What is it?
A facelifted version of Jaguar’s 543bhp XJR. Outside of some minor cosmetic and equipment tweaks, including a more modern infotainment system, the key update is the addition of electronic power assistance to the steering.
Jaguar says the conventional hydraulic rack, which previously featured in the XJ and XJR, had: “reached the limits of its potential.” That might sound like an odd statement, given that all you want is to have the rack communicate your inputs to the front wheels and deliver appropriate feedback, but then a lot more is expected from cars these days.
Consequently, fitting electromechanical power assistance grants two benefits: an an improvement in efficiency and the ability to support more advanced driver assistance systems that require steering control.
There are fewer parasitic losses with an EPAS system, which Jaguar claims can reduce fuel consumption by up to 3%. A moot point for most considering cars in this class, perhaps, but for a manufacturer those minor improvements can add up quickly.
In an effort to quell those concerned about its fitment, the company is also keen to stress that the system responds and feels far better than the previous hydraulic set-up did. We've always liked the way the XJ and XJR drive, so hopefully its fine handling hasn't been affected.
One thing the XJR never lacked was power, however, which is why you’ll find the supercharged all-aluminium 5.0-litre V8 unchanged. It still churns out a stout 543bhp and 503lb ft, allowing the XJR to sprint from 0-60mph in 4.4sec.
What's it like?
We had just three laps of the Silverstone track in which to find out whether the addition of electronic power steering had tainted the XJR. Fortunately, however, it was immediately clear that it hasn't detracted from the Jaguar's driver appeal at all.
There's plenty of weight to the steering, and that weight builds progressively as the speeds and angle increases. It's got a slick, smooth action to it, making it easy to adjust, and you're further kept involved by a plentiful amount of feedback. You're ever conscious of the sheer mass of the otherwise agile Jaguar, but it rarely feels as weighty from the behind the wheel as the numbers suggest it might.
The XJR is also still a deceptively fast car, especially once moving. The supercharged V8's substantial urge means that 30mph-80mph takes seemingly no time at all, and it continues to pull with conviction deep into triple figures.
Strong brakes with good pedal feel make it quick and easy to then bleed off that speed, while the Jaguar's firm suspension keeps the body in check through the corners. The eight-speed automatic does a fine job on track, too, changing gears quickly when manually commanded and rarely getting flustered during more aggressive driving.
All in, it's a satisfying and confidence-inspiring car to drive fast, further aided by elements such as an easily modulated throttle and switchable stability modes that allow a modicum of oversteer while retaining an electronic safety net.
The XJR's engine is still a bit quiet, though, and the option of a louder exhaust system would be appreciated. There's still no ancillary instrumentation either, so you can't view boost pressure or other readouts you might consider relevant.
Inside, it's much the same as before, but the new InControl Touch Pro media system is a significant step up in both functionality and quality. The cabin and kit is still not on a par with an Audi or Mercedes-Benz, though, but it's a step in the right direction.
The seats offer a lot of support - on our brief track blast at least - while a wide range of adjustments make it easy to find your preferred driving position. It's still not particularly spacious in the back, though, which is a shame given the car's overall size.
Should I buy one?
The Jaguar remains a good choice for those seeking a powerful luxury saloon that feels great from behind the wheel. That said, it'd be a close-run thing between this and a new Audi S8, particularly in Plus specification.
For one thing, the Audi offers a finer finish and a more modern feel. Many would also likely appreciate the tractability offered by its four-wheel drive system, which makes it far more docile in poorer conditions. It's also quicker from 0-60mph, although not as engrossing to drive as the XJR. Maximum involvement or a better overall package? You choose.
If the likes of the Mercedes-AMG S63 had been on your radar, however, then the Jaguar has one key card to play: value. It's a substantial £29,935 less than the S63, which may make it far more worthy of consideration.
Myself? I'd have a Cadillac CTS-V. Sure, it's a left-field, left-hand-drive option that may prove too oddball for most, but it's faster, sounds better, is more entertaining and far less expensive.
2015 Jaguar XJR
Location Silverstone; On sale Now; Price £91,755; Engine V8, 5000cc, supercharged, petrol; Power 543bhp at 6000-6500rpm; Torque 502lb ft at 3500-4000rpm; Kerb weight 1875kg; Gearbox 8-spd automatic; 0-60mph 4.4sec; Top speed 174mph (limited); Economy 25.5mpg (combined); CO2/tax band 264g/km, 37%