Engine Audi ADR

The 1.8-liter Audi 1.8 ADR gasoline engine was produced by the concern from 1994 to 2000 and was installed on the most popular models of the company A4, A6 or the fifth generation Passat. This power unit, in fact, did not differ much from its half-brother under the ARG index.

The EA827 1.8l series includes: RP, AAM, ABS, ADZ, PF, ADR, ARG, AEB, ANB.


Production years 1994-2000
Displacement, cc 1781
Fuel system injector
Power output, hp 125
Torque output, Nm 168
Cylinder block cast iron R4
Block head aluminum 20v
Cylinder bore, mm 81
Piston stroke, mm 86.4
Compression ratio 10.3
Features DOHC
Hydraulic lifters yes
Timing drive chain & belt
Phase regulator yes
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 4.5
Fuel type petrol
Euro standards EURO 3
Fuel consumption, L/100 km (for Audi A4 1996)
— city
— highway
— combined
Engine lifespan, km ~330 000

The engine was installed on:

  • Audi A4 B5 (8D) in 1994 – 1998;
  • Audi A6 C4 (4A) in 1995 – 1997;
  • Volkswagen Passat B5 (3B) in 1996 – 2000.

Disadvantages of the Audi ADR engine

  • The most problems are caused by the chain tensioner, which is also the phase regulator.
  • Also monitor the condition of the timing belt, because when it breaks, the valves always bend.
  • The crankcase ventilation is often clogged, and the oil separator gasket tans in frost.
  • The cause of engine thrust failures is usually a dirty throttle or intake flaps.
  • The viscous coupling of the fan, the pump and the flow meter have a low resource here.

2 thoughts on “Engine Audi ADR”

  1. My ADR engine starts ok but as I diver for a short distance, the vehicle looses all power and stops.. what could be the problem… I have replaced the head gasket..

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