Engine Alfa Romeo AR67301

The 2.5-liter V6 Alfa Romeo AR67301 engine was assembled at the Arese plant from 1992 to 1997 and was installed only on charged modifications of the very popular 155 model in the European market. The same power unit was installed on the 166 sedan, but under its own index AR66201.

The Busso V6 series includes: AR34102, AR32405, AR67301, AR16105.


Production years 1992-1997
Displacement, cc 2492
Fuel system distributed injection
Power output, hp 165
Torque output, Nm 216
Cylinder block aluminum V6
Block head aluminum 12v
Cylinder bore, mm 88
Piston stroke, mm 68.3
Compression ratio 10.0
Features no
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 10W-40
Engine oil capacity, liter 6.0
Fuel type petrol
Euro standards EURO 2
Fuel consumption, L/100 km (for Alfa Romeo 155 1995)
— city
— highway
— combined
Engine lifespan, km ~240 000
Weight, kg 180

The engine was installed on:

  • Alfa Romeo 155 (Type 167) in 1992 – 1997.

Disadvantages of the Alfa Romeo AR67301 engine

  • On the engines of the first years, the cams of the exhaust camshaft wore out rather quickly.
  • Another weak point of this power unit is the valve guides.
  • Also on specialized forums, the unreliable hydraulic timing belt tensioner is often scolded.
  • A lot of trouble here is caused by constant leaks, and especially on cylinder head gaskets.
  • The remaining problems are related to air leaks in the intake and engine overheating.

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