Market Position:
The Audi 90 (Type 89/8B) was positioned as Audi's premium compact executive sedan and coupe, competing with other European and Japanese luxury marques in its segment during the late 1980s and early 1990s.
Key Competitors:
BMW 3 Series (E30/E36), Mercedes-Benz 190E (W201), Volvo 240/740, Acura Legend, Infiniti M30.
Distinctive Features:
Renowned for its distinctive inline 5-cylinder engine offering a unique sound and strong mid-range torque, Quattro all-wheel drive (optional), upscale interior, and solid build quality.
Value For Buyers:
Provides essential, detailed information for maintenance, troubleshooting, and repair, enabling owners to maintain their classic Audi 90 effectively and cost-efficiently.
Engine Types Covered:
2.3L 5-cylinder (NG, NF, AAR engines)
Transmission Types Covered:
5-speed manual, 4-speed automatic (013, 016 manual; 097, 098 automatic)
Drivetrain Types Covered:
Front-wheel drive (FWD), Quattro all-wheel drive (AWD)
Estimated Page Count:
Varies by specific manual edition; typically 1000+ pages for comprehensive factory service manuals.
Manual Type:
Workshop Service Repair Manual
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip (for extraction)
Operating System Compatibility:
All Versions of Windows & Mac
Engine Management:
Engine mechanical (including disassembly/assembly), ignition system, fuel system, emissions control, engine control unit (ECU) diagnostics and testing.
Drivetrain:
Clutch, transmission (manual and automatic), differential, drive shafts, Quattro system components.
Suspension And Steering:
Front and rear suspension, steering rack, power steering system, wheel alignment specifications.
Brakes:
Front and rear brake systems (disc brakes), parking brake, anti-lock braking system (ABS) components and diagnostics (if equipped).
Electrical System:
Battery, charging system, starting system, lighting, wipers, horns, power windows, central locking, instrument cluster, wiring diagrams.
Body And Chassis:
Body panels, doors, interior trim, glass, heating, ventilation, and air conditioning (HVAC) system, structural components.
Maintenance Procedures:
Scheduled maintenance (oil changes, filter replacements, tune-ups), fluid level checks, lubrication, belt inspections/replacement.
Diagnostic Procedures:
Troubleshooting guides, fault code interpretation, component testing procedures, wiring diagram usage.
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair across all major vehicle systems.
Overhaul Procedures:
Complete engine, transmission, and differential overhaul procedures.
Special Tools:
Identification and usage of specialized Audi tools required for specific repairs.
Technical Depth:
Comprehensive, from basic maintenance and troubleshooting to complete engine and transmission rebuilds. Suitable for both DIY enthusiasts and professional mechanics.
Engine Code And Type:
2.3L (2309cc) Inline 5-cylinder, SOHC 10v (90 hp) or DOHC 20v (130 hp in 20v engines, though less common in 90 model, more in 100/200/V8 variants); common codes: NG (10v), NF (10v), AAR (10v).
Horsepower Range:
Approximately 130-136 hp for the 10v engines.
Torque Range:
Approximately 140-145 lb-ft for the 10v engines.
Fuel Injection System:
Bosch KE-Jetronic (CIS-E) or Motronic electronic fuel injection.
Coolant Type:
G11 specification coolant (typically blue or green ethylene glycol-based).
Ignition System Type:
Distributorless ignition system (DIS) or distributor with electronic ignition control.
Standard Transmission:
5-speed manual transmission (013 for FWD, 016 for Quattro)
Optional Transmission:
4-speed automatic transmission (097, 098)
Quattro System:
Viscous coupling center differential and rear Torsen differential (on some later models) for the Quattro AWD system.
Manual Transmission Fluid:
API GL-4 or GL-5, SAE 75W-90 synthetic gear oil is commonly recommended. Refer to manual for exact specification (e.g., G 052 171 A1).
Automatic Transmission Fluid:
G 052 162 A1 (or equivalent ATF Dexron III/Mercon specification). Capacity approx. 3.5 liters.
Crash Test Ratings:
Data from this era is limited by modern standards. Primarily relied on passive safety features like seatbelts and crumple zones.
Active Safety Features:
Optional Anti-lock Braking System (ABS).
Passive Safety Features:
Three-point seatbelts (front and rear), padded interior, reinforced body structure.
Infotainment System:
Basic analog AM/FM/Cassette stereo system, often with optional CD player. Manual climate control (heater, ventilation, optional A/C).
Driver Assistance Features:
Optional ABS, power steering, cruise control (on some models).
Connectivity Options:
No modern connectivity features (Bluetooth, USB, etc.); aftermarket head units are common for upgrades.
Oil Change Interval:
Every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions. Consult manual for precise recommendations.
Timing Belt Replacement:
Every 40,000-60,000 miles (64,000-96,000 km) for the 5-cylinder engine. Crucial maintenance item due to potential for severe engine damage if it breaks.
Spark Plug Replacement:
Typically every 30,000 miles (48,000 km), depending on plug type (standard or platinum).
Engine Oil Specification:
API SG or SH, SAE 5W-40 or 10W-40 synthetic or semi-synthetic oil is recommended. Oil capacity: approx. 4.5 liters (4.75 US quarts).
Coolant Capacity:
Approx. 7.0 liters (7.4 US quarts).
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid.
Common Wear Items:
Fuel distributor diaphragm (CIS-E), coolant hoses, vacuum lines, ignition components (rotor, cap, wires), CV joints, wheel bearings, and suspension bushings.
Electrical Issues:
Corrosion in electrical connectors, failure of headlight relays, issues with door lock actuators and window regulators.
Engine Issues:
Oil leaks from valve cover gasket and crank seals, idle control valve issues, exhaust manifold cracks on some early 5-cylinder engines.
Audi Brand Positioning:
Audi established itself as a premium German manufacturer known for its engineering, quattro all-wheel drive technology, and understated luxury.
Audi 90 Lineage:
The Audi 90 (Type 89/8B) was an evolution of the Audi 80/90 (Type 81/85), introducing a more aerodynamic design, improved interior, and the highly regarded 5-cylinder engine.
Production Period:
1984-1991 (for the Type 89/8B generation, with the 90 designation specifically for the higher-spec models).
Manufacturing Locations:
Primarily manufactured in Ingolstadt, Germany.
Industry Recognition:
While specific awards for the 1988-1992 Audi 90 are not as prominently documented as modern vehicles, the generation was recognized for its engineering, design, and the introduction of advanced technologies like quattro AWD.
Consumer Reports Ratings:
Contemporary reviews often praised its ride quality, performance (especially Quattro models), and interior refinement, though some noted maintenance costs and potential reliability concerns compared to Japanese rivals.
