1987-1991 Jaguar XJSc Convertible 3.6 (185 Hp)

The Jaguar XJSC Convertible 3.6, produced between 1987 and 1991, represents a significant iteration of Jaguar’s long-running XJ-S grand tourer. This open-top variant aimed to capitalize on the growing demand for luxury convertibles, offering a blend of British elegance, performance, and open-air driving pleasure. The XJSC, internally designated as Project Landaulet during development, was initially delayed due to structural concerns regarding rigidity, ultimately debuting in 1988. The 3.6-liter engine version occupied a middle ground in the XJSC lineup, positioned above the earlier 3.0-liter models and below the more potent 5.3-liter V12 versions. It was intended to provide a balance of performance and affordability within the XJSC range, appealing to buyers who desired a spirited driving experience without the higher price tag and complexity of the V12.

Technical Specifications

Powertrain & Engine Architecture

The heart of the XJSC 3.6 is Jaguar’s AJ6 inline-six engine, displacing 3.6 liters (3590 cc). This engine, a development of the earlier AJ series, featured a lightweight alloy cylinder head and block, contributing to its relatively compact size and weight. The 3.6-liter version utilized Bosch Motronic fuel injection and electronic ignition, improving efficiency and responsiveness compared to earlier carbureted Jaguar engines. The engine produced 185 horsepower at 5,500 rpm and 230 lb-ft of torque at 3,800 rpm. The valvetrain employed a double overhead camshaft design with four valves per cylinder, enhancing breathing and power output.

The XJSC 3.6 was exclusively offered with a three-speed automatic transmission, a Chrysler TorqueFlite A727 unit. While reliable, this transmission was sometimes criticized for its relatively conservative gear ratios, which prioritized smooth cruising over outright acceleration. The automatic transmission was chosen to appeal to the target market of luxury grand tourer buyers who preferred ease of use over manual shifting. The rear axle featured a limited-slip differential, improving traction and handling during spirited driving.

Driving Characteristics

The XJSC 3.6 offered a refined and comfortable driving experience, typical of Jaguar grand tourers. The 3.6-liter engine provided ample power for relaxed highway cruising and confident overtaking maneuvers. However, compared to the 5.3-liter V12 models, the 3.6 felt noticeably less powerful, particularly at higher speeds. Acceleration from 0 to 60 mph took approximately 8.5 seconds, while top speed was around 135 mph. The three-speed automatic transmission, while smooth, could feel somewhat sluggish during quick acceleration, as it lacked the closer gear ratios of a modern automatic. The XJSC’s suspension, featuring independent double wishbones all around, provided a comfortable ride, absorbing bumps and imperfections in the road surface effectively. The steering was power-assisted, offering a light and precise feel, although some drivers found it lacked feedback.

Equipment & Trim Levels

The XJSC Convertible 3.6 was well-equipped for its time, offering a range of luxury features as standard. These included leather upholstery, power windows, power steering, central locking, and an AM/FM stereo with cassette player. The interior trim was typically finished in wood veneer, adding to the car’s luxurious ambiance. Optional extras included a premium sound system, heated seats, a sunroof, and a self-leveling suspension system. The convertible top was a manually operated soft top, available in a range of colors. The dashboard layout was classic Jaguar, featuring a wood-trimmed instrument panel with analog gauges for speed, tachometer, fuel level, and coolant temperature.

Chassis & Braking

The XJSC Convertible utilized a monocoque chassis, reinforced to compensate for the loss of structural rigidity associated with removing the fixed roof. The chassis was designed to provide a balance of strength and lightness, contributing to the car’s handling characteristics. The front suspension featured independent double wishbones with coil springs and anti-roll bar, while the rear suspension also employed independent double wishbones with coil springs. Braking was provided by four-wheel disc brakes, with power assistance. The front brakes were vented, providing improved cooling and stopping power. Anti-lock braking system (ABS) was available as an option, enhancing safety and control during emergency braking situations.

Market Reception & Comparison

The XJSC 3.6 was generally well-received by automotive critics, who praised its elegant styling, comfortable ride, and refined interior. However, some critics noted that the 3.6-liter engine lacked the performance of the V12 models, and the three-speed automatic transmission felt dated compared to more modern transmissions. Compared to the XJSC 5.3 V12, the 3.6 offered a more affordable entry point into the XJSC range, but at the expense of outright performance. The 3.6 also offered better fuel economy than the V12, averaging around 17 mpg in city driving and 23 mpg on the highway. Compared to other luxury convertibles of the era, such as the Mercedes-Benz SL and the BMW 3 Series Convertible, the XJSC 3.6 offered a unique blend of British style and grand touring comfort.

Legacy

The Jaguar XJSC Convertible 3.6 remains a desirable classic car today, appreciated for its elegant styling and refined driving experience. The AJ6 engine is generally considered to be reliable, although regular maintenance is essential to prevent issues. The Chrysler TorqueFlite automatic transmission is also known for its durability, but may require occasional servicing. The XJSC’s convertible top can be prone to wear and tear, and may require replacement over time. In the used car market, the XJSC 3.6 typically commands a lower price than the V12 models, making it a more accessible option for enthusiasts. The XJSC Convertible 3.6 represents a significant chapter in Jaguar’s history, embodying the brand’s commitment to luxury, performance, and style. It continues to be a popular choice among collectors and enthusiasts who appreciate the charm and elegance of classic British motoring.