Sleek, sensual, lithe, agile, elegant are just a few of the many positive words used to describe the venerable Jaguar XJ sedan during the 35 years it has graced the auto scene. Yet there have been some negative comments. Among them was that the XJ was too small inside.

It was imperative to increase the interior space in this new XJ if it were to be true large luxury sedan because we're all getting bigger, according to Jaguar's demographic research. The new XJ offers plenty of interior space for front passengers and dramatically increased room for rear passengers. As expected of Jaguar's flagship, the new XJ swaths its occupants in traditional British luxury with rich wood and leather while sparing us unnecessary gee-whiz features.

Sleek and big generally don't go together, yet Jaguar engineers and designers have craftily created a bigger car that doesn't look or feel bigger. Styling changes are subtle, but the XJ looks like a big cat ready to pounce. It is a beautiful car.

The XJ's dynamic looks are not deceptive. Stand on the gas and a powerful new 4.2-liter V8 engine thrusts the XJ8 to speed, benefiting from a new six-speed ZF automatic transmission. The 390-horsepower XJR sprints from 0 to 60 in just 5 seconds and hits its rev limiter at 155 mph. Once at speed, the XJ is smooth and quiet.

In spite of its substantial increase in size, the new XJ is considerably lighter than the old model. The XJ bodyshell is made entirely from aluminum. Lighter and stiffer, the new XJ monocoque is more like an airplane's fuselage than a traditional car body. In addition to its rigid new chassis, the XJ comes with a sophisticated suspension that offers a smooth ride and impressively good grip.

Sleek, sensual, lithe, agile, elegant are words that are even more apropos to the all-new XJ.