Engine Audi 1T

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, BJM.


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
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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