Market Position:
The Audi S8 (D2) was positioned as a high-performance, luxury executive sedan, offering a blend of potent V8 power, sophisticated German engineering, and advanced technology for its era.
Competitive Analysis:
Competed directly with other flagship performance sedans such as the BMW 7 Series (e.g., 740i, 750i), Mercedes-Benz S-Class (e.g., S500), and Jaguar XJ. The S8 distinguished itself with its Quattro all-wheel-drive system and aggressive styling.
Key Features:
Standard 4.2L V8 engine, Quattro all-wheel drive, luxurious interior appointments, advanced safety features, spacious cabin, superior ride comfort combined with dynamic handling.
Performance Differentiation:
The S8 moniker signifies enhanced performance over the standard A8, with a more potent engine, sport-tuned suspension, and distinctive styling cues.
Systems Covered:
Engine, Transmission, Fuel System, Ignition System, Lubrication System, Exhaust System, Electrical System, Bodywork, Suspension, Steering, Brakes, HVAC, Infotainment.
Electrical System Coverage:
Extensive coverage of the vehicle's electrical system, including wiring diagrams, component locations, starter, alternator, battery service, lighting systems, and electronic control units (ECUs).
Brake System Coverage:
Detailed information on brake system components, including disc and pad replacement, caliper service, hydraulic system bleeding, ABS system diagnostics, and brake fluid specifications.
Suspension And Steering Coverage:
Procedures for suspension component replacement (control arms, ball joints, shock absorbers), steering rack service, power steering system maintenance, and wheel alignment specifications.
Fuel System Coverage:
Detailed procedures for fuel pump inspection and replacement, fuel injectors, fuel pressure regulator, and fuel tank service.
Ignition System Coverage:
Covers spark plug replacement, ignition coil diagnostics and replacement, and ignition control module information.
HVAC System Coverage:
Procedures for climate control system diagnostics, refrigerant handling, blower motor replacement, and heater core/evaporator service.
Procedures Included:
Routine maintenance and servicing, diagnostic procedures, repair procedures, component removal and installation, assembly and disassembly, engine and transmission overhaul, tune-ups.
Engine Repair Procedures:
Covers engine rebuilds, piston and connecting rod installation, cylinder head service, crankshaft and camshaft timing, and complete engine removal/installation.
Transmission Repair Procedures:
Detailed procedures for transmission overhaul, torque converter replacement, valve body service, and transmission control module diagnostics.
Bodywork Procedures:
Includes repair procedures for body panels, door mechanisms, bumpers, lighting, and interior trim components.
Technical Depth:
Detailed instructions for mechanical technicians, assuming familiarity with general automotive practices and emphasizing product-specific repair procedures. Includes specifications and procedures equivalent to authorized Audi dealer service departments.
Diagnostic Procedures:
Includes detailed diagnostic flowcharts, troubleshooting guides for common symptoms, and explanations of error codes related to various vehicle systems.
Special Tools:
The manual identifies recommended and required special tools, often with Audi part numbers, essential for precise adjustments and repairs.
Primary Engine:
4.2L V8 (Naturally Aspirated)
Horsepower Range:
Approximately 340-360 PS (250-265 kW; 335-355 hp) depending on the specific model year and configuration.
Torque Range:
Approximately 420-430 Nm (310-317 lb-ft).
Fuel System:
Multi-point fuel injection (MPI).
Engine Codes:
Common engine codes include ACK, AHK, AKH, and AQH for the 32-valve 4.2L V8.
Engine Configuration:
4.2L DOHC V8, 32 valves.
Bore Stroke:
Approx. 84.5 mm x 93.0 mm
Compression Ratio:
Approximately 10.8:1.
Safety Ratings:
Specific crash test ratings from this era (e.g., NHTSA, Euro NCAP) may vary, but the D2 platform was engineered with a strong emphasis on occupant protection.
Active Safety Features:
Anti-lock Braking System (ABS), Electronic Stability Program (ESP - later versions), Quattro all-wheel drive.
Passive Safety Features:
Dual front airbags, front side airbags, available rear side airbags, reinforced body structure, safety-belt pretensioners.
Infotainment Features:
Standard features often included a premium sound system (e.g., Bose), navigation system (optional/early iterations), and a multi-function display in the instrument cluster. CD player integration was common.
Driver Assistance Features:
Key driver assistance systems included advanced Traction Control (ASR) and Electronic Stability Program (ESP), integrated with the Quattro all-wheel-drive system for enhanced stability and traction.
Connectivity Features:
Early versions of Bluetooth hands-free calling might have been available as an option on later models, integrated into the infotainment system. OnStar was not typically a feature in European market Audis of this era.
Service Intervals:
Refer to the manual for specific intervals, but generally includes oil changes every 7,500-10,000 miles (12,000-16,000 km) or annually, spark plug replacement around 60,000-100,000 miles (100,000-160,000 km), timing belt/chain inspection and replacement as per Audi's recommendations (critical for V8 engines).
Engine Oil Specification:
API SJ or higher, ACEA A3/B3, viscosity typically 5W-40 or 0W-40, depending on climate and specific Audi recommendation. Refer to the manual for exact specifications.
Coolant Specification:
G12 or G12+ coolant (pink or purple).
Transmission Fluid Specification:
G 055 025 or equivalent for the automatic transmission. Fluid and filter changes are crucial for longevity.
Known Issues:
Early D2 S8 models can experience electrical gremlins, catalytic converter failure, ABS/ESP sensor issues, oxygen sensor failures, suspension component wear (especially control arms), and potential coil-on-plug issues. The timing belt system (if applicable for specific sub-variants, though many D2 S8s have timing chains) requires diligent maintenance.
Parts Information:
The manual provides instructions on parts applicable to the Audi S8 1997-2003, including proprietary components, which aids in sourcing correct replacement parts.
Engine Oil Capacity:
Approx. 7.0-7.5 liters (7.4-7.9 US quarts).
Coolant Capacity:
Approx. 10.0-11.0 liters (10.6-11.6 US quarts).
Transmission Fluid Capacity:
Approx. 4.0-5.0 liters (4.2-5.3 US quarts) for a fluid change.
Oil Filter Part Numbers:
Refer to the manual for specific part numbers, but commonly available from Mann-Filter, Mahle, Bosch (e.g., Mann-Filter W715/2, W719/5).
Tire Sizes:
Commonly equipped with 245/45 ZR18 or 245/40 ZR19 tires.
Wheel Bolt Pattern:
5x112
Wheel Offset:
Typically in the range of ET35-ET45.
Brand Heritage:
Audi, a German automobile manufacturer, has a long history dating back to 1910, known for its engineering innovation, Quattro all-wheel drive technology, and luxury vehicles.
Model Evolution:
The S8 designation represents Audi's highest performance variant of the A8 luxury sedan. The D2 generation S8 (1997-2003) followed the groundbreaking D1 generation and introduced the potent 4.2L V8 with Quattro to a wider audience, establishing the S8 as a serious contender in the performance luxury segment.
Production Period:
1996-2002 (for the D2 generation S8).
Manufacturing Locations:
Primarily manufactured in Ingolstadt, Germany.
