Engine Audi AEL

The 2.5-liter Audi AEL 2.5 TDI diesel engine was produced by the company from 1994 to 1997 and was installed on only one, but very popular model: the A6 in the C4 body. This 5-cylinder diesel engine was distinguished from its counterparts in the series by a more powerful turbine and nozzles.

The EA381 series also includes: CN, AAS, AAT, 1T, AEL, AHD, BJK, BJM.


Production years 1994-1997
Displacement, cc 2460
Fuel system direct injection
Power output, hp 140
Torque output, Nm 290
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 2
Fuel consumption, L/100 km (for Audi A6 1996)
— city
— highway
— combined
Engine lifespan, km ~450 000
Weight, kg 210

The engine was installed on:

  • Audi A6 C4 (4A) in 1994 – 1997.

Disadvantages of the Audi AEL engine

  • This diesel engine is considered reliable and most of its problems are due to old age;
  • Most owners are concerned about the problems associated with the Bosch VE37 electronic injection pump;
  • Once every 100,000 km, an expensive replacement of the timing belt awaits you, and when it breaks, the valves bend;
  • The cylinder head is afraid of overheating, carefully monitor the cooling system;
  • After 200,000 km, attention is often required: turbine, mass air flow sensor and hydraulic lifters.

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