Produced between 1991 and 1994, the 2.4-liter, five-cylinder Audi AAS diesel engine was limited to the fourth generation of the well-liked Audi 100 model. This device is an upgraded 3D diesel engine, similar to 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 diesel engine has a mechanical injection pump and no turbine, making it incredibly dependable and long-lasting;
The motor’s cylinder head, which is prone to cracking, is its only weak point.
Additionally, since the valves bend when the timing belt breaks, you must keep an eye on its condition;
Lubricant consumption is typical after 200,000 kilometers, reaching a liter per 1000 kilometers;
Due to gasket wear, the high-pressure fuel pump frequently leaks here even during extended runs.