Our experience with the Portfolio took place in Las Vegas, where Jaguar had invited us to drive a trio of XJ models. Though the focus of our trip to Sin City was the Portfolio model, company representatives also set aside time for us to drive the 2006 XJ Super V8 and the 2006 XJ Vanden Plas. While the Vanden Plas provided a smooth ride, its 300 horsepower (up from 294 for ’05) obviously paled in comparison to the 400 ponies from the Super V8 and Portfolio. Our drive route took us out of Vegas and into some beautifully remote areas of Nevada. The long straight-aways and sweeping curves along barren roads were perfect for high-speed runs and accelerated cornering. After a jet-like launch, our Super V8 tester quickly reached the triple-digits, hunkered down, and its speedometer continued to climb steadily, to the point that this supercharged sedan had more power than we or the road could safely accommodate. Yet even at such velocity, the ride was tight and controlled, the steering responsive, and the ride comfortable. The same was true for such runs in the Portfolio, though the 20-inch rubber felt less in tune with the road at higher speeds, which was, to say the least, a bit disconcerting. Both the Super V8 and Portfolio felt secure in the corners, but like the 2005 Jaguar XJ Super V8 we previously tested, this long wheelbase, 4,065-lb. luxury sedan felt a bit too expansive to be nimble. But, make no mistake, step on this cat’s tail and she’ll scream; stomp on the brakes, and she’ll dig her claws in just as fast.

There’s no denying that the 2006 Jaguar XJ Super V8 Portfolio is a very expensive piece of machinery that goes fast, stops fast, and handles well. However, the real story is inside the car. That Conker leather is soft, but it takes an acute tactile sense to notice any real difference from the hides in other XJs. With 400 watts, the Alpine audio system does a good job of filling the cabin with good sound, while the laminated windows do an outstanding job of keeping unwanted noise out. There’s a bit of rumble from those massive wheels, though it’s not intrusive, and the supercharger whine is a pleasant song to driving enthusiasts.

Remaining on the Portfolio’s short list of unique features are the rear seat console, black walnut wood treatment, and suede trim. Handy audio/DVD controls and inputs are located in the center console, placed behind two cupholders and forward of a deep, lined storage pocket. It’s a comfortable and convenient setup, though not noticeably better than the fold-down armrest and full seat found in the Super V8. And while that walnut trim adds a nice touch, it too-closely resembles 1970’s-era basement paneling. The suede fabric, on the other hand, is the Mackizzle Dadizzle (that’s a good thing).