The JAGUAR XJ (2010-15) 4DR SALOON LWB 5.0 V8 SS 510 EU5 SUPERSPORT AUTO8 is a long-wheelbase luxury saloon, a British flagship rather than a family hatchback or SUV. In the UK used market, it competes with premium executive cars, standing out through generous rear space and dramatic, elegant styling. With its powerful V8 and smooth automatic gearbox, the Supersport is built for effortless, rapid long-distance travel, while the extended cabin makes rear passengers comfortable. It suits buyers seeking an imposing, special-occasion car or a motorway companion, rather than someone prioritising low running costs, easy city parking or budget motoring. mycarcheck.com records 29 checks across 18 VINs, a snapshot rather than a huge sample. Those checks show average mileage of 60,000 miles, 5,000 miles annually, and about 1.7 previous keepers; the average private-sale valuation is £19,800. Its blend of comfort, pace and rarity sets it apart from German rivals.