Simpson PowerShot 4000 PSI vs Westinghouse WPX3800

Last updated: October 31, 2026

The Westinghouse WPX3800 is the better pressure washer overall, rated 4.0 to 3.9. The Westinghouse WPX3800 leads on value. The Westinghouse WPX3800 costs $92.31 less ($737.63 vs $829.94).

Simpson PowerShot 4000 PSI vs Westinghouse WPX3800

Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every gas pressure washer; a clear win is highlighted. How we rank explains each one.

Factor weightWestinghouse WPX3800Simpson PowerShot 4000 PSI
Overall rating4.0/53.9/5
Value 35%54 $53.92 per 1,000 cleaning units ($737.63, 13,680)44 $59.28 per 1,000 cleaning units ($829.94, 14,000)
Cleaning power 30%100 13,680 cleaning units (3,800 PSI x 3.6 GPM)100 14,000 cleaning units (4,000 PSI x 3.5 GPM)
Hose 10%100 35 ft hose100 50 ft hose
Warranty 25%50 3-year warranty50 3-year warranty

Specifications

Westinghouse WPX3800Simpson PowerShot 4000 PSI
Cleaning
Pressure3,800 PSI4,000 PSI
Flow3.6 GPM3.5 GPM
Cleaning units13,68014,000
Nozzles included55
DetergentOnboard tank-
Power
PowerGasGas
Engine or motor274 cc (Westinghouse OHV)270 cc (Honda GX270)
PumpTriplex plungerTriplex plunger
CARB compliantNoNo
Build
Hose35 ft50 ft
Weight91 lb120 lb
Warranty3 years3 years

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