The 2.4-liter 5-cylinder Audi AAS diesel engine was produced from 1991 to 1994 and was installed only on the fourth generation of the popular Audi 100 model. This unit is an updated version of the 3D diesel engine known from the C3 model.
The EA381 series also includes: CN, AAS, AAT, 1T, AEL, AHD, BJK, BJM.
Specifications
| Production years | 1991-1994 |
| Displacement, cc | 2370 |
| Fuel system | prechambers |
| Power output, hp | 82 |
| Torque output, Nm | 164 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 10v |
| Cylinder bore, mm | 79.5 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 23.0 |
| Features | SOHC |
| Hydraulic lifters | yes |
| 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 1993) — city — highway — combined |
9.9 5.5 7.5 |
| Engine lifespan, km | ~380 000 |
The engine was installed on:
- Audi 100 C4 (4A) in 1991 – 1994.
Disadvantages of the Audi AAS engine
- This is a very reliable and durable diesel engine without a turbine and with a mechanical injection pump;
- The only weak point of the motor is the cylinder head prone to cracking;
- You also need to monitor the condition of the timing belt, since when it breaks, the valves bend;
- After 200,000 km, lubricant consumption is common, up to a liter per 1000 km;
- Even on long runs, the high-pressure fuel pump often leaks here due to the wear of its gaskets.
