Engine Audi ALF

The 2.4-liter Audi ALF 2.4 V6 engine was produced at the concern’s factories from 1997 to 2000 and was installed on the company’s most popular models of its time: A4 B5, and also A6 C5. This power unit has many analogues under other indices: AGA, APS, AML and ARJ.

The EA835 series includes: ABC, AAH, ALF, BDV, ARE, ACK, ALG, BBJ, ASN.


Production years 1997-2000
Displacement, cc 2393
Fuel system injector
Power output, hp 165
Torque output, Nm 230
Cylinder block cast iron V6
Block head aluminum 30v
Cylinder bore, mm 81
Piston stroke, mm 77.4
Compression ratio 10.5
Features 2 x DOHC
Hydraulic lifters yes
Timing drive chains & belt
Phase regulator hydraulic chain tensioner
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 6.0
Fuel type petrol
Euro standards EURO 3
Fuel consumption, L/100 km (for Audi A6 1998)
— city
— highway
— combined
Engine lifespan, km ~330 000

The engine was installed on:

  • Audi A4 B5 (8D) in 1997 – 2000;
  • Audi A6 C5 (4B) in 1997 – 2000.

Disadvantages of the Audi ALF engine

  • These engines are quite reliable, the main problems for owners are leaks.
  • If the power unit is allowed to overheat, oil and antifreeze leaks will increase significantly.
  • Due to poor lubrication, hydraulic lifters and chain tensioners quickly fail.
  • At high mileage, the electrician starts to fail regularly: sensors, coils, lambdas.
  • Throttle or idle valve contamination is the main cause of floating engine speeds.

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