X308 Vs X350 Comparison Essay


2004 XJ8 at Lime Rock Race Park CT

It's always the same thing whenever Jaguar introduces a new model... as soon as the word is out that a new cat is about to leap out of Coventry, Jaguar enthusiasts watch anxiously to see if it is good enough to receive a leaper or growler on its bonnet. Nowadays, with Ford in charge of Jaguar's destiny the question seem to generate even more buzz and excitement... is it a Ford, a Forduar or a true Jaguar?

What makes a Jaguar... style? comfort? performance? luxury? all of the above obviously but then the same can be said of other high end vehicles like Mercedes, BMW and the Japanese rebadgers. If a new Jaguar turns out to be just fast, pretty, comfy and luxurious then it's just another luxury car. Exterior styling can't just be about styling clues from the past, it needs to be elegant, refined, with those long tapered lines which can not be sacrificed just to boast better interior or trunk volume numbers. When you slip behind the wheel, it must not only have a familiar look, it also must have that special feeling of fitting you like a glove. On the road, the ride must have that special blend of comfort and firmness where you will feel the road without being reminded of each of its imperfection. And a new Jaguar must be technologically advanced without forcing its owner to spend a day reading a computer guide before taking it for a spin. Otherwise, it's just another luxury car...

Is the 7th generation XJ Saloon worthy of its leaper? let's take a closer look...

Bigger is better!
There is little doubt that the previous generation XJ, the X308, was one of the most gorgeous car on the road but there is no denying that its slim tapered body meant that interior and boot space fell just a few inches short of what many buyers expected. The new X350 addresses these shortcomings without sacrificing style: it is a good compromise, taller and a longer with an extended wheelbase. The result is 2 inches additional front legroom and an impressive extra 5 inches in the rear. Headroom also goes up by an inch in the front and almost 2 inches in back. Boot space goes up nearly 30% from the X300 which had less luggage space that the S and X-types...

Yes, the boot lid is higher on the X350, the lines are not as tapered as they were on the X308, the doors are taller, but the car is still the most elegant particularly when compared to the latest offerings from BMW or Lexus. The new XJ is the last design from the late and brilliant Geoff Lawson, a design finalized by Ian Callum and his team using subtle touches like the side repeaters integrated in the rubbing strip or the thin door handles placed in the thin crease.

If the front end appears to look like a combination of X308 and X-Type, the grille breaks away from the previous generations and goes back to the horizontal slats design of the series 1 XJ6 unveiled in 1968. No surprises on the XJR which gets the familiar R mesh grilled and body colored surround. Shorter overhang ahead of the front wheels make the XJ more purposeful.

From the back, the taller boot lid is quickly forgotten with the familiar shape of the rear light cluster. The boot lid shape is still dictated by the triangular taillights and its slightly curved shape is nicely enhanced by the name plinth (chrome on XJs, body color on XJR).

Bigger is heavier... not!
Jaguar has been bragging about the all new technology it developed for the X350 construction: Aluminum Intensive using state of the art bonding and self piercing rivets adapted from the aerospace industry. Unlike Audi, the only other manufacturer using aluminum, the X350 uses a monocoque shell. Sounds exciting? it is... the new XJ body shell is 30% lighter yet 60% stiffer than the outgoing X308 improving handling, ride quality and the overall feel of the chassis on less than perfect roads. As pioneered on the revised S-type in 2003, a magnesium cross beam in the front bulkhead and magnesium seat frames contribute to weight reduction.

- The Great -
Greatly Improved comfort and space
Plenty of power from the silky smooth V8
The J-Gate is alive and well
Suspension / ride quality
No "For-the-sake-of-it-technology"

- The Good -
Exterior styling
6th gear: good on paper but doesn't improve performance

-The not so Good -
Bonnet opens like a hood
Fuel filler on the right hand fender
J-gate spacing
No manual gear box!

What it means
Despite the increased interior volume, I was happy to still get the familiar 'fit like a glove" feeling when I slipped behind the wheel of a 2004 XJR at Lime Rock Race Park, one of the stop for the Jaguar Born to Perform North American Tour. The glove may not be as tight of a fit as on my own 99 XJR but I felt at home. Moreover, I instantly noticed the difference in comfort in the seat with drastic improvement in support even before using the 16 ways power adjustments. In addition to the familiar electric steering wheel, the pedals are now adjustable too; the perfect driving position is easy to find. Back seat are electrically adjustable on the Vanden Plas and an optional multimedia package brings LCD screens in the back of the front seat headrests for those who need to watch a DVD or play a video game...

The interior layout is no surprise and owners of current Jaguars will feel right at home. A wide center console which flows up into the dash and its wide expanse of the best wood veneer work. Jaguars have always featured the best woodwork, second to none except maybe Rolls Royce and the new XJ is no exception. Gone are the controversial deeply recessed instruments which the passenger couldn't see (very handy feature if your wife think speed limits must be observed), instead they are set in a recessed pod with chrome surround around the gauges. Gone is the conventional hand brake lever, replaced by the high tech electronic parking brake introduced on the 2003 S-type operated by a small chrome gizmo behind the J-Gate, kept by Jaguar despite the (unfair) criticism it receives from most of the automotive press. I love the J-Gate for it is the only way to control the automatic gearbox while getting some direct feedback from the selected gear: the lever position tells your wrist where you are without having to look at some display as with push buttons or slapsticks. Unfortunately, adding an extra gear means the spacing on the J-gate is too small with an imprecise detent between gears. Too bad.

Other interior improvements bring fixes to the flimsy cup holders used in the past (about time after 8 years) using the same slide back armrest design seen on the 2003 S-Type which doesn't interfere with he J-Gate as much. The larger glove box gets the high tech treatment with a push button soft deployment. We've gone a long way since the not so distant days where the Jaguar flagship didn't even have a glove box (94 models where the only spot to install the passenger side airbag was where the glove box used to be).

New XJ interior, revised but still very familiar

Center console controls are easy to use and logically organized. The large screen and navigation system does bring a touch of high tech to the dash but again you don't need to spend hours reading the drivers manual to operate this car and its systems... remember the joke about staying clear from BMW series 7 bearing temporary plates... not so on the XJ. This doesn't mean that the new XJ is not on the cutting edge of technology; it does have its share of advanced systems and a long list of fancy acronyms... ARTS (Adaptive Restraints Technology System with sensors to adapt how air bags deploy in an accident)), CATS ( Computer Assisted Technology Suspension, more on that later), ACC (Adaptive Cruise Control where radar technology modulate the car speed to keep a set distance to the vehicle ahead), etc...

Let's drive it!
Enough about the styling, the comfort and the gadgets... the road is where Jaguars shine with their performance and ride quality. I got to test drive the XJR on the Skip Barber autocross course at Lime Rock, sort of a mini road course with cones making it a bit tighter. Road surface is smooth but there are some elevation changes and a couple of challenging spots. Perfect place to evaluate how the new XJ performs.

Autocross courses are normally best left to the lightweight, short wheel base cars. Tackling them with full size luxury sedans can be challenging as they will feel heavier at low speed and much larger than they are. Well, I was in for a surprise and some eye opening laps!

The power of the supercharged engine is no surprise but I can't honestly say that I could feel the 20 additional ponies (up to 390hp) brought by the larger displacement (from 4.0 to 4.2 litre). First introduced on the XK8 sports car in 1996, the 4 litre all aluminum V8 has been significantly upgraded in 2003 with numerous changes including an increase to 4.2 litre. Step on the throttle from a full stop and you are pushed back in the seat as revs climb smoothly toward the redline. The new ZF 6 speed transmission shifts just as smoothly as the previous generation Benz 5 speed used in the XJR/XKR.

Jaguar engines have always been known to give plenty of torque even at low RPM and the new V8 is no exception with 303lb/ft at 4100 rpm for the normally aspirated version and a whopping 399 lb/ft at 3500 rpm for the supercharged. Little need to downshift before passing on the highway in the XJR, in fact when driving at speed in an R model it is often better to switch the transmission sports mode off and tap in all that torque without dowshifting.

2004 XJR in action.

The big surprise came reaching the first corner where the big XJ suddenly felt like it had shrunk, shedding a few inches and a few hundred pounds. Interesting... The design of the 2004 XJ suspension is all new with the Self Leveling Air Suspension being the big news. Owners of older XJ40s might shiver at the idea of Self Leveling Suspension but the new system has nothing in common with the late 80s troublesome hydraulic system. A compressor mounted at the front of the car feeds an air tank at the rear; from there ride height sensors send data to the suspension ECU which in turns controls the spring/dampers units insuring an even ride height regardless of loading. For those driving in places where speed of 100mph can be sustained without fear for their license and insurance premiums, the system lowers the car by 3/4" above 100mph to reduce drag and improve stability.

Jaguar's Computer Assisted Technology Suspension (CATS) is now standard across the range and adjusts damping according to road condition and driving style. Unfortunately, Jaguar still does not provide manual control of the settings, it's all left to the computer. Finally, the programming of the speed sensitive steering also plays a role in how the XJ appears to miraculously shed pounds and inches.

After accelerating out of a couple of corners, I noticed how the traction and stability control system had not gotten in the way of having fun. Stability kicked in a few times activating individual brake calipers but without killing the power; a huge improvement from the over aggressive traction control found in previous models where you won't have fun until you have hit the kill button on the dash. Very nice.

Brakes are impressive, with standard Brembos on the supercharged model, a much needed improvement from the standard brakes fitted to previous generation of R models. Pedal feel is very close to the previous generation XJ, a bit soft which may surprise first time Jaguar drivers but which allows precise brake modulation.

Prices and other details...

2004 XJ8


18" Dynamic wheels


Xenon Headlamps


Premium Sound


Heated Seat Package


Heated Wood and Leather Steering Wheel


Warm Climate Package (4 zone air-con and blinds)


Navigation System


2004 Vanden Plas


Heated Wood and Leather Steering Wheel (requires heated seats)


Warm Climate Package (4 zone air-con)


Navigation System


Multimedia Package


2004 XJR


Warm Climate Package (4 zone air-con)


Multimedia Package


Prices are MSRP as published by Jaguar North America. Taxes and other costs extra...
The competition....
BMW 745


Mercedes S430


Audi A8


Amazingly, despite all the improvements, larger engine and better performance, the new XJ hits the show room at a price that is barely over 2003 model and still at least 13% below its main rivals from Audi or BMW. MSRP on the XJ8 starts at $59,995 with the Vanden Plas retailing at $ 68,995. If you want the "we have lift off" performance of the XJR, MSRP goes to $74,995. At this time, no supercharged Vanden Plas has been announced; as with all XJ sold in the US the base models are fully equipped and the option list is very short.

In some markets where taxation and fuel cost are an issue like the UK and Europe, Jaguar is offering a 3.5 litre version of the V8 engine as well as an XJ6 model featuring a 3.0 litre V6. A diesel is also due out later on this year.

so... is it?
yes... the new XJ is pure Jaguar, no doubt about it, and it raises the bar to new heights. After I test drove an S-Type R about a year ago, I noticed how the revised S was clearly a step above the then current XJR not just in comfort but also refinement and handling; suddenly the XJR showed its age... It was also an indication of things to come and now, a year later, the new XJ is indeed all we expected. Powerful, agile and stunning... Sir Williams Lyons would be proud.


This article is about the generation of Jaguar XJ built from 1997 to 2003. For general XJ information, see Jaguar XJ.

Jaguar XJ (X308)

Jaguar XJ8 (X308)

ManufacturerJaguar Cars
Also calledJaguar Sovereign
Jaguar Vanden Plas [1]
Jaguar XJ Executive
Jaguar XJ Sport
Jaguar XJ8
Jaguar XJR
Daimler Eight
Daimler Super V8
ProductionJuly 1997—December 2002[2]
AssemblyCoventry, England
DesignerGeoff Lawson (1995)
Body and chassis
ClassLuxury vehicle (F)
Body style4-door saloon
LayoutFR layout
Engine3.2 L Jaguar AJ-V8
4.0 L Jaguar AJ-V8
4.0 L superchargedJaguar AJ-V8

5-speed automatic ZF 5HP24

Mercedes-Benz W5A580 Mercedes-Benz 5G-Tronic transmission (Supercharged models only) 1998-2002
WheelbaseSWB: 2,870 millimetres (113 inches)
LWB: 2,995 millimetres (117.9 inches)
LengthSWB: 197 in (5,000 mm)
LWB: 201 in (5,100 mm)
Width69 in (1,800 mm)
HeightSWB: 51 in (1,300 mm)
LWB: 52 in (1,300 mm)
Curb weightSWB: 3,968 lb (1,800 kg)
LWB: 4,134 lb (1,875 kg)
PredecessorJaguar XJ (X300)
SuccessorJaguar XJ (X350)

The Jaguar XJ (X308) is a luxury saloon manufactured and sold by Jaguar Cars between 1997 and 2003. It is an evolution of the outgoing X300 platform, and the exterior styling is nearly identical between the two generations. The major change was the introduction of Jaguar's AJ-V8 as the only available engine. Like all previous XJ generations, it features the Jaguar independent rear suspension arrangement.[3]


The X308 kept much of the same exterior styling as its predecessor, carrying its rounded four-headlamp bonnet, low roofline, sloping tail, and wrap-around rear light clusters. From the front, the two generations can be differentiated by the shape of the indicator lenses (rectangular on the X300, oval on the X308), and also by the shape of the fog lamps and lower valance air intake (both of which are more rounded on the X308).[4] The front and rear bumpers were both changed along with the taillights which had red/clear lenses rather than red/grey lenses. The grill surround and badging was slightly changed. The headlight fixtures also included forward parking lights housed with the brights, new to X308.[5]


The instrument binnacle of the XJ40 and X300 was replaced on the X308 with three large, separate gauges set into recesses in the curved dashboard. Door trim and the design of the center console were also slightly revised.[6]


Having discontinued production of both the AJ16 inline-six and V12 engines, Jaguar offered only its newly designed V8 engine (named the AJ-V8.) It was available in either 3.2 L or 4.0 L form, although certain markets (such as the United States) only received cars powered by the 4.0 L version. The 4.0 L version was also supercharged in certain models.

3.2 L240 bhp (179 kW; 243 PS)233 lb⋅ft (316 N⋅m)ZF 5HP24
4.0 L290 bhp (216 kW; 294 PS)290 lb⋅ft (390 N⋅m)ZF 5HP24
4.0 L supercharged370 bhp (276 kW; 375 PS)387 lb⋅ft (525 N⋅m)Mercedes-Benz 5G-Tronic W5A580

No manual gearbox or limited slip differential option were available for any models. Computer-controlled active suspension was available as a feature named "Computer Active Technology Suspension" (CATS).[7]


Instead of the Daimler marque being used in certain markets, the equivalent "Vanden Plas" models were sold under the Jaguar name.


The base XJ8 came standard with more equipment than had been fitted to entry-level XJs in the past, including leather upholstery, alloy wheels, and air conditioning. The door mirrors and door handles are body-coloured.[8] The radiator grille, windscreen and rear window surrounds, boot lid plinth, and rain gutters were chromed, while the window frames remained matt black. Interior wood trim is walnut. Rear badging reads "XJ8".[9]

For the home market in September 2000, Jaguar began badging the XJ8 model as "XJ Executive", and fitted as standard rain-sensing wipers, a CD player, cruise control, and rear parking sensors.[10]


The Sport model was equipped only with the 3.2 L normally aspirated engine, and, in 2002-2003 in the American market with a 4.0 L normally aspirated V8.[11] It offered stiffer suspension, sportier seating and interior colour combinations, and wider/larger wheels than the XJ8. The windscreen and rear window surrounds were painted matt black, as were the rain gutters and window frames for European markets (the US retains chrome surrounds). The radiator grille has metallic grey vertical slats. Rather than a chrome radiator grille surround, the Sport uses a body-coloured surround. Rear badging reads "XJ Sport".


The Sovereign represented the highest luxury specification for Jaguar models, sitting next to the XJR, which provides the ultimate performance. Sovereigns featured more elaborate/expensive wood veneer, commonly highly figured burr walnut; with window control/ashtray trim panels also done in wood veneer as opposed to plastic in other models. The Leather is also of a higher quality and often features contrasting piping, with seats being of the traditional fluted style. The suspension setup was biased towards touring and the wheels were normally 16" or 17" to provide high profile tyres for additional ride quality. Computer Active Technology System adaptive suspension was also offered as a rare option.

Externally a Sovereign can be distinguished by the complete use of highly polished steel/chrome work around windows and rear light clusters; as well as polished radiator grill and boot garnish. The cars are simply badged as "Sovereign" with no mention "XJ".

Jaguar also released a long wheelbase version of the Sovereign in 1998. The difference being that the car is around 4 inches longer, with the rear doors being noticeably longer than the front; there is also correspondingly taller rear roof profile to provide additional headroom. The Long wheel base version provided considerably more rear legroom and made the XJ a true limousine.


The XJR is powered by the supercharged version of the 4.0 L V8. It is also equipped with sport suspension, wider wheels and tires, and matte-black exterior window trim (except in the US market, where the XJR was given chrome window frames and rain gutters.) Like the Sport model, the XJR has a body-coloured radiator grille surround, but with a stainless-steel mesh insert rather than the normal vanes. Other exterior touches include the "XJR" rear badging and larger exhaust outlets.[12]

Available on late XJR models was an "R1" performance option. This included 18" BBS wheels, larger Brembo brakes with cross-drilled rotors, and re-tuned suspension.

The XJR was capable of reaching 60 mph (97 km/h) from a standstill in 5 seconds, with an electronically limited top speed of 155 mph (249 km/h).

In 2001, to commemorate the 100th anniversary of Sir William Lyons' birth, Jaguar produced five hundred examples of a special-edition model named the "XJR 100". Only available in the Anthracite exterior color with charcoal leather upholstery, the interior is trimmed with contrasting red stitching and birdseye maple. It is fitted with a leather-covered sports steering wheel and MOMO shift knob. The XJR 100 uses the Brembo brakes otherwise found on the R1-equipped XJR, plus 19" "Montreal"-style wheels manufactured by BBS.[13]


Produced only in 2002, the SE (Special Equipment) model was fitted with more equipment than the original base model, and was offered at a competitive price. The rear badging read "SE", and the cars were fitted with reverse parking sensors as standard.[14]

Daimler/Vanden Plas[edit]

The top-of-the-range Daimler marque (sold as the Vanden Plas model in certain markets like the United States) features softer suspension and all available luxury features. They are cosmetically differentiated by the traditional Daimler fluted radiator grille surround and fluted boot-lid plinth.

The Daimler and Vanden Plas cars were also available with the supercharged engine otherwise found only in the XJR. This model was named the Daimler Super V8. In the US market, this combination was available only as a special order though 2001 (with these cars identifiable by their "Vanden Plas Supercharged" rear badging). For US model years 2002 and 2003, the equivalent Super V8 model was then offered. These supercharged long-wheelbase variants were also fitted with Jaguar's proprietary "Computer Active Technology System" (CATS) adaptive suspension.[15] The "Sports" setup from the XJR application, however, is replaced by a "touring" set-up, exclusive to supercharged Daimler and Vanden Plas variants.[16] It is softer and more compliant than the XJR's Computer Adaptive Technology Suspension system.[15]

Production numbers[3][edit]

XJ8 3.220,235 (including Executive and SE)
XJ8 3.2 (LWB)771
XJ8 3.2 Sovereign2,095
XJ8 3.2 Sovereign (LWB)385
XJ8 3.2 Executive
XJ8 3.2 SE
XJ8 4.08,369
XJ8 4.0 (LWB)148
XJ8 4.0 Sovereign36,635 (including SE)
XJ8 4.0 Sovereign (LWB)11,566
XJ8 4.0 SE
XJR 100500
4.0 Vanden Plas (SWB)1
4.0 Vanden Plas (LWB)21,080
4.0 Vanden Plas Supercharged788
Daimler Eight (SWB)164
Daimler Eight (LWB)2,119
Daimler Super V8 (SWB)76
Daimler Super V8 (LWB)2,387


Gear stick in the XJR 100
Rear of a Daimler Super V8

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