IR & Doosan P185 vs P250: When Is It Time to Size Up?
The IR (Ingersoll Rand) and Doosan P185 is one of the most common tow-behind compressors on the jobsite. But what happens when 185 CFM is no longer enough?
That’s when contractors start looking at the P250 class.
What Does the “185” and “250” Mean?
The number in the model name refers to airflow capacity in CFM (Cubic Feet per Minute).
- P185 ≈ 185 CFM
- P250 ≈ 250 CFM
CFM determines how much total air volume the compressor can deliver.
When a P185 Is the Right Choice
The P185 is well suited for:
- Single heavy jackhammer applications
- Mid-size sandblasting setups
- General construction use
- Mobile service trucks
It remains one of the most versatile and widely used portable compressors.
Signs You May Need More Than 185 CFM
- Running multiple high-demand tools at once
- Larger blasting nozzle requirements
- Frequent pressure drops under load
- Continuous full-load operation
If your P185 is constantly operating at maximum output, you may be at capacity.
What a P250 Provides
Stepping up to a P250 class machine increases available airflow.
This allows:
- Larger blasting setups
- Multiple heavy tools simultaneously
- Reduced strain when running near capacity
More airflow equals more headroom.
Does PSI Change When You Size Up?
Pressure ratings vary by configuration. CFM increase does not automatically mean higher PSI.
Always confirm both airflow and pressure ratings for your specific model.
Ownership Considerations
Moving from a P185 to a P250 may involve:
- Higher fuel consumption
- Larger footprint
- Different maintenance components
However, for contractors outgrowing 185 CFM, the added capacity can prevent tool bottlenecks and downtime.
Is the P185 Still the Most Popular Size?
Yes. The P185 remains the most common tow-behind compressor class due to its balance of mobility and performance.
For many contractors, it is the ideal middle ground.
FAQ
Is 185 CFM enough for sandblasting?
It depends on nozzle size and total air demand.
Will upgrading to a P250 increase jobsite productivity?
If your current compressor frequently runs at full capacity, additional airflow can improve consistency.
Are maintenance parts the same between P185 and P250?
No. Always confirm model and serial number before assuming compatibility.
Before upgrading from a P185
Evaluate your total CFM demand and confirm your current unit’s rated output to determine if sizing up makes sense.