Produced by the company between 1989 and 1991, the 2.5-liter Audi 1T 2.5 TDI diesel engine was limited to a redesigned version of the well-liked model with an index of 100 in the C3 body. This engine was the first in a well-known line of diesel engines with five cylinders.
The EA381 series also includes: CN, AAS, AAT, 1T, AEL, AHD, BJK, BJM.
Specifications
| Production years | 1989-1991 |
| Displacement, cc | 2460 |
| Fuel system | direct injection |
| Power output, hp | 120 |
| Torque output, Nm | 265 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 10v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 20.5 |
| Features | SOHC, intercooler |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | yes |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.2 |
| Fuel type | diesel |
| Euro standards | EURO 1 |
| Fuel consumption, L/100 km (for Audi 100 1990) — city — highway — combined |
8.8 6.3 7.2 |
| Engine lifespan, km | ~500 000 |
The engine was installed on:
- Audi 100 C3 (44) in 1990 – 1991.
Disadvantages of the Audi 1T engine
Despite all of its issues as it ages, this engine is renowned for its high dependability;
The electronic injection pump VE37 adjustment is the owner’s biggest challenge.
Because aluminum cylinder heads dislike overheating, keep an eye on the cooling system’s condition;
The timing belt should be changed every 100,000 kilometers because when it breaks, the valves bend; on long runs, the turbine, mass air flow sensor, and hydraulic lifters frequently need maintenance.