The first Jaguar car to be created under the leadership of Design Director Ian Callum, the dramatic and purposeful XK, is receiving a number of additions for the 2015 model year that add to its palette of impressive performance technologies and luxury features.

Two special edition models will be available in exclusive Signature and Dynamic R specifications. The 2015 Model Year XK line-up now comprises Signature, Dynamic R and R-S derivatives.

The luxury focused XK Signature model – with a 385PS 5.0-litre V8 engine – is fitted with a host of additional features including standard 20” Kalimnos wheels and Reverse Park Camera, while the performance focused 510PS 5.0-litre supercharged XK Dynamic R – based on the existing XKR – offers Black Dynamic Pack, which incorporates XKR-S suspension and dynamics and a 10mm reduction in ride height, plus Speed Pack, which equips the car with an Aerodynamic Pack and an increased top speed of 174mph. A Performance Active Exhaust is also standard equipment.

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The supercharged 5.0-litre V8 engine is fitted to both XK special edition cars. Now in its third generation, this engine offers not only tremendous power but also great efficiency by incorporating the very latest technology including spray-guided direct injection (SGDI) and dual independent variable cam timing (DIVCT). Like the car itself, the engine is constructed from high-grade, lightweight aluminum, which in the cylinder heads is recycled to reduce the environmental impact of manufacture.

The XK Signature can reach 60 mph in 5.2 seconds in Coupé guise, and 5.3 seconds for the Convertible, each car producing a meaty 515Nm of torque. The top speed for both variants is electronically limited to 155mph and both cars produce just 264 g/km of CO2. The XK Dynamic R’s 5.0-litre supercharged V8, offers power and torque figures of 510PS and 625Nm respectively, taking the car to 60mph in just 4.6 seconds with a limited top speed of 174mph. Extremely powerful but also efficient, the XK Dynamic R emits 292g/km of CO2.

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Standard on the XK Signature are Luxury seats available in Ivory or Charcoal soft grain leather. The interior also features Canvas Suedecloth headlining, Figured Ebony veneers and Bright Metal sport pedals.

The XK Dynamic R boasts Jaguar’s new diamond sewn Performance seat in either Ivory/Charcoal soft grain leather with Ivory contrast stitch or Charcoal/Red soft grain leather with Red contrast stitch leather. Featuring integrated head restraints and increased lateral and squab support, the new seats hold driver and passenger securely and comfortably in place. The 16-way adjustment of squab, cushion, lumbar and bolster elements is supplemented by memory and heating functions. The interior Jet Suedecloth headliner is complemented with Piano Black veneers. Bright Metal sport pedals are also fitted as standard.

The central seven-inch touch-screen provides an intuitive interface for the extensive technology that is seamlessly incorporated into the XK, including iPod and USB connectivity and satellite navigation with DVD mapping. The central screen also projects the image from the new Reverse Park Camera, which is fitted as standard to both special edition cars.

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The XK Signature comes with 20’’ Kalimnos wheels as standard, with 20” Takoba wheels available as an option, while the XK Dynamic R has 20” Vortex diamond turned wheels – with distinctive Red painted brake calipers – and the option of 20” Vulcan Gloss Black lightweight alloys.

Both the XK Signature and Dynamic R editions are available with a choice of exterior body colours – Polaris White, Ultimate Black, Stratus Grey, Italian Racing Red, Dark Sapphire and British Racing Green.

First deliveries to UK customers of the new XK Signature and Dynamic R editions are expected in March