Engine Audi JN

The 1.8-liter Audi JN engine was produced at a German plant from 1984 to 1991 and was installed on the Audi 80 in the B2 and B3 body, as well as on the second generation Volkswagen Passat. This power unit was distinguished by the presence of a KE-Jetronic distributed fuel injection system.

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


Production years 1984-1991
Displacement, cc 1781
Fuel system KE-Jetronic
Power output, hp 90
Torque output, Nm 137 – 145
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 81
Piston stroke, mm 86.4
Compression ratio 10.0
Features SOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 3.5
Fuel type petrol
Euro standards EURO 1
Fuel consumption, L/100 km (for Audi 80 1990)
— city
— highway
— combined
Engine lifespan, km ~350 000
Weight, kg 135

The engine was installed on:

  • Audi 80 B2 (81) in 1984 – 1986;
  • Audi 80 B3 (8A) in 1986 – 1991;
  • Volkswagen Passat B2 (32) in 1984 – 1988.

Disadvantages of the VW JN engine

  • Most of the problems of this unit are associated with malfunctions of the KE-Jetronic system.
  • The injection system cannot be called unreliable, just few people know how to set it up.
  • Hydraulic compensators here do not like low-quality oil and can simply start to freeze.
  • At high mileage, lubricant consumption occurs due to the occurrence of oil scraper rings.
  • Weak points also include ignition system components and temperature sensor.

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