Jaguar's prototype car was powered a prototype quad cam V12 that never saw the light of day. True to the original concept, the Tempero car utilises the production version of Jaguar's V12, in it's most efficient 5.3 liter HE fuel injected version. Fully independent suspension is featured all round , while the braking system utilises Jaguar's triple pot callipers with ventilated disks at front and twin pot callipers at the rear.
The fit and finish of the all-aluminium Tempero XJ13 body is impeccable, as is expected by buyers of a craftsmen built car of this calibre. The faultless paintwork is complemented by the leather trimmed interior, all of which is individually made in the customer's choice of colours.

The beast has by no means been tamed but rather has been developed to reflect modern standards of performance, safety, quality and finish.

Only a very limited number of Tempero XJ13s are built each year. Ownership of one of these exclusive vehicles shows a rare distinction in a world of plastics and mass production.