The XJS had a distinctive design, characterized by its long hood, low roofline, and sloping rear. It departed from the E-Type’s sleek and sporty appearance, featuring a more angular design. The XJS was initially offered with a 5.3-liter V12 engine. Later in its production, it also became available with inline-six engines and a V8 engine. The V12 engine was a significant feature, providing the XJS with ample power and a smooth, refined driving experience.

The XJS was known for its well-appointed and comfortable interiors, featuring high-quality materials and advanced amenities. It was designed as a grand tourer, emphasizing a balance between performance and luxury. Throughout its production, the XJS underwent several modifications and facelifts. In 1991, a major facelift occurred, updating the exterior with a smoother, more modern look. This version is often referred to as the XJS facelift or XJS (facelift) model.

While the XJS received mixed reviews during its early years, it gained more appreciation over time, especially as a luxurious and comfortable grand tourer. Today, the XJS is considered a classic, and well-maintained examples are sought after by collectors and enthusiasts. Its longevity in production and the improvements made over the years contribute to its historical significance within the Jaguar lineup.