Jaguar XJ by Jaguar MENA — CC BY 2.0 If you’re looking for the epitome of British luxury automobiles, look to the Jaguar XJ. For over 50 years, it stood as Jaguar’s flagship luxury sedan, with updates to keep it with or ahead of the pack for decades. This lead to the final model in 2019 being the most refined expression of style and performance the British Isles ever sent stateside.