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Dreame X40 Ultra vs iRobot Roomba Plus 405 Combo
The Dreame X40 Ultra wins with a score of 8.4/10. Best for: Mid-to-large hard-floor homes wanting flagship mopping at a discount.
Winner
Dreame X40 Ultra
8.4/10$900
Last-gen flagship with class-leading mopping, now half its launch price.
Read full reviewiRobot Roomba Plus 405 Combo
7.4/10$400
A solid mid-tier Roomba that finally brings LiDAR navigation and a self-washing dock under $500. But weak deep-carpet performance and zero obstacle avoidance make it hard to recommend over the Roborock Q Revo or Dreame L40 Ultra at the same price.
Read full reviewScore Comparison
Dreame X40 UltraiRobot Roomba Plus 405 Combo
Overall
8.47.4
Hard Floor
9.28.4
Carpet
8.56.5
Mopping
9.47.5
Navigation
8.68.0
Noise
7.57.5
Smart Features
8.37.0
Maintenance
7.88.5
Specifications
| Dreame X40 Ultra | Spec | iRobot Roomba Plus 405 Combo |
|---|---|---|
| $900 | Price | $400 |
| 12000 | Suction (Pa) | — |
| 6400 | Battery (mAh) | 5000 |
| 65.0 | Noise (dB) | 65.0 |
| — | Dustbin (ml) | — |
| — | Water Tank (ml) | — |
| — | Mop Lift (mm) | — |
| — | Height (mm) | — |
| — | Weight (kg) | — |
| LiDAR + 3D Structured Light | Navigation | LiDAR |
| ✅ | Self-Empty | ✅ |
| ✅ | Self-Wash Mop | ✅ |
| ✅ | Self-Dry Mop | ✅ |
| ✅ | AI Obstacle | ❌ |
The Verdict
The Dreame X40 Ultra is the better choice with an overall score of 8.4/10 — best for mid-to-large hard-floor homes wanting flagship mopping at a discount. The iRobot Roomba Plus 405 Combo is more affordable at $400 vs $900.