The 2.5-liter V6 Alfa Romeo AR32405 engine was produced in Arese from 2000 to 2005 and was installed only on advanced modifications of the 156 model popular in the European market. Another similar power unit was installed on the 166 sedan under its own index AR36201.
The Busso V6 series includes: AR34102, AR32405, AR67301, AR16105.
Specifications
| Production years | 2000-2005 |
| Displacement, cc | 2492 |
| Fuel system | distributed injection |
| Power output, hp | 192 |
| Torque output, Nm | 218 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 88 |
| Piston stroke, mm | 68.3 |
| Compression ratio | 10.3 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 10W-40 |
| Engine oil capacity, liter | 6.4 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Alfa Romeo 156 2002) — city — highway — combined |
17.0 8.8 11.8 |
| Engine lifespan, km | ~280 000 |
| Weight, kg | 190 |
The engine was installed on:
- Alfa Romeo 156 (Type 932) in 2000 – 2005.
Disadvantages of the Alfa Romeo AR32405 engine
- Most of the problems with this motor are due to suction through cracked pipes.
- This leads to floating engine speeds, as well as airing the system and overheating.
- Also often the engine overheats due to the failure of the thermostat or water pump.
- Saving on oil greatly affects the resource of hydraulic lifters and liners.
- The timing belt needs to be changed every 60,000 km, or if it breaks, the valves will bend.
