Audi CN
This is a simple and reliable atmospheric diesel engine and all its problems from old age.
Audi 100 engines
The Audi 100 is a family of business-class passenger cars produced from 1968 to 1994 by the car manufacturer Audi AG. The cars were manufactured in the body of a sedan, station wagon, coupe, hatchback in front- and all-wheel drive modifications. The number 100 in the name of the model meant the engine power of the first generation car, which was the highest performance for a car of this line at that time. In total, four generations of the model were released. In 1990, a hybrid version of the model was released – the Audi Duo, and a year later – its second generation.
The Audi 100 was offered with 14 engines between 1978 and 1994 (4 diesel, 10 petrol). Displacement ranges from 2.0 to 2.8 liters, power output from 69 to 174 hp. 1 use a timing chain and 14 a timing belt. 2 are turbocharged. The longest rated lifespan belongs to the Audi AAT (about 550,000 km).
Audi 100 engines by generation
| Engine | Years | Volume | Power | Fuel | Timing | Oil | Lifespan |
|---|---|---|---|---|---|---|---|
| Audi 100 C2 (43) 1978–1982 | |||||||
| Audi CN | 1978–1982 | 2.0 L R5 | 69 hp | diesel | belt | 5 L | ~300,000 km |
| Audi 100 C3 (44) 1982–1991 | |||||||
| Audi CN | 1982–1988 | 2.0 L R5 | 69 hp | diesel | belt | 5 L | ~300,000 km |
| Audi KU | 1984–1990 | 2.2 L R5 | 138 hp | petrol | belt | 4.5 L | ~350,000 km |
| Audi NF | 1986–1990 | 2.3 L R5 | 136 hp | petrol | belt | 4.5 L | ~340,000 km |
| Audi RT | 1988–1990 | 2.0 L R5 | 115 hp | petrol | belt | 4.5 L | ~340,000 km |
| Audi 1T | 1990–1991 | 2.5 L R5 | 120 hp | diesel, turbo | belt | 5.2 L | ~500,000 km |
| Audi AAR | 1990–1991 | 2.3 L R5 | 133 hp | petrol | belt | 4.5 L | ~350,000 km |
| Audi 100 C4 (4A) 1990–1994 | |||||||
| Audi AAH | 1990–1994 | 2.8 L V6 | 174 hp | petrol | belt | 5 L | ~350,000 km |
| Audi AAR | 1990–1994 | 2.3 L R5 | 133 hp | petrol | belt | 4.5 L | ~350,000 km |
| Audi AAE | 1990–1994 | 2.0 L R4 | 101 hp | petrol | belt | 3 L | ~300,000 km |
| Audi AAD | 1990–1993 | 2.0 L R4 | 115 hp | petrol | belt | 3 L | ~320,000 km |
| Audi AAT | 1991–1994 | 2.5 L R5 | 115 hp | diesel, turbo | belt | 5.2 L | ~550,000 km |
| Audi AAS | 1991–1994 | 2.4 L R5 | 82 hp | diesel | belt | 5 L | ~380,000 km |
| Audi ABK | 1991–1994 | 2.0 L R4 | 115 hp | petrol | belt | 3 L | ~350,000 km |
| Audi ABC | 1992–1994 | 2.6 L V6 | 150 hp | petrol | belt | 5 L | ~400,000 km |
| Audi ACE | 1992–1994 | 2.0 L R4 | 140 hp | petrol | chain + belt | 3 L | ~360,000 km |
Audi 100 engine FAQ
What engines were used in the Audi 100?
Audi 100 C2 (43) (1978–1982): Audi CN; Audi 100 C3 (44) (1982–1991): Audi CN, Audi KU, Audi NF, Audi RT, Audi 1T and Audi AAR; Audi 100 C4 (4A) (1990–1994): Audi AAH, Audi AAR, Audi AAE, Audi AAD, Audi AAT, Audi AAS, Audi ABK, Audi ABC and Audi ACE.
Which Audi 100 engine is the most durable?
By rated service life the most durable Audi 100 engines are: Audi AAT — about 550,000 km; Audi 1T — about 500,000 km; Audi ABC — about 400,000 km. Actual lifespan depends heavily on maintenance and oil change intervals.
How much oil does the Audi 100 engine take?
Engine oil capacity with filter: Audi 1T — 5.2 L (5W-40); Audi AAD — 3 L (5W-30); Audi AAE — 3 L (5W-30); Audi AAH — 5 L (5W-30); Audi AAR — 4.5 L (5W-40); Audi AAS — 5 L (5W-40); Audi AAT — 5.2 L (5W-40); Audi ABC — 5 L (5W-30, 5W-40); Audi ABK — 3 L (5W-30); Audi ACE — 3 L (5W-30); Audi CN — 5 L (5W-40); Audi KU — 4.5 L (5W-40); Audi NF — 4.5 L (5W-40); Audi RT — 4.5 L (5W-40).
Does the Audi 100 have a timing belt or chain?
Timing chain: Audi ACE; timing belt: Audi 1T, Audi AAD, Audi AAE, Audi AAH, Audi AAR, Audi AAS, Audi AAT, Audi ABC, Audi ABK, Audi ACE, Audi CN, Audi KU, Audi NF and Audi RT. Belts must be replaced on schedule: on many engines a broken belt bends the valves.
Engine details
Audi KU
The main problems for the owner are delivered by the K-Jetronic mechanical injection system.
Audi NF
Most problems for owners are caused by malfunctions of the KE-III-Jetronic system.
Audi RT
All the main problems of this engine are related to the K / KE-Jetronic injection system.
Audi 1T
This engine is known for its high reliability and all its problems from old age.
Audi AAD
Most often, car owners with such an engine complain about the vagaries of KE-Motronic.
Audi AAE
The main problems for owners are caused by malfunctions in the Mono-Motronic system.
Audi AAH
The main complaints of car owners with such an engine are related to oil consumption.
Audi AAR
The main engine problems are related to the vagaries of the KE-III-Jetronic injection system.
Audi AAS
This is a very reliable and durable diesel engine without a turbine and with a mechanical injection pump.
Audi AAT
One of the most reliable diesel engines of its time rarely worries its owners.
Audi ABK
This motor is rightfully considered one of the most reliable in the class and rarely breaks down.
Audi ABC
Most of the complaints on specialized forums are related to progressive oil consumption. Consumption appears closer to 200,000 km after the wear…
Audi ACE
All the most common engine problems are related to the KE-Motronic system.