The 2.0-liter 5-cylinder Audi CN diesel engine was produced from 1978 to 1988 and was installed in the second and third generations of the rather popular Audi 100 model. This diesel engine had a supercharged DE modification, as well as an NC version with a turbine and intercooler.
The EA381 series also includes: CN, AAS, AAT, 1T, AEL, AHD, BJK, BJM.
Specifications
| Production years | 1978-1988 |
| Displacement, cc | 1986 |
| Fuel system | prechambers |
| Power output, hp | 69 |
| Torque output, Nm | 123 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 10v |
| Cylinder bore, mm | 76.5 |
| Piston stroke, mm | 86.4 |
| Compression ratio | 23.0 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.0 |
| Fuel type | diesel |
| Euro standards | EURO 1 |
| Fuel consumption, L/100 km (for Audi 100 1983) — city — highway — combined |
9.3 5.2 7.0 |
| Engine lifespan, km | ~300 000 |
The engine was installed on:
- Audi 100 C2 (43) in 1978 – 1982;
- Audi 100 C3 (44) in 1982 – 1988.
Disadvantages of the Audi CN engine
- This is a simple and reliable atmospheric diesel engine and all its problems from old age.
- The most common problem is high pressure fuel pump leaks due to wear of its gaskets.
- Monitor the condition of the timing belt, as with its breakage, the valves always bend.
- At high mileage, these engines often experience lubricant consumption.
- With regular overheating, the cylinder head may crack and it is not easy to find another.
