Jaguar engineers adopted the proven construction techniques of the aerospace industry to assemble the aluminum monocoque bodies of the F-Type, XJ and XK models. When joining aluminum pressings, rivet bonding uses self-piercing rivets and epoxy adhesives for strength, robustness and durability.

The body of the XJ is stiffer by 60% and lighter by 40% compared to its previous steel model. The XK is 31% stiffer and also 40% lighter. Being lighter than the equivalent steel bodies, the XJ, XK and F-Type (no equivalent steel body) structures carry significantly less kinetic energy into a collision, reducing the amount of energy that has to be absorbed by the bodies in an accident.

Front and rear crush zones in the body structure progressively absorb crash energy while protecting the integrity of the cabin, and the "tube-in-tube" propshaft features built-in crush properties to absorb collision energy.