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.
EA381 family: 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
- 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.
Frequently asked questions about the Audi 1T
How much power does the Audi 1T make?
The Audi 1T develops 120 hp and 265 Nm of torque.
How much oil does the Audi 1T take and which one?
Engine oil capacity: 5.2 liters. Recommended oil: 5W-40.
Does the Audi 1T have a timing belt or chain?
The Audi 1T uses a timing belt.
Is the Audi 1T turbocharged?
Yes, the Audi 1T is turbocharged.
Does the Audi 1T need valve clearance adjustment?
No, the Audi 1T has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi 1T last?
The typical lifespan of the Audi 1T is ~500 000 km with proper maintenance.
What is the fuel consumption of the Audi 1T?
Audi 100 1990: city 8.8, highway 6.3, combined 7.2 L/100 km.
What cars was the Audi 1T installed on?
Audi 100 C3 (44) in 1990 - 1991.
What are the common problems of the Audi 1T?
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. All known problems.
