Positioning:
Premium Luxury Sedan
Competitors:
BMW 7 Series, Mercedes-Benz S-Class, Audi V8 Quattro, Cadillac DeVille
Design Philosophy:
Elegant styling, sophisticated engineering, emphasis on comfort and refinement
Value Proposition:
Cost-effective alternative to other European luxury brands, high level of craftsmanship
Engine:
Yes, including inline-six variants
Transmission:
Yes, automatic and manual (if applicable)
Fuel System:
Yes, including fuel injection
Brakes:
Yes, including ABS
Suspension:
Yes, including self-leveling (if equipped)
Steering:
Yes, including power steering
Electrical System:
Yes, comprehensive wiring schematics
Climate Control:
Yes, including HVAC
Bodywork:
Yes, exterior and interior
Body Controls:
Yes, power windows, locks, etc.
Routine Maintenance:
Yes, oil changes, filter replacements, fluid checks
Scheduled Maintenance:
Yes, interval-based servicing
Diagnostic Troubleshooting:
Yes, extensive fault finding guides
Component Repair Overhaul:
Yes, detailed step-by-step procedures for major overhauls
Electrical Component Replacement:
Yes, including specific diagnostics for ECUs and sensors
Brake System Maintenance Repair:
Yes, including ABS bleed procedures
Suspension Component Replacement:
Yes, including ride height adjustments
Fuel Injector Cleaning Replacement:
Yes
Engine Timing Adjustment:
Yes
Transmission Fluid Change Overhaul:
Yes
Body Panel Alignment Repair:
Yes
Wiring Harness Repair:
Yes
Depth:
Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts
Diagnostic Capabilities:
Advanced, with detailed symptom-to-cause charts and electrical troubleshooting
Rebuild Procedures:
Complete, covering major mechanical components
Torque Specifications:
Included for all critical fasteners
Clearances Tolerances:
Provided for engine and transmission components
Searchability:
Likely searchable if OCR'd, though not explicitly stated
Print Recommendation:
High-quality printing recommended for clarity of schematics and diagrams
Binding Recommendation:
Loose-leaf or spiral-bound for workshop use
Paper Recommendation:
Durable paper for frequent handling
Engine Type:
3.6L (3590cc) DOHC Inline-6 (AJ6)
Bore X Stroke:
94.0 mm x 86.7 mm
Horsepower:
Approximately 220-225 hp @ 5100-5300 rpm
Torque:
Approximately 230-235 lb-ft @ 3300-3500 rpm
Fuel Delivery:
Bosch L-Jetronic Fuel Injection
Required Octane:
Premium Unleaded (91 Octane Recommended)
ECU:
Jaguar Electronic Control Unit (ECU)
Type:
ZF 4HP22 EH 4-Speed Automatic Transmission
Type:
Rarely, manual transmissions (e.g., Getrag) might have been available in certain markets, but automatic was predominant.
Electronic Control:
EH (Electronic Hydraulic) control for improved shift quality and performance
Transmission Fluid:
Dexron-III / Mercon Automatic Transmission Fluid
Length:
Approx. 4985 mm (196.3 in)
Width:
Approx. 1795 mm (70.7 in)
Height:
Approx. 1385 mm (54.5 in)
Wheelbase:
Approx. 2870 mm (113.0 in)
Curb Weight:
Approx. 1700-1800 kg (3750-3970 lbs)
Gross Weight Rating:
Typically around 2300 kg (5070 lbs)
Crash Test Data:
Limited standardized testing data available for this era compared to modern standards. Focus on Jaguar's internal safety engineering.
ABS:
Yes, Anti-lock Braking System (Bosch ABS)
Airbags:
Driver-side airbag standard for 1990 model year.
Seatbelts:
Front and rear seatbelts, likely with pre-tensioners for front occupants.
Body Structure:
Designed with crumple zones and a reinforced passenger cell, typical of Jaguar's safety focus.
Audio System:
Premium Jaguar-branded cassette stereo system with optional CD player.
Controls:
Dash-mounted controls, steering wheel audio controls may be present on some models.
Cruise Control:
Standard feature
Trip Computer:
May be present on higher trim levels.
Original Connectivity:
Limited to factory-installed radio and power accessories.
Oil Change Interval:
Typically every 3,000-6,000 miles or 6-12 months, depending on driving conditions (refer to manual for specifics).
Major Service Interval:
Spark plug replacement, coolant flush, transmission fluid change recommended at higher mileages (e.g., 30,000-60,000 miles).
Engine Oil:
API SG/SH, SAE 10W-30 or 10W-40 (check manual for specific viscosity recommendations based on climate).
Coolant:
Ethylene Glycol based antifreeze, mixed 50/50 with distilled water. Jaguar specifies specific coolant types, consult manual.
Brake Fluid:
DOT 3 or DOT 4 Hydraulic Brake Fluid.
Power Steering Fluid:
Jaguar specified fluid or equivalent (e.g., Dexron-III in some cases, verify with manual).
Common Problems:
Electrical gremlins (Lucas electrics), head gasket leaks, oil cooler hose failures, sun roof drains clogging, suspension bush wear.
Oil Filter:
Example: Fram PH2/PH16, Mann W940/30, Purflux LS746 (verify with manual).
Air Filter:
Example: Fram CA3071, Mann C36100 (verify with manual).
Heritage:
Jaguar has a long-standing reputation for luxury, performance, and elegant automotive design dating back to the 1930s.
Model Lineage:
The XJ6 is the flagship sedan of Jaguar, evolving through several generations of luxury and refinement.
Production Era:
The XJ40 generation (which includes the 1990 model) was produced from 1986 to 1994.
Manufacturing Location:
Coventry, England
