https://www.caranddriver.com/reviews/comparison-test/a15140702/2000-bmw-m5-vs-2000-mercedes-benz-e55-amg-2000-jaguar-xjr-comparison-test/ "Although the Jaguar, at 197.8 inches long, is about 10 inches longer than its rivals, it isn't roomier, making this dimensional variation functionally irrelevant. All three cars are also lavishly equipped with the most sybaritic conveniences, ranging from a power sunshade in the backlight of the Mercedes to the standard navigation system in the M5 to the umbrella that comes with every XJR. All three cars are even priced on top of one another, with their 70-or-so-grand base prices varying by no more than $3072."
"Jaguar XJ12". Motor Sport. June 1973. pp. 42–45. Retrieved 29 March 2018.
motortrend.com
https://www.motortrend.com/reviews/1995-jaguar-xjr/ "Although reputedly capable of carrying five humans, this is no M-B S-Class (or even a BMW 5-Series) in terms of interior volume. The wide front console and expansive instrument panel encroach somewhat on front-passenger living room, while the downright-tight confines of the rear compartment will make full-car riders scrunch up extra close."