The 2005 Jaguar XJ was available in five trims; XJ8, XJ8 Long, Vanden Plas, Super V8 and XJR. Every model was equipped with a 4.2L V-8 engine. In both of the XJ8s and the Vanden Plas, the V-8 engine was naturally aspirated and produced 294 horsepower and 303 foot-pounds of torque. In the Super V8 and XJR, the V-8 was supercharged, making it good for 390 horsepower and 399 foot-pounds of torque.
The 2005 Jaguar XJR was the high-performance variant of the XJ family. Built on the shorter 119.4-inch wheelbase and equipped with the supercharged V-8, the XJR was meant for speed. The XJR could conquer a 0 to 60 mph run in five seconds, an impressive feat for a vehicle that weighed nearly 4,000 lbs. Accelerating from 0 to 100 mph could be accomplished in 12.1 seconds. Bringing the XJR from 60 to 0 mph could be done in 121 feet.
The Jaguar's powerful V-8 engines performed well at the gas pumps. The naturally aspirated 294 horsepower engines received an EPA estimated 18 mpg city and 28 mpg highway. The supercharged V-8 engines were estimated at 17 mpg city and 24 mpg highway.
While the Jaguar XJ stuck to its traditional styling, modern upgrades were applied to ensure top performance. Self-leveling suspension, front and rear stabilizer bars, double wishbone suspension and active suspension all guaranteed the XJ would stay flat and handle confidently. Equipped with 19-inch wheels wrapped in Z-rated tires promised the XJR could transfer power effectively from the rear wheels to the road.
When speaking about the performance of the 2005 Jaguar XJR, Gareth Wardell of the Auto Channel said that "being bang-up-to-date, this car can glide in city traffic, or fly on motorway journeys. 0 to 60 in 5 secs. I have to mention the satellite navigation system, one of the most logical, easiest to use I have ever encountered." During a XJ model review, Edmunds said that "an all-aluminum body and high-tech air suspension combined with classic Jaguar styling give the XJ a fighting chance against its German rivals."
In 1968, the first 9-1-1 emergency response telephone system went into service, Pink Floyd released "A Saucerful of Secrets," Nixon was elected U.S. president and Jaguar introduced the XJ to their model lineup. Very few things were the same in 2005 as they were in 1968, with the exception of the Jaguar XJ. Since inception, the styling of the XJ had essentially remained the same.