milankregar je napisal/-a:To je pa čisto novi Jaguar XK-R. A obstaja na svetu še kaj lepšega?

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milankregar je napisal/-a:To je pa čisto novi Jaguar XK-R. A obstaja na svetu še kaj lepšega?

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The Jaguar XKR-S: a lightweight sports coupe that takes the Jaguar sports car experience to a new level. As the fastest production XK to date, it delivers a combination of high speed performance, dynamic excellence and crafted luxury that is unique to Jaguar.

At-a-Glance

- The new XKR-S coupe is the fastest production XK to date, providing the Jaguar enthusiast with an even more driver-focused high speed performance experience

- Limited to 200 cars – available only in Europe, in both right-hand and left-hand drive

- The XKR-S is capable of 0-60mph (0-100kph) in 4.9 (5.2) seconds and has a maximum speed, electronically limited, of 174mph (280kph) – making it the fastest Jaguar since the XJ220 supercar

- Revised suspension with bespoke springs, dampers, anti-roll bar and recalibrated Computer Active
Technology Suspension (CATS) further improve the XKR's outstanding ride and handling balance

- Exterior styling features revised front air-splitter and side sill-extensions, revised rear spoiler and rear bumper with unique diffuser panel and unique 20" lightweight Vortex alloy wheels

- Ultimate Black metallic paint colour with contrasting finish to the grille, sills, side power vents and rear diffuser

- Alcon R Performance braking system with red monobloc six-piston callipers and 400mm brake discs at the front, 350mm at the rear

- Six-speed automatic transmission with Jaguar Sequential ShiftTM for ultra-quick manual gear shifts in milliseconds, using steering-wheel-mounted paddles

- Active Exhaust System ensures refinement at cruising speed but purposeful V8 roar under hard acceleration

- Strong, lightweight and exceptionally rigid all-aluminium body construction delivers excellent dynamic agility

- The luxury sports interior features full soft-grain leather with twin-needle contrast stitching, adjustable seat bolsters, Piano Black veneer, Charcoal Alston luxury headliner plus the XKR's comprehensive standard specification

- Bowers & Wilkins surround sound system, with 525W Premium audio, featuring low distortion Kevlar mid-range speakers and aluminium dome speakers, designed and tuned specifically for XK

- In summary, the ultimate Jaguar XK and a perfect illustration of Jaguar’s philosophy of building beautiful, fast cars.


The XKR-S coupe is the fastest production XK to date. Powered by Jaguar's acclaimed 4.2litre V8 supercharged engine, it has been developed for the true Jaguar enthusiast. It is faster and more agile than the XKR, taking the Jaguar sports car experience to a new level, whilst retaining the refined, dynamic excellence and crafted luxury that is unique to Jaguar.

Sharing the XKR’s highly advanced lightweight aluminium body architecture, the high performance of the XKR-S is made totally accessible by the enormous reserves of the 4.2-litre all aluminium four-cam supercharged V8’s 420bhp (SAE) and 560Nm of torque.

With recalibrated engine management, the XKR-S reaches an electronically limited top speed of 174mph (280kph) – 19mph (30kph) faster than the XKR. This additional performance is made accessible by improved aerodynamics (reduced drag and lift) and unique suspension set-up.

Sharing the XKR’s class-leading six-speed sequential automatic transmission, the
XKR-S has exceptional refinement and the option of ultra-fast manual shifts controlled by steering wheel-mounted paddle shifts – with shift times measured in milliseconds to make this one of the fastest shifting transmissions in the world.

To match its increased performance, the XKR-S adopts the most powerful brakes on any Jaguar production model, plus extensive changes to its suspension and steering to provide further enhanced ride and handling characteristics without compromising comfort.

The high performance braking system for the XKR-S was developed by Jaguar’s Special Vehicles team in partnership with British competition brake specialist Alcon, which supplies the stopping power for some of the fastest cars in the world, on both road and track. The brakes were perfected over thousands of miles of testing on some of Europe’s most demanding roads, and by Jaguar’s engineering team at the Nurburgring in Germany. The XKR-S Alcon R Performance braking system features 400mm diameter discs on the front and 350mm discs at the rear. Each disc is radially ventilated for maximum cooling and to resist fade even under the hardest use, and will perfectly match the XKR-S’s increased top speed. The friction surfaces of each disc carry a series of crescent-shaped grooves that help clear water from the discs during wet weather and help to keep the brake pads clean at all times. The Alcon R performance brake package uses lightweight monobloc six-piston callipers at the front and four-piston callipers at the rear – each calliper finished in a distinctive red and carrying the R logo.

The XKR-S coupe’s dynamic balance focuses on achieving an even more sporting character while retaining the XKR’s supple ride comfort. Its blend of control and refinement begins with the extremely stiff all-aluminium body structure, and a re-tuning of the XKR’s all-wishbone suspension. The XKR-S features new springs, new anti-roll bars and unique dampers. All the major suspension parameters are recalibrated, and the XKR-S uses Jaguar’s proven Computer Active Technology Suspension (CATS) with unique tuning. It also uses a faster ratio steering rack, for quicker reactions and optimum feel.

The limited edition coupé in Ultimate Black is identified by the unique XKR-S badge on the rear of the car. The exterior of the XKR-S has been subtly enhanced to make it recognisably different without being overstated. Another significant element in the revised handling package is that the ride height of the XKR-S has been reduced by 10mm compared with that of the XKR, and the XKR-S sits on unique, lightweight 20-inch Vortex forged alloy wheels with bespoke tyres. That naturally makes the XKR-S look lower and even more sporting, but it has a number of other distinguishing details. It features a new front aerodynamic splitter, side sill extensions, revised rear spoiler and rear diffuser panel, with contrasting finishes to details such as the front mesh grille, power vents, sills and rear diffuser panel.

The XKR-S has an Active Exhaust System, which is specifically tuned to ensure quiet, refined high-speed cruising while producing a much more hard-edged and sporting V8 sound under hard acceleration – not over loud, but full of performance character.

While the mechanical specification and the exterior revisions are driven largely by performance and dynamic enhancement, the interior changes reflect Jaguar's vision of the XKR-S as an uncompromisingly luxurious sports car.

The full soft grain leather trim is finished in Charcoal with Ivory twin-needle contrast stitching, with leather wrapping the seats, instrument panel top, centre console, inner door panels and rear side panels. This is complemented by Piano Black veneer, Charcoal Alston luxury headlining, plus a revised instrument cluster - calibrated to accommodate the higher top speed - with XKR-S branding. The contrast-stitched leather trimmed steering wheel, alloy and leather gear selector with alloy surround, bright aluminium pedals, and XKR-S branded head-restraints, tread-plates and carpet mats further set the tone for this very special interior.

Taking Jaguar's 525W Premium Audio system with Pro Logic II surround sound as a starting point, renowned premium British loudspeaker manufacturer Bowers & Wilkins has tuned a signature speaker system specifically for the cabin of the XKR-S. High output, low distortion Kevlar mid-range speakers and specially designed aluminium-dome tweeters deliver superb mid-range and extended high-frequency responses.

On sale in summer 2008 and limited to just 200 cars in European markets only, the XKR-S is an even more driver-focused sports grand tourer than the XKR.

The pinnacle of the Jaguar sporting range - the XKR-S - is now joined by a convertible which offers the same enticing blend of abilities, while offering driver and passenger a heightened connection with their surroundings.

The XKR-S Convertible embodies all the characteristics that have always defined legendary Jaguar GTs - explosive performance, involving handling, relaxed comfort and discreet luxury - while taking Jaguar into a new performance echelon. The new XKR-S model line-up sits at the pinnacle of the XK range, which now consists of XK, XKR and XKR-S derivatives in coupe and convertible format.

The XKR-S Convertible takes the raft of performance, dynamics, design and interior upgrades already introduced to much acclaim on its coupe sibling to create Jaguar's fastest ever open-topped GT.

Adrian Hallmark, Jaguar Global Brand Director, says the new XKR-S Convertible represents the pinnacle of performance and glamour in motoring:

"There is nothing as liberating as life behind the wheel of an open-topped Jaguar and the new XKR-S Convertible takes the Jaguar GT experience to new heights."

The building block for the car's explosive performance is an uprated version of the 5.0-litre supercharged AJ-V8 engine, which produces 550PS (405kW) and 502lb/ft (680Nm) of torque. These figures represent a power increase of 8 percent and torque increase of 9 percent over the Jaguar XKR. Driving the rear wheels through a six-speed automatic gearbox with Active Differential, this propels the XKR-S Convertible to 60mph in 4.2 seconds (0-100km/h in

4.4 seconds) and on to an electronically limited top speed of 186mph (300km/h).

Underpinning this potent performance is a comprehensive package of suspension upgrades which refine the XK's dynamic abilities still further, creating an intimate connection between the car, the driver and the road, enhanced still further in this open-topped GT.

The lightweight aluminium structure of the XK has huge torsional rigidity, allowing the fitment of suspension components such as a redesigned aluminium front steering knuckle and revised rear geometry, stiffer springs and dampers. Allied to lightweight forged wheels and recalibrated steering settings this has allowed Jaguar's vehicle dynamics experts to create a supremely agile, connected driving experience with no loss in refinement.

Reflecting the car's uprated dynamic abilities are interior and exterior styling changes. Externally the XKR-S Convertible is dramatically differentiated from other XK models with carefully calibrated aerodynamic aids that allow it to perform flawlessly at very high speeds.

This sense of drama is continued inside the car with Jaguar Performance seats that feature increased support for driver and passenger during high-speed cornering. The seats are finished in carbon leather and feature 16-way adjustment and heating while carbon is also used to trim the cabin and emphasise the car's assertive nature.

Design

Extensive Computational Fluid Dynamics, wind tunnel and track work has resulted in the aerodynamic design changes applied to the XKR-S Convertible. These perform an essential function in maintaining stability in an open-topped car capable of speeds as high as 186mph (300km/h).

These aerodynamic design changes give the front of the car a dramatic and bold appearance. Vertical feature lines run down from the edges of the oval air intake into a new bumper design which incorporates a wider, lower air intake, a carbon fibre splitter and twin side nacelles. At the edges of the bumper, vertical panels channel air down the side of the car along new sills, which serve to both smooth the horizontal airflow and emphasise the 10mm reduction in ride height.

A unique rear wing with a carbon fibre inlay works in conjunction with a rear apron featuring a carbon fibre diffuser. The result is a reduction in overall lift of 26 percent and balanced aerodynamics front and rear to keep the car perfectly pinned to the road.

The exterior changes are highlighted by the application of gloss black to the exterior brightwork, complemented by the dark technical finish of the lightweight, forged 20" Vulcan design alloy wheels through which can be seen the Jaguar High Performance Brake calipers finished in either an eye-catching red or discreet gunmetal. The XKR-S Convertible is available in a range of six colours, including Polaris White and British Racing Green, a tribute to Jaguar's competition heritage. The acoustically treated hood opens and stows in just 18 seconds and has been proven at the car's maximum speed. It comes in black as standard with a further six optional colours available.

"Taking the track-oriented ethos of the XKR-S Coupe and applying it to a convertible is very exciting. There is a real spirit and thrill to driving with the roof down and in a car capable of these speeds that is going to be exaggerated to create a very dramatic and special experience."

Ian Callum, Director of Design, Jaguar Cars.

Performance

The engineering integrity of the acclaimed AJ-V8 petrol engine, now in its third generation, meant that Jaguar's engineers could derive the extra power and torque needed for the XKR-S. The advanced design of the quad-cam, all-aluminium AJ-V8 incorporates spray-guided direct injection and variable valve timing for great efficiency as well as prodigious power. The Roots-type twin-vortex supercharger nestling in the 'V' of the engine has twin intercoolers and is 20 percent more thermodynamically efficient than its predecessor.

The result is 550PS and 680Nm, allowing the XKR-S Convertible to accelerate from a standstill to 60mph in just 4.2 seconds (0-100km/h in 4.4 seconds) and on to an electronically limited top speed of 186mph (300km/h).

Liberating an extra 40PS and 55Nm over and above the XKR entailed remapping the fuelling characteristics and increasing exhaust gas flow though the use of an active exhaust system.

With the roof lowered on the XKR-S Convertible the Performance Active exhaust system delivers an authentic, race-car inspired soundtrack that has been tuned to provide the driver with a thoroughly exhilarating driving experience.

Dynamics

With the XK model designed as a convertible from the outset, Jaguar's engineers were able to apply the changes that created the XKR-S Coupe into the open-topped GT without compromising performance, agility or refinement.

Jaguar pioneered the use of aluminium in series production cars and it is this metal's low mass and high tensile strength that gives the XKR-S such a breadth of abilities. A kerb weight of 1795kg and torsional rigidity of 16,500

Newton metres per degree provide Jaguar's engineers a solid foundation on which to apply the detail changes that create the company's most involving convertible ever.

Both front and rear suspension systems have been revised. A new aluminium steering knuckle in the front double wishbone suspension increases camber stiffness by 23 percent to provide even greater levels of steering accuracy and feedback. To increase stability and control, the Active Differential has been uprated to reduce steering sensitivity at very high speeds.

Rear damper top mounts have been stiffened over and above the changes found on the XKR-S Coupe while the rear wheel steer effect has been optimised for agility. Spring rates front and rear have been increased by 28 percent while a bespoke Adaptive Damping programme for the XKR-S maximises body control, traction and grip.

Unsprung mass has been reduced by nearly five percent through the fitment of lightweight, forged alloy wheels, which also offer greater traction and grip levels thanks to wider rear tyres that were specifically developed for use on the XKR-S and serve to increase the size of the tyre contact patch. The XKR-S convertible rides on Pirelli P-Zero tyres (255/35 ZR20 at the front and 295/30 ZR20 at the rear).

In order to allow the enthusiastic driver to enjoy the benefits of these changes, the Dynamic Stability Control system has undergone bespoke changes. In Trac DSC mode, specific traction, stability and Active Differential settings reduce intervention levels and enhance mid-corner adjustability, allowing the exhilarating handling to be safely exploited to the full.

The Jaguar High Performance Braking System fitted as standard is more than a match for the car's seductive performance. Huge brake discs - 380mm front and 376mm rear - in combination with aluminium calipers and pad area increases of 44 percent front and 31 percent rear in comparison to the XK provide confidence inspiring levels of power, stability and feel.

"Because the XK was designed as a convertible it has great structural integrity. This allowed us to apply the XKR-S coupe's sporting suspension settings to create a convertible with no compromises. Its blend of great speed, precision and dynamism is given an extra dimension with the roof down and that thrilling exhaust soundtrack."

Mike Cross, Chief Engineer, Vehicle Integrity

Interior

With the convertible hood stowed away, the interior of the XKR-S will be subject to as many envious glances as the exterior, with both highlighting the car's high performance intent.

Exclusive to the XKR-S models are carbon-leather trimmed versions of Jaguar's Performance seats which feature integrated head rests, racing harness cut-outs and increased side and squab support to hold driver and passenger securely during high speed cornering. The 16-way adjustable, heated seats feature highlights of carbon leather and contrast micropiping unique to the model.

Superb tactile interfaces are provided by the multifunction three-spoke leather-wrapped steering wheel and Jaguar-embossed bright stainless steel pedals. Other premium surfaces include soft-feel paint for the switches and a gloss black centre console. An exclusive dark aluminium finish is available as standard with an optional Piano Black finish also available.