So does it drive any differently? Not really, though it is all too easy to hit the ground with that deep new front spoiler as you tackle speed humps in town – even the stiffer sports suspension fitted to our test car failed to stop that long front overhang pitching into the deck when traffic calming was attacked at anything more than tortoise-pace. On the plus side, an extra pair of exhausts gives Jaguar’s flagship a suitably demonic blast under full throttle, overlaid by a sweet whistle – open the windows and it’s almost enough to drown the insistent whine from that Eaton blower up front.
Otherwise the experience is stock XKR, with the new car carrying over the updated drivetrain of the 2003 model year cars (4.2-litre AJ-V8 engine, six-speed ZF automatic transmission). Once again, that’s no bad thing, because the XKR is a pleasure to steer. Any thoughts that a 395bhp rear-drive coupé must have a manual ’box are dispelled once you’ve slipped the J-gate lever into drive and experienced the quality of the change. Apart from a split-second throttle delay it’s faultless: quick, smooth and silent.
Then there’s the chassis, whose ability to mate surprising agility (for a beast of this bulk) and a near-unbelievable ride for a car fitted with sports suspension and (optional) 20in rims remains a joy. Along with revised settings for CATS (Computer Active Technology Suspension) and beefed up springs and anti-roll bar, the ‘Coupé Handling Pack’ fitted to our test car offers retuned steering with extra heft. But though the XK turns in alertly enough for a car of its size, it’s the LDV Vans Trophy next to the Porsche 911’s FA Cup, and its ponderous reactions contribute to the XK feeling less wieldy than its S-type sibling.
That said, for a car of its girth the XKR corners neatly with vast reserves of grip from its Pirelli P-Zeros. On the track a bootful of revs will persuade it into gentle and predictable oversteer, but with no limited-slip differential the inside tyre tends to spin away much of the power. On the road the vast 285/30 ZR20 tyres that wrap around those gorgeous rear BBS split-rims are all but unshakeable, but drive in a downpour and it’s best to treat the throttle with respect if you don’t want its 399lb ft of torque to send the Dynamic Stability Control into a nervous breakdown.
Initial brake-pedal feel is on the soft side, and when trying to slow you really feel the car’s 1735kg weight, but press harder and the pedal loads up and the massive cross-drilled discs and four-piston Brembo calipers (painted red on our test car for an extra £495) with Emergency Brake Assist do their work effortlessly.
At 5.2sec from 0-60mph the XKR is no slouch off the line, but it’s mid-range performance that feels most impressive. It’s quick enough, in fact, for Jaguar to offer an Automatic Speed Limiter, set using the simple wheel-mounted cruise control buttons, to prevent you exceeding a pre-selected maximum.
While the XKR’s qualities behind the wheel are almost a given, when we drove the XK in 2002 it was let down by its dated interior. Two years later and it feels another two years older – the cabin of the new BMW 6-series feels space-age by comparison. In the front it’s cramped, particularly for six-footers, who will find the low roofline oppressive. And you can forget about getting into the back if you’re old enough to know your two-times table.
Ahead of the driver the great slab of a dashboard is unlovely, with plastics that feel out of place in a near-£60k car, and the optional (£2235) satellite navigation is slow and unclear compared to the excellent touch-screen system of Jag saloons. In an effort to liven things up there are new Elm and Piano Black veneers, black instead of grey window surrounds and an optional aluminium pack – surrounding pedals, gear selector and dials with the shiny stuff.
At £57,402 the XKR is hardly cheap – nearly £800 costlier than the quicker Maserati 4200GT or Porsche 911 Carrera and more than £7000 over the modern and surprisingly rapid BMW 645 Ci. Factor in the Technology Pack (adaptive cruise control, premium sound and sat-nav), Coupé Handling Pack and various other options fitted to our test car and its £66,905 price tag seems pretty astronomical.
But the XKR still deserves its place in Jaguar’s range, and will always attract a loyal band of followers thanks to its ability to a huge waft factor and the grip and agility to tackle a favourite road very quickly when necessary. Think of it not as a Porsche rival but instead as a budget Aston Martin or Bentley, and it starts to make a lot more sense.