Back to Audi
Official AutoWiki Guide

Audi Audi 100 (C2)

Find Me One
```html

Audi 100 (C2): A Comprehensive Guide

The Audi 100 C2, produced from 1976 to 1982 (1983 in some markets), was a significant step forward for Audi, solidifying its position as a competitor to Mercedes-Benz and BMW in the executive car segment. Building upon the success of the original Audi 100 C1, the C2 offered a more refined driving experience, improved fuel efficiency, and a wider range of engine options. It's considered a mid-size luxury car and was known for its comfortable ride and sophisticated styling, especially compared to some of its contemporaries.

Generations

  • Audi 100 C2 (1976-1982/83): The sole generation.
    • Key Changes:
    • Introduction of the five-cylinder petrol engine (Audi's first).
    • Improved aerodynamics compared to the C1.
    • Refined interior and exterior styling.
    • Availability of automatic and manual transmissions.
    • Significant changes in 1980 involving refreshed styling and technical updates.

Reliability & Common Issues

The Audi 100 C2, while generally well-built for its time, is now a classic car, and potential buyers should be aware of its age-related issues. Maintaining one today requires knowledge and dedication.

Engine

The Audi 100 C2 was available with a range of petrol engines, including four-cylinder and five-cylinder options. The five-cylinder engine is a hallmark of the model and a desirable feature for many enthusiasts.

  • Four-Cylinder Engines: These are generally robust, but check for oil leaks, especially around the valve cover and crankshaft seals. Overheating can be a problem if the cooling system is not properly maintained. Watch for signs of worn piston rings, such as excessive oil consumption and blue exhaust smoke.
  • Five-Cylinder Engines: The five-cylinder engine is known for its distinctive sound and smooth power delivery. However, it can be more complex to maintain than the four-cylinder. Common issues include:
    • Fuel Injection Problems: The early Bosch K-Jetronic fuel injection system can be sensitive and require specialist knowledge for diagnosis and repair. Check for rough idling, poor performance, and difficulty starting.
    • Timing Belt: Regular timing belt replacement is crucial to prevent catastrophic engine damage. Check the service history and replace the belt if there's any doubt.
    • Cooling System: Ensure the cooling system is in good order, as overheating can cause head gasket failure. Inspect the radiator, hoses, and water pump for leaks and corrosion.

Transmission

The Audi 100 C2 was available with both manual and automatic transmissions.

  • Manual Transmissions: Generally reliable, but check for worn synchromesh, especially in the lower gears. Difficulty shifting and grinding noises are signs of potential problems.
  • Automatic Transmissions: These can be prone to wear and tear over time. Check for smooth shifting and listen for unusual noises. Fluid leaks are also a common issue. Ensure the transmission fluid has been regularly changed.

Suspension & Brakes

  • Suspension: The suspension can suffer from worn bushings and ball joints, leading to vague handling and knocking noises. Check for excessive play in the steering and suspension components.
  • Brakes: Inspect the brake lines, calipers, and rotors for corrosion and leaks. Ensure the brakes are functioning properly and that the brake fluid has been regularly changed.

Body & Interior

  • Rust: Rust is a major concern, especially in areas prone to moisture, such as the wheel arches, sills, and floor pan. Thoroughly inspect the car for any signs of rust before purchasing.
  • Interior: The interior trim can be fragile and prone to damage. Check for cracks in the dashboard, tears in the upholstery, and broken switches.

Electrical System

Electrical problems can be common in older cars. Check the functionality of all electrical components, including the lights, wipers, and radio. Wiring can become brittle and corroded over time.

Driving Experience

The Audi 100 C2 offers a comfortable and refined driving experience, especially for its age. The ride is generally smooth, and the handling is competent, if not sporty. The five-cylinder engine provides ample power for most situations and delivers a distinctive sound. However, potential buyers should be aware that the car's age may affect its performance and handling compared to modern vehicles.

Pros:

  • Comfortable ride.
  • Smooth and distinctive five-cylinder engine (if equipped).
  • Relatively spacious interior.
  • Classic styling.

Cons:

  • Age-related reliability issues.
  • Potentially expensive maintenance and repairs.
  • Not as fuel-efficient as modern cars.
  • Handling not as sharp as modern vehicles.
  • Rust can be a significant problem.

Buying Advice

Purchasing an Audi 100 C2 can be a rewarding experience for classic car enthusiasts. However, it's essential to do your homework and carefully inspect any potential purchase.

What Years to Look For:

  • Later Models (1980-1982/83): These models often feature improvements and refinements compared to the earlier versions. The styling update in 1980 is also considered desirable by many.
  • Cars with Detailed Service History: A well-documented service history is crucial to ensure the car has been properly maintained. Look for evidence of regular maintenance, including timing belt replacements, fluid changes, and brake servicing.

What to Avoid:

  • Cars with Significant Rust: Rust repair can be expensive and time-consuming. Avoid cars with extensive rust damage, especially in critical areas such as the chassis and sills.
  • Cars with Neglected Maintenance: Cars that have been neglected or poorly maintained are likely to require significant repairs. Avoid cars with obvious signs of neglect, such as leaks, worn tires, and damaged interior trim.
  • Cars with Extensive Modifications: While some modifications may be acceptable, avoid cars that have been heavily modified, as these can be more difficult to maintain and may have compromised reliability.

Pre-Purchase Inspection:

Before purchasing an Audi 100 C2, it's highly recommended to have it inspected by a qualified mechanic who is familiar with classic cars. This inspection should include a thorough assessment of the engine, transmission, suspension, brakes, and electrical system. The mechanic should also check for signs of rust and previous damage.

Parts Availability:

Parts for the Audi 100 C2 can be challenging to find, but many specialist suppliers cater to classic Audi models. Research parts availability and pricing before purchasing the car.

By following these guidelines, you can increase your chances of finding a well-maintained Audi 100 C2 that will provide years of enjoyment.

```