The introduction of any new Jaguar XJ range opens a fresh chapter in the story of the Jaguar marque.

But this latest example, to be unveiled at the Paris Motor Show next week, is the seventh generation and really is a milestone.

For more than three decades, the XJ has been the definitive Jaguar saloon and now, working with the most advanced technologies ever used by the company, the XJ programme team has created an even more robust car.

Its body of which is manufactured almost entirely from aluminium, providing new levels of strength, robustness and dynamic ability.

The bodyshell is some 40 per cent lighter than that of the equivalent steel body. Equally important, the new body is 60 per cent stiffer than its predecessor.

Featuring an industry-first use of rivet-bonded joining technology for the whole body structure, self-pierce rivets are used in combination with aerospace-sourced epoxy adhesive to join the aluminium pressings, castings and extrusions, providing great strength, robustness and durability.

There is increased space in every respect headroom, legroom and shoulder room are improved for all occupants.

The facia, seat and controls are distinctively new. Adjustable pedals are available to complement the electrically adjustable steering column and allow drivers to find exactly the seating position they need.

There is a new four-zone climate control system available, allowing separate adjustment of temperature settings by front and rear seat occupants. The new XJ will be available with a choice of four engines with two 4.2-litre V8 power plants setting the pace at the top of the range.

A 4.2-litre supercharged V8 delivering a massive 400 bhp powers the XJR model, while a naturally aspirated 4.2-litre engine developing 300bhp sits just below it.

Details of power output, performance, economy and emissions figures for all engines and models will be announced at a later date.

But there is more to the power-train story than the recognised strengths of Jaguar's 4.2-litre V8s. A new 3.5-litre V8 makes its debut here and again the trim nature of the new XJ allows the best possible exploitation of the highly impressive 262bhp.

Another engine new to the XJ also marks the return of a famous badge, as once again an XJ6 takes to the road.

The 240bhp 3.0-litre AJ-V6 engine offers a new level of accessibility with the performance expected of a luxury flagship.

This is made possible by the advanced body and chassis design, which keeps vehicle weight to a minimum.

Sales start next Spring and specification and prices will be announced just prior to that.