuts, bolts, and spot welds. Castings and extrusions accounted for about 11 percent of the XJ bodyshell. To reduce front-end collision repair costs and ameliorate increased insurance rates associated with aluminium construction, the body was designed to withstand an impact of 10 mph without structural damage and used a bolt-on front-end module (BOFE). Design and engineering The X350 employed a multi-link suspension layout with four-wheel self-levelling, adaptive air suspension instead of the previous generation's double wishbone of the Jaguar IRS. The suspension was controlled electronically, requiring no intervention from the driver, to adjust damper settings (in milliseconds) and the ride, and handling under varying conditions; this electronic control system was marketed as the Computer Active Technology Suspension (CATS). The air suspension was designed to activate every 24 hours to level the vehicle when parked and not in use. The long-wheelbase model, introduced in 2005, was the longest vehicle Jaguar had manufactured at the time. With a five inch extension behind the B-pillar (i.e. the rear doors were 5 inches longer), The turning radius was increased by 13 inches over the standard-wheelbase model. At introduction, upper trim levels offered soft grain leather, leatherette fascia top and contrasting seat piping, inlaid Peruvian boxwood trim, lambswool rugs, 320-watt, 12-speaker audio system, 4-zone heating and cooling system, 16-way adjustable front seats, rear heated seats and optional electrically reclining rear seat, and power rear centre sunblind. The 3.2 L V8 from the previous model was replaced by the 3.0 L V6 from the X-Type and S-Type. The V6 powers the XJ6, while the XJ8 was powered by a naturally aspirated V8. The XJR was powered by a supercharged 4.2 L V8. The XJ6 and the XJ TDVi are the only X350 models not sold in the Americas. In 2005, Jaguar introduced the diesel-powered XJ TDVi, featuring the same FordPeugeot-developed 2.7-litre twin-turbocharged V6 found in the S-Type. The engine, known as the AJD-V6, is rated at and of torque, and was fitted with electronically controlled active engine mounts to minimise vibration at idle. Both X350 and X358 used a six-speed automatic transmission manufactured by ZF Friedrichshafen. North American XJ models were equipped with the naturally aspirated engine or an optional supercharged 4.2 L V8 engine. The latter engine's valvetrain had a dual overhead cam design with four valves per cylinder and its top speed was electronically limited to . For the 2005 model year, Jaguar introduced a long-wheelbase variant of the X350. For 2007, the premium model was reintroduced as the Jaguar Sovereign when the Super V8 and Daimler versions were dropped. == X356 (2005 facelift)==
{{anchor|X356}} X356 (2005 facelift)
The facelifted X350 debuted in 2005 for the model year 2006, with a revised front grille, deleted mid-door trim and slightly redesigned front fenders. Some vehicle electronics systems were updated. Trim levels == X358 (2007 facelift)==
{{anchor|X358}} X358 (2007 facelift)
The facelifted X350 debuted in February 2007 for the model year 2008 with a revised front grille and front bumper assembly featuring a prominent lower grille. A Jaguar emblem within the grille replaced the previous bonnet-mounted ornament. The front lights were revised and door mirrors incorporated side repeaters. The front wings had prominent faux side vents, and the side sills, rear bumper, and taillights were revised. The interior featured redesigned front seats. The model list for the United Kingdom did not include the 3.5-litre V8 engine available in Germany. Engines All engines were paired with a ZF six-speed automatic transmission. The XJ6 petrol versions had a lower final drive ratio. ==Special uses==
Special uses
The car was used by British prime ministers, including Tony Blair and Gordon Brown. Previous and successive versions of the XJ were also used by Margaret Thatcher, John Major, David Cameron, Theresa May, and Boris Johnson as their Prime Ministerial Car. ==Reception==
Reception
The XJ (X350) generally received positive reactions and compared well to its main competitors, while criticism rested on its conservative style design, which some critics said did not reflect the car's innovation and technology; to address this and increase sales, a facelift was available in 2007. A more radical, postmodern design was done for the XJ (X351), which nonetheless shared the X350's platform, and the X350 remained the last of retro-designed Jaguars. As of February 2010, it had sold 295,365 units. Before its release in 2003, an X350 was tested by Jaguar historian Paul Skilleter. An X358 TDVi was featured in an episode of BBC 2's Top Gear. It was driven 750 miles on a single tank of fuel by Jeremy Clarkson from Basel to Blackpool. Despite coming second behind a VW Polo BlueMotion the presenters agreed that the Jaguar was "the true hero". Clarkson described the car as "astonishing". About the X350's all-alluminium body, Andrew Frankel of Hagerty wrote: "In fact the car was a revolution. Because beneath those golf club car park looks lurked what I believe to be the first entirely aluminum monocoque designed for a mass production road car [Editor's note: Technically the Honda NSX got there first, but it depends where you draw the line for 'mass production'....]." Despite its similarity to the XJ (X308), the X350 was praised for its elegant styling, engine, technology, interior, and handling, while the rear legroom was relatively small considered the car's length. In his review of the 2003 Jaguar XJ8, Jonathan Hawley wrote: "When pushed hard over lumpy and twisting roads, the air suspension can get a little confused and produces some nasty thumping noises." In his review for NRMA, Bill McKinnon said: "The 3.5. likes to be revved and delivers its best when worked manually from 3500 rpm to the 6800 rpm redline... The big Jag still delivers a luxurious ride, though its aggressive wheel/tyre package makes you aware of the road surface to a greater extent than previous models. The air suspension is extremely effective at ironing out big impacts." In his 2003 review for Motoring Research, Peter Burgess praised the X350's interior, as well as its engine for the sports car potential if revved and the quietness, attributing it to the car's light weight. He commended the X350 for being economical to run; the XJ6 tested in May 2003 averaged 23mpg on the 3.0-litre. He also positively reacted to the six-speed automatic transmission. Criticism rested on the rear legroom despite improvement and the lack of a full manual control of the automatic gearbox. Burgess concluded: "The big advantage that this Jaguar offers over and above the Audi A8, BMW 7 Series and Mercedes–Benz S–Class is a sense of individuality. This is a car which stands apart from the competition yet in most ways is their equal. While the Germans are caught in a technological spiral of ever–outdoing each other, the British car gets on with the job of looking after the driver and passenger is a rather charming way." In a review of the 2008 XJ, Autoblog.com wrote: "Underway in town or on the highway, the XJ is smooth, quiet, stately and powerful, and it handles winding roads quite well for its size. It's easier to operate, certainly less complicated, than the BMW 7 Series, Audi A8, and Mercedes S-Class. It's less burdened with systems and processes that can frustrate with their complexity. The five XJ models are loaded with sophisticated safety and performance technology, mind you, but all that technology is tucked away in a less obtrusive fashion, and it generally works without annoyance or distraction. The XJs deliver the best EPA fuel mileage ratings in this class, and none carries a Gas Guzzler Tax." Like many used luxury cars, the X350 has experienced significant depreciation on the used market. Classic Motoring concluded: "The X350 and the 358 facelift carries on the XJ's tradition by offering not only astonishing value but also a driving experience that few others can match let alone surpass." Prices starts as low as £1,500 to as high as £20,000 for the low-mileage, more luxurious models. In a 2007 review by Andy Enright for RAC, he concluded that "the Jaguar XJ makes a great used buy. It's reliable, well built and great fun to drive. Here's a British built car that knocks the Germans into a cocked hat." In a 2017 retrospective for Honest John Classics, Craig Cheetham wrote: "Like all Jaguar XJs, the X350 offers fantastic ride quality, ironing out bumps like no other car, while maintaining the agility of a much smaller vehicle. Comfort and handling, then, are exemplary, as, indeed, is the luxury of the car's cabin. Indeed, the only real criticism of the X350 is that, in many ways, it was too traditional. Allegedly, there were some fairly senior people in Jaguar who hated it, because of its traditional appearance didn't do its technological advancement justice, nor do enough to attract new, younger buyers to the Jaguar brand. They had a point... but irrespective, the X350 is a wonderful, rewarding and cossetting car." ==References==
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