Positioning:
The Jaguar XJ40 represented Jaguar's foray into modern luxury sedan design, competing with established German and American luxury marques. It was positioned as a premium, technologically advanced vehicle for its era.
Competitors:
Mercedes-Benz W124 E-Class, BMW E32 7 Series, Audi V8 Quattro, Cadillac DeVille, Lincoln Continental.
Design:
Taut-line styling, aerodynamic profile, distinctive quad headlights (early models), integrated bumpers, spacious interior.
Technology:
Advanced electronics for its time, including early forms of ABS, trip computers, and sophisticated engine management systems.
Audience:
Affluent individuals seeking a comfortable, stylish, and refined luxury sedan with a focus on driving dynamics.
Model Years Covered:
1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
Estimated Page Count:
Very Large (up to 5 GB total file size)
Type:
Master Workshop Manual / Service Manual / Repair Manual
Format:
Digital Download (PDF, ZIP, RAR, or EXE)
Engine:
Detailed engine overhaul, diagnostics, tuning, lubrication systems, cooling systems, fuel systems (EFI), ignition systems, exhaust systems.
Transmission:
Automatic transmission service and repair, fluid changes, valve body diagnostics, torque converter procedures.
Drivetrain:
Rear-wheel drive system, differential service, driveshaft, axle maintenance.
Suspension:
Front and rear suspension systems, shock absorbers, springs, bushings, steering linkage, alignment specifications.
Brakes:
Hydraulic brake systems, ABS (Anti-lock Braking System) diagnostics and repair, brake pad/disc replacement, brake fluid specifications.
Electrical:
Comprehensive electrical diagrams, wiring harnesses, lighting systems, ignition, starting, charging systems, dashboard instrumentation, power accessories, control modules.
Bodywork:
Body panel repair, door mechanisms, window regulators, sunroof operation, exterior trim, interior trim removal and installation, climate control system.
HVAC:
Air conditioning system service, refrigerant charging, heater core, blower motor, climate control panel diagnostics.
Maintenance:
Regular scheduled maintenance, oil and filter changes, fluid level checks, belt inspections, tune-up procedures.
Troubleshooting:
Systematic diagnostic procedures for common and complex problems, fault code interpretation, symptom-based troubleshooting guides.
Repair:
Step-by-step repair instructions for all major components and systems, including engine rebuilds, transmission overhauls, brake system repairs, and electrical diagnostics.
Restoration:
Guidance for restoring components, bodywork, and interior elements to original specifications.
Diagnostics:
In-depth diagnostic procedures for engine management, electronic control units (ECUs), and various vehicle systems.
Depth:
Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed electrical schematics and diagnostic trees.
Compatibility:
Compatible with all operating systems (Windows, Linux, Mac) and viewable with any PDF reader.
Printability:
Printable on any computer and printer.
Binding:
Not Applicable (Digital Download)
Paper Quality:
Not Applicable (Digital Download)
Zoomable Illustrations:
Yes
Explosions Views:
Detailed component explosions and exploded views included.
Part Number Breakdowns:
Detailed part number breakdowns for all aspects.
Searchable:
Likely searchable depending on PDF creation, but not guaranteed.
Engine Codes:
AJ6 (3.6L, 4.0L), AJ16 (later models)
Engine Displacement:
3.6-liter (3590cc), 4.0-liter (3980cc)
Horsepower 3.6L:
Approx. 221 hp @ 5100 rpm
Torque 3.6L:
Approx. 275 lb-ft @ 3500 rpm
Horsepower 4.0L:
Approx. 245 hp @ 5250 rpm
Torque 4.0L:
Approx. 295 lb-ft @ 3750 rpm
Fuel Delivery:
Electronic Fuel Injection (EFI) - Lucas/Jaguar systems
Cylinder Block:
Aluminum Alloy
Cylinder Head:
Aluminum Alloy
Valvetrain:
Dual Overhead Camshafts (DOHC), 4 valves per cylinder
Length:
Approx. 199.9 inches (5077 mm)
Width:
Approx. 70.1 inches (1780 mm)
Height:
Approx. 53.9 inches (1370 mm)
Curb Weight:
Approx. 3900 - 4200 lbs (1769 - 1905 kg), depending on engine and specification.
Wheelbase:
Approx. 115.3 inches (2929 mm)
Crash Test Results:
No formal NHTSA/IIHS ratings available for this era in the same way as modern vehicles. Known for robust build quality.
ABS:
Anti-lock Braking System (ABS) available on most models, standard on later years.
Traction Control:
Traction control systems were introduced on later models.
Airbags:
Driver's side airbag standard on later models, passenger airbag not common.
Seatbelts:
3-point seatbelts with pretensioners.
Chassis Design:
Integrated safety cage, crumple zones.
Audio System:
Factory-installed AM/FM stereo with cassette player. Optional CD player on later models. Premium sound systems available.
Cruise Control:
Standard cruise control system.
Trip Computer:
Early trip computers providing fuel consumption, range, and other data.
Connectivity Features:
Limited by modern standards; primarily focused on internal vehicle systems rather than external connectivity.
Oil Change Interval:
Typically every 5,000 to 7,500 miles (8,000 to 12,000 km) or 6-12 months, depending on usage and oil type. Consult manual for specific recommendations.
Transmission Fluid Change:
Every 30,000 to 50,000 miles (48,000 to 80,000 km) for automatic transmissions. Check manual for exact interval and procedure.
Coolant Flush:
Every 30,000 miles (48,000 km) or 2 years.
Engine Oil Type 3.6L:
API SG or SH, SAE 10W-40 or 20W-50 (depending on climate). Consult manual for precise specification.
Engine Oil Type 4.0L:
API SG or SH, SAE 10W-30 or 10W-40 (depending on climate). Consult manual for precise specification.
Transmission Fluid Type:
Dexron III (or equivalent specification for ZF 4HP22)
Brake Fluid Type:
DOT 3 or DOT 4
Power Steering Fluid:
Jaguar specification or Dexron III
Head Gasket:
Early AJ6 engines could be prone to head gasket failure if not properly maintained or if overheated.
Electrical Gremlins:
The XJ40's complex electronics could be susceptible to issues, often related to wiring harnesses, grounds, and module failures.
Suspension Bushings:
Wear in suspension bushings and ball joints is common due to age and mileage, affecting ride and handling.
Rust:
Like many cars of this era, rust can be an issue, particularly in wheel arches, sills, and around windows.
Air Conditioning System:
Age-related degradation of seals and compressors can lead to AC system failures.
Heritage:
Jaguar has a long-standing reputation for producing luxurious, performance-oriented grand tourers and sedans, dating back to the SS Jaguar 100 and continuing through iconic models like the E-Type and XJ series.
Xjs Influence:
The XJ40 inherited many design and engineering cues from the XJ-S, particularly in its powertrain and chassis development.
Design Philosophy:
Represented a significant departure from the older XJ-S and XJ6 (Series III) body styles, aiming for a more modern, aerodynamic, and globally competitive design.
Production Period:
1986-1994
Manufacturing Plant:
Coventry, England (Browns Lane factory)
