🏷️ Basic Information

Make:

Audi

Model:

80

Model Variant:

80 Avant

Model Year:

1991

Chassis Codes:

8C, 8C2 (Sedan), 8C5 (Avant)

Market Segment:

Compact Executive / Small Family Car

👋 Introduction

Positioning:

The Audi 80 (B3/B4) was positioned as a premium compact executive car, competing with models like the BMW 3 Series and Mercedes-Benz 190E. It offered a blend of comfort, build quality, and driving dynamics.

Competitors:

BMW E30 (3 Series), Mercedes-Benz W201 (190E), Volvo 240, Saab 900, Ford Sierra.

Design Philosophy:

The B3/B4 generation Audi 80 emphasized aerodynamic design, robust construction, and a comfortable, well-appointed interior, reflecting Audi's 'Vorsprung durch Technik' slogan.

Body Styles:

Available as a 4-door sedan (8C2) and a 5-door station wagon (8C5 Avant).

📋 Manual Details

Overall Coverage:

Comprehensive service and repair for all models and variants of the Audi 80 (B3/B4 generation) for the 1991 model year.

Total Pages:

5552

Type:

Factory Service & Repair Manual

Language:

English

Digital Format:

PDF

Delivery Method:

Instant Download

Printable:

Yes

Text Searchability:

Fully searchable

Operating Systems:

Windows and Mac

Software Requirements:

Adobe PDF Reader and/or WinRar

📖 Manual Coverage

Engine:

Mechanical Engine (all variants including 4-cylinder and V6)

Transmission:

Manual and Automatic Transmissions

Driveline Axle:

Front-wheel drive (FWD) and Quattro all-wheel drive (AWD) systems

Brakes:

Hydraulic brake systems, ABS (Anti-lock Braking System)

Suspension:

Front and Rear Suspension Systems, components, and geometry

Steering:

Power Steering System, steering rack, linkages

Electrical:

Full Electrical System, including starter, alternator, battery, ignition, and charging systems

Lights:

Headlights, taillights, interior lighting, electrical circuits for lighting

Restraints:

Seat belts, airbag systems (if equipped)

Body Frame:

Body & Frame - Interior & Exterior, structural components, trim, panels

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) systems

Accessories Equipment:

Accessories & Equipment (e.g., power windows, mirrors, central locking)

Audio Visual Telematics:

Audio, Visual & Telematics systems (e.g., radio, speakers)

Tires Wheels:

Tire and Wheel specifications, mounting, and balancing

Maintenance:

Routine maintenance, scheduled servicing, inspections

Troubleshooting:

Diagnostic procedures, fault finding for all major systems

Repair:

Step-by-step repair instructions for all components and systems

Overhaul:

Engine and transmission overhaul procedures

Installation:

Component installation and replacement procedures

Specifications:

Torque specifications, clearances, adjustments, fluid capacities

Wiring Diagrams:

Detailed electrical wiring diagrams for all circuits and components

Depth:

Full Factory Service Manual, covering diagnostics, repair, overhaul, and specifications for all major vehicle systems.

📊 Manual Specifications

File Type:

PDF

Print Quality:

High-resolution, suitable for printing individual pages or the entire manual.

Binding Method:

Digital (Printable at User's discretion, no physical binding)

Paper Type Recommendation:

Standard printing paper (e.g., 20 lb bond) for general use, heavier stock recommended for frequently referenced pages.

⚙️ Engine Specifications

Engine Options:

Likely includes 1.6L, 1.8L, 2.0L 4-cylinder engines (e.g., 82hp, 90hp, 101hp, 115hp) and 2.3L 5-cylinder engines (e.g., 133hp), depending on specific market and trim.

Horsepower Range:

Approximately 82 hp to 133 hp (depending on engine variant).

Torque Range:

Varies by engine; e.g., 1.8L engines typically produced around 145 Nm.

Fuel Delivery:

Fuel injection (Bosch Motronic or similar) for most variants.

Common Codes:

Examples: PM (1.8L 90hp), RP (1.8L 90hp), ABK (2.0L 115hp), AAR (2.3L 5-cylinder 133hp).

🔧 Transmission

Manual Transmission:

Standard on most models, typically 5-speed manual.

Automatic Transmission:

Optional 4-speed automatic transmission available on many variants.

Quattro AWD:

The Quattro all-wheel-drive system was available on select engine variants, particularly the 2.3E and higher performance models.

📐 Dimensions

Wheelbase:

Approx. 2610 mm (102.8 in)

Length:

Sedan: Approx. 4405 mm (173.4 in); Avant: Approx. 4450 mm (175.2 in)

Width:

Approx. 1700 mm (66.9 in)

Height:

Approx. 1390 mm (54.7 in) for sedan, higher for Avant

Curb Weight:

Approx. 1150 kg to 1350 kg depending on engine and body style.

Gross Vehicle Weight Rating:

Varies by model, typically around 1600-1800 kg.

Luggage Capacity Sedan:

Approx. 470 liters (16.6 cu ft)

Luggage Capacity Avant:

Approx. 450 liters (15.9 cu ft) with rear seats up, expandable to over 1000 liters with seats folded.

🛡️ Safety Features

Crash Test Results:

While official Euro NCAP ratings are not available for this specific early 1991 model, its construction was considered robust for its era, with a reputation for safety.

ABS:

Anti-lock Braking System (ABS) was often an option or standard on higher trims.

Traction Control:

Traction control was generally not available on this generation.

Airbags:

Driver's side airbag became increasingly common through the early 90s, potentially optional or standard depending on the specific 1991 model year configuration. Passenger airbag not typically available.

Seatbelts:

Standard three-point seatbelts, with pre-tensioners becoming more common.

Body Structure:

Quattro chassis design contributed to structural rigidity.

💡 Technology Features

Audio System:

Factory radio/cassette players, often with optional CD changers. Manual covers installation and removal.

Cruise Control:

Available as an option on many variants.

Wiring Harness Details:

Extensive detail on all wiring harnesses, crucial for diagnosing electrical faults and installing aftermarket components.

🔧 Maintenance

Oil Change:

Typically every 10,000 km (6,000 miles) or 12 months, whichever comes first. Consult manual for specific engine variations.

Timing Belt Replacement:

Critical for interference engines. Typically every 60,000 km (36,000 miles) or 4 years. Manual will specify exact interval and procedure.

Spark Plug Replacement:

Varies by spark plug type (e.g., copper, platinum). Check manual for specific recommendations, often around 30,000-60,000 km.

Engine Oil Type:

API SG or SH, ACEA A1 or A2. Viscosity typically 5W-40, 10W-40, or 10W-50 depending on climate and engine. Check manual for exact specifications.

Coolant Type:

G11 (Blue) ethylene glycol-based antifreeze. Ensure proper 50/50 mix with distilled water.

Brake Fluid Type:

DOT 4.

Transmission Fluid Manual:

GL-4 gear oil, typically SAE 75W-90 or 80W-90. Check manual for specific gearbox.

Transmission Fluid Automatic:

ATF (Automatic Transmission Fluid) - consult manual for specific Audi specification (e.g., G009 300).

Electrical Gremlins:

Older Audis can develop electrical issues due to aged wiring harnesses, corroded connectors, and failing relays. The manual will provide extensive troubleshooting guides.

Cooling System:

Potential for radiator leaks, thermostat issues, and coolant hoses degrading over time. Regular inspection recommended.

Suspension Wear:

Ball joints, control arm bushings, and shock absorbers can wear out, leading to noise and handling issues. The manual details replacement procedures.

Fuel Pump Reliability:

In-tank fuel pumps can degrade with age, leading to starting issues or poor performance.

Door Lock Actuators:

Central locking actuators can fail over time, a common issue addressed in the electrical section.

📚 Vehicle History

Audi Legacy:

Audi, originating from Germany, has a long history dating back to the early 20th century, known for its engineering prowess, particularly with quattro all-wheel drive technology and premium interiors.

Generation:

The 1991 Audi 80 belongs to the B3 (Typ 89) generation, which evolved into the B4 generation starting around 1991/1992. The B4 introduced updated styling, improved safety, and a wider track. This manual likely covers the transition period or early B4 specifications.

Production Period:

The B3 generation was produced from 1986 to 1991, and the B4 from 1991 to 1996. The 1991 model year represents the overlap or introduction of the B4 platform.

Manufacturing Locations:

Primarily Germany.

🏆 Awards & Recognition

General Reputation:

The Audi 80 was generally well-regarded for its build quality, refinement, and durable engineering, contributing to Audi's growing reputation in the automotive market.

Iso Certification Context:

While specific model awards aren't detailed, Audi's commitment to quality management systems (like ISO certifications) influenced the manufacturing of vehicles like the Audi 80.