LEATHER SEATS, CONVERTIBLE The Jaguar XJ-S (later called XJS) is a luxury grand tourer manufactured and marketed by British automobile manufacturer Jaguar. You could expect to pay $17,050 – 21,890 based on third party pricing data (per Carsguide). It received the new High-Efficiency V12 engine for much better fuel economy. This engine produces a maximum power of 277 PS. The XJS Convertible has Independent. Double Wishbones. coil springs. anti-roll bar front suspension and Coil springs. anti-roll bar rear suspension.