The Jaguar XJSc Convertible 5.3, produced between 1990 and 1994, represented the final iteration of the XJ-S (XJS) model line, offering open-air motoring with the potent V12 engine. Building upon the earlier XJ-S coupe and convertible models, the XJSc aimed to provide a luxurious and powerful grand touring experience. It was positioned as the flagship convertible in Jaguar’s lineup during this period, appealing to buyers seeking a sophisticated and high-performance vehicle. The XJSc was based on the XJ-S platform, internally designated as the Series III, and benefited from refinements made throughout the XJ-S’s production run. It was a relatively short-lived model, as the XJ-S was replaced by the Jaguar XJ8 in 1996.
Technical Specifications
| Brand | Jaguar |
| Model | XJS |
| Generation | XJSc Convertible |
| Type (Engine) | 5.3 (284 Hp) |
| Start of production | 1990 |
| End of production | 1994 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 20.6 l/100 km (11.4 US mpg, 13.7 UK mpg, 4.9 km/l) |
| Fuel consumption (extra urban) | 10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l) |
| Fuel consumption (combined) | 12.9 l/100 km (18.2 US mpg, 21.9 UK mpg, 7.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Weight-to-power ratio | 6.8 kg/Hp, 147.9 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 216.1 Nm/tonne |
| Power | 284 Hp @ 5500 rpm |
| Power per litre | 53.2 Hp/l |
| Torque | 415 Nm @ 2800 rpm (306.09 lb.-ft. @ 2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 5343 cm3 (326.05 cu. in.) |
| Number of cylinders | 12 |
| Engine configuration | V-engine |
| Cylinder Bore | 90 mm (3.54 in.) |
| Piston Stroke | 70 mm (2.76 in.) |
| Compression ratio | 11.5:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Kerb Weight | 1920 kg (4232.88 lbs.) |
| Max. weight | 2130 kg (4695.85 lbs.) |
| Max load | 210 kg (462.97 lbs.) |
| Trunk (boot) space – minimum | 407 l (14.37 cu. ft.) |
| Fuel tank capacity | 89 l (23.51 US gal | 19.58 UK gal) |
| Length | 4820 mm (189.76 in.) |
| Width | 1793 mm (70.59 in.) |
| Height | 1279 mm (50.35 in.) |
| Wheelbase | 2588 mm (101.89 in.) |
| Front track | 1489 mm (58.62 in.) |
| Rear (Back) track | 1504 mm (59.21 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system), Hydraulic Steering |
| Tires size | 230/65 ZR16 |
Powertrain & Engine Architecture
The heart of the XJSc Convertible 5.3 was Jaguar’s venerable 5.3-liter V12 engine. This engine, designated as the AJ6, was a naturally aspirated, all-aluminum alloy V12 featuring a 60-degree bank angle. It utilized a multi-port fuel injection system and dual overhead camshafts with two valves per cylinder. The engine produced 284 horsepower at 5500 rpm and 415 Nm (306 lb-ft) of torque at 2800 rpm. The engine’s smooth power delivery was a hallmark of the XJ-S, providing effortless acceleration. The XJSc was exclusively paired with a four-speed automatic transmission, a Borg-Warner unit known for its smoothness but not its outright speed. This transmission was calibrated for comfortable cruising rather than aggressive shifting. The engine was mounted longitudinally in the front of the vehicle, driving the rear wheels.
Driving Characteristics
The 1990-1994 XJSc Convertible 5.3 offered a grand touring experience characterized by smooth power delivery and a comfortable ride. While the 0-60 mph time of around 7.7 seconds wasn’t blistering by modern standards, the V12 engine provided ample power for effortless highway cruising and overtaking. The automatic transmission, while smooth, did contribute to a slight loss of responsiveness compared to the manual transmission options available on earlier XJ-S models. The gear ratios were optimized for relaxed cruising, rather than maximizing acceleration. The car’s weight, approximately 4,233 pounds, also played a role in its driving dynamics. The XJSc wasn’t a particularly nimble sports car, but it excelled at providing a refined and luxurious driving experience.
Equipment & Trim Levels
The XJSc Convertible 5.3 was well-equipped, reflecting its position as a luxury vehicle. Standard features included leather upholstery, power windows, power seats, air conditioning, and a premium sound system. The interior featured wood trim and a generally upscale ambiance. Optional extras included a heated windshield, a sunroof, and upgraded audio systems. The convertible top was a fully automatic, lined fabric top. Trim levels were relatively limited, with most variations stemming from optional equipment choices. The focus was on providing a high level of standard luxury rather than offering a wide range of customizable options.
Chassis & Braking
The XJSc Convertible utilized a double wishbone suspension system at both the front and rear, providing a comfortable and controlled ride. The suspension was tuned for grand touring, prioritizing ride quality over sharp handling. Braking duties were handled by ventilated disc brakes at the front and solid disc brakes at the rear. An anti-lock braking system (ABS) was standard, enhancing safety. Power steering was also standard, making the car relatively easy to maneuver. The chassis was reinforced to compensate for the loss of structural rigidity inherent in a convertible body style.
Market Reception & Comparison
The XJSc Convertible 5.3 was generally well-received by automotive critics, who praised its luxurious interior, smooth ride, and powerful engine. However, some critics noted the car’s relatively high price and its somewhat dated technology compared to newer competitors. Fuel economy was also a concern, with the V12 engine consuming a significant amount of gasoline. Compared to the XJ-S coupe, the convertible offered a more open-air driving experience but suffered from a slight reduction in structural rigidity. Compared to other luxury convertibles of the era, such as the Mercedes-Benz SL, the XJSc offered a unique blend of British style and V12 power.
Legacy
The Jaguar XJSc Convertible 5.3 remains a desirable classic car today, particularly among Jaguar enthusiasts. The V12 engine is known for its reliability when properly maintained, although it can be expensive to repair. The automatic transmission is generally durable, but like any older automatic, it may require occasional servicing. The convertible top mechanism can be prone to issues if not regularly maintained. The XJSc’s combination of luxury, performance, and British charm has ensured its continued appeal in the used car market. Values have been steadily increasing in recent years, reflecting the growing demand for classic Jaguars. It represents a final flourish for the XJ-S line, offering a unique and enjoyable driving experience.
