The 2.5-liter Audi 1T 2.5 TDI diesel engine was produced by the concern from 1989 to 1991 and was installed only on a restyled version of the popular model with an index of 100 in the C3 body. This engine was the first representative of a very famous line of 5-cylinder diesel engines.
The EA381 series also includes: CN, AAS, AAT, 1T, AEL, AHD, BJK.
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
- This engine is known for its high reliability and all its problems from old age;
- The main difficulties for the owner are the adjustment of the electronic injection pump VE37;
- Aluminum cylinder head does not like overheating, monitor the condition of the cooling system;
- Every 100,000 km, it is advisable to change the timing belt, since when it breaks, the valves bend;
- On long runs, the turbine, mass air flow sensor and hydraulic lifters often require attention.
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