The XKR-S Convertible is the drop-top variant of the XKR-S Coupe, which Jaguar describes as the “most responsive, powerful, agile, and driver-focused production car” the automaker has ever built. Improvements over the plebeian XKR Convertible include a stiffened suspension, even more prodigious levels of power and a unique look inside and out.
Thanks to its "Lightweight Vehicle Technology" architecture, the XKR-S Convertible does not need the traditional extra stiffening panels seen on many other convertibles – Jaguar’s engineers could simply apply the changes that created the XKR-S Coupe into the convertible without compromising performance, agility or refinement.
The heart of the XKR-S Convertible is its supercharged 5.0-liter V8, a direct injected unit that makes 550 horsepower and 502 lb-ft of torque, levels that surpass even that of Jaguar’s XJ220 supercar from the early 1990s. Remapping the engine's fuelling characteristics and increasing exhaust gas flow through the use of an active exhaust system helped liberate the extra ponies from the engine, which makes 510 horsepower in the XKR Convertible.
The motor hooks up to a quick-shifting six-speed automatic transmission that offers up smooth, rev-matched downshifts and helps the car return 15/22 mpg, which is just good enough to avoid the gas-guzzler tax. Jaguar quotes a zero-to-60 mph time of 4.2 seconds, though that figure is likely conservative by at least half a second, while top speed is electronically limited to 186 mph.
Helping to ensure that handling is up to the brutal straight-line quickness is a hardened suspension that features reworked aluminum front suspension knuckles, a revised rear geometry and stiffer springs and dampers. Jaguar also added lightweight forged alloy wheels, recalibrated the steering effort to minimize any response delays and added a torque-vectoring rear differential to produce more agile and connected driving dynamics.
Realizing that the performance equation wouldn’t be complete without a potent braking system, Jaguar bestowed the XKR-S Convertible with cast iron and part aluminum monobloc calipers along with internally ventilated brake discs (measuring 380mm at the front and 376mm at the rear) that provide repeated, fade-free stopping power.
Signaling the sporting intentions of this fast cat to the world is a unique front end with twin nacelles, side intakes and a carbon-fiber splitter. Extended side sills emphasize the low ride height, while around back there’s a carbon fiber diffuser and a rear wing with carbon-fib centre section. Overall, the look is aggressive while still maintaining the Aston Martin-like elegance of the normal XK.
The XKR-S Convertible’s roof is a power-latching, self-stowing system with three layers including Thinsulate insulation and a Rakona headliner. When the top is down, an aluminum tonneau cover conceals the canvas roof. Stowing the top can be accomplished in 18 seconds.
Inside, the cabin benefits from seriously bolstered front seats that hold occupants firmly in place during spirited maneuvers, which are affected by the use of a unique leather-wrapped, multi-function steering wheel. Other unique touches include ebony soft-feel paint for the switches and gloss black finish to the centre console, new carbon leather accents covering the seats and a special Dark Linear Aluminum finish is available as an alternative to the traditional Jaguar wood trim.
Befitting the car’s substantial price tag, a range of luxury features such as heated seats, a touch-screen navigation system and premium stereo are fitted as standard.
Safety features such as dual front, side and side-curtain airbags are fitted as standard, as are traction and stability control systems.
Key Competitors
Those lusting after the XKR-S Convertible should do their best to fall in love with a Porsche 911 Turbo S Cabriolet, an Aston Martin V8 Vantage S Roadster or a Mercedes-Benz SL63 AMG instead. Why? Because each of the 25 examples of the XKR-S Convertible offered to American buyers has already been spoken for.