2010 Jaguar XJ Long (X351) Dimensions, Size & Specs

The curb weight of the Jaguar XJ Long (X351) varies between 1707 kg to 1961 kg (3763 to 4324 lbs) depending on the specific model and trim levels, which is reflective of its robust build quality and extensive luxury features. The maximum permissible weight ranges from 2320 kg to 2450 kg (5113 to 5401 lbs), which accounts for the vehicle's gross vehicle weight including passengers, cargo, and fuel. This weight range highlights the XJ Long’s substantial size and its ability to safely carry multiple occupants and luggage with stability and comfort.

The Jaguar XJ Long (X351) offers a generous luggage capacity of 520 liters (approximately 18.4 cubic feet), which is very competitive within its luxury sedan segment. This ample boot space allows for multiple suitcases or large items, catering well to both families and executives who require space for luggage on extended journeys. Compared to other luxury sedans, this capacity is quite spacious, striking a good balance between the car's sporty styling and practical usability.

For the Jaguar XJ Long (X351), a range of rim sizes are available, including 8.0J x 18, 9.0J x 19, 9.0J x 20, and 10J x 19 or 20 inches, allowing customization based on performance preferences or aesthetic choices. The tire sizes that complement these rims include 275/45 R18, 275/40 R19, 275/35 R20, 245/50 R18, 245/45 R19, and 245/40 R20. This variety facilitates both comfort-oriented and sporty driving setups, enhancing the vehicle's adaptability on varying road conditions.

The Jaguar XJ Long (X351) measures about 5247-5252 mm (206.5-206.7 inches) in length and approximately 1894-1899 mm (74.5-74.7 inches) in width, which is quite large relative to average passenger cars. Standard garages commonly measure around 2400 to 2700 mm (94.5 to 106 inches) in width and approximately 5000 to 6000 mm (197 to 236 inches) in length. Given these figures, the Jaguar XJ Long can fit into most standard garages in terms of length but may be somewhat tight in width, especially considering mirror width when open (2105 mm / 82.9 inches). In practical terms, the car will fit in most single-car garages, but drivers should be cautious when maneuvering and parking, particularly in narrower spaces.

Compared to its predecessor (the X350 generation), the Jaguar XJ Long (X351) introduced in 2010 is generally slightly longer and wider, reflecting a modern luxury sedan trend toward larger passenger compartments and more imposing road presence. The X351’s length at about 5247-5252 mm (206.5–206.7 inches) is longer than the previous generation's approximate 5160 mm (203.1 inches). Width increased similarly to provide a broader stance and enhanced interior space, moving from around 1870 mm (73.6 inches) to nearly 1899 mm (74.7 inches). These changes enhance passenger comfort, especially for rear passengers given the “Long” wheelbase, while incorporating a sleeker, more aerodynamic design with updated styling elements. The X351 also weighs more due to added technology and luxury features, reflecting its evolution toward refined performance and comfort.

In the full-size luxury sedan segment, the Jaguar XJ Long (X351) sits comfortably among competitors such as the BMW 7 Series, Mercedes-Benz S-Class, and Audi A8. Measuring approximately 5.25 meters (206.5 inches) in length, it is generally in the upper mid to long range for this class, comparable to or slightly longer than some rivals. Its width around 1.9 meters (74.7 inches) with mirrors folded is typical for cars in this category, although opening the mirrors extends the width significantly, a factor shared with many premium sedans. The Jaguar XJ Long thus offers a spacious cabin akin to its German rivals, with a distinctive British styling and dynamic driving focus. Its luggage capacity of 520 liters also competes well, sitting between the commonly reported 500-540 liters in this category, making it a practical choice for luxury buyers seeking roominess and style.

The Jaguar XJ Long (X351) stands at approximately 1457 mm (57.4 inches) in height, which is relatively low compared to some other luxury sedans. This low height contributes to a sleek, sporty profile that benefits aerodynamics, reducing drag and helping fuel efficiency at higher speeds. The aerodynamic design enhances driving dynamics and stability. On the other hand, the lower stance might make entry and exit slightly less effortless than taller luxury sedans or SUVs, particularly for passengers with limited mobility, but it remains manageable for most users due to well-thought-out seat heights and door design.

Including the side mirrors, the Jaguar XJ Long (X351) measures approximately 1950 mm (76.8 inches) in width with mirrors folded and extends to about 2105 mm (82.9 inches) with mirrors open. This significant increase in width when mirrors are deployed is an essential consideration for parking in tight spaces or driving along narrow roads. Drivers need to be mindful of the extended width to avoid scrapes or collisions with obstacles or other vehicles. The folding mirrors function is therefore a practical feature to reduce width to a more manageable level when parking or driving through constrained areas, while the open mirror width supports better side visibility during normal driving.

While specific fuel efficiency varies depending on the engine and drivetrain choice, the Jaguar XJ Long (X351) tends to have moderate fuel economy typical of large luxury sedans, balancing performance and refinement. With curb weights ranging from 1707 kg to 1961 kg (3763 to 4324 lbs), the car's powertrain options—including V6 and V8 engines paired with advanced transmissions—deliver smooth acceleration and dynamic driving characteristics. The weight influences fuel consumption but also contributes to a stable and comfortable ride quality. Drivers experience strong performance, especially in higher trims, with the vehicle designed more for luxury and grand touring comfort than ultra-economy. Fuel efficiency is generally competitive for its class but should be considered alongside its size and power output.