Notes: Specs are manufacturer-stated unless otherwise noted; performance claims cross-checked with lab/field reviews.
vs
3315sq. ft. (66 points)
vs
300ml (39 points)
vs
75days (50 points)
vs
58dB (22 points)
vs
12000Pa (55 points)
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Data for the chart is sourced from public sources.
| Metric | Dreame X40 Ultra | Dreame L40 Ultra |
|---|---|---|
| Edge reach (cm) |
1.2
High
ⓘ
Sources [1] Official specs [3] Vacuum Wars tests [6] Owner photos Aggregated (weighted median). [1][3][6] |
1.3
Med
ⓘ
Sources [2] Official specs [4] RTINGS lab Aggregated (weighted median). [2][4] |
| Threshold climb (mm) |
22
Med
ⓘ
Sources [1] Official specs [5] Video tests Median of consistent passes (≥2/3). [1][5] |
20
Med
ⓘ
Sources [2] Official specs [6] Owner reports Median of consistent passes (≥2/3). [2][6] |
| Mop wash temp (dock) (°C) |
70
Med
ⓘ
Sources [1] Official specs [7] Tech media Dock hot-wash temperature. [1][7] |
60
Low
ⓘ
Sources [2] Official specs [8] Retail Q&A Single-source corroboration. [2][8] |
| Suction / airflow (Pa) |
12,000
High
ⓘ
Sources [1] Official specs [3] Lab airflow proxy CFM→Pa used for ranking only. [1][3] |
11,000
High
ⓘ
Sources [2] Official specs [4] Lab notes Manufacturer-stated max. [2][4] |
Aggregated from independent lab tests, official specs, and user evidence. Units normalized (mm, cm, °C). “Confidence” reflects source count/quality and variance.
I’ve been using the Dreame L40 Ultra for a few months now, and overall, it’s been a fantastic addition to my cleaning routine. With pets at home, hair and dirt pile up quickly, but this vacuum manages to keep things spotless. I love how quiet it is—even the charging station operates softly. The customization options through the app are impressive, allowing me to schedule and adjust cleanings exactly as I need. Plus, the built-in camera is a fun bonus; I didn’t expect to use it much, but it’s handy for checking in on my cat!
That said, it’s not without its quirks. The AI and navigation software feel a bit unfinished at times; for instance, it sometimes struggles to go under low furniture or leaves streaks on the base after a run. The water container also could be easier to handle—filling it requires a steady hand! Despite these minor issues, I’m overall very happy with this vacuum, and it’s made keeping my home clean much easier.
The Dreame X40 Ultra is a solid upgrade, especially for those familiar with models like the Roborock S7 Ultra MaxV. It excels at mopping and navigating around obstacles, while the large water tanks and sewage connection add convenience. However, the automatic stain cleaning feature underdelivers, as it fails to scrub tough spots as expected. Additionally, the vacuum sometimes scatters small debris rather than picking it up. Despite these flaws, it remains a reliable flagship option for those seeking strong mopping performance and smart navigation. Overall, it’s a good choice, but expectations for a "flagship" experience could be higher.
All no-go and no-mop zones are set in the Dreame smartphone application (recently, it was renamed as the Xiaomi app) and are part of the map customization capabilities. A no-go zone means that robots can enter this zone (could be set in a pet bowl area or kid’s playground); the no-mop zone is set to prevent robots from mopping a specific area (sensitive carpets or fragile floor).
If you do not plan to carry the robot frequently by yourself, the weight of the robot will not impact the cleaning efficiency. But if you have several stores for cleaning by one robotic cleaner, you need to carry it from one floor to another for charging and self-cleaning to the base station. In this case, the weight of the robot matters. Nevertheless, the weight of robots of different brands with similar functionality does not differ much.
The Dreame X40 Ultra comes with a dust box and dust bag that safely trap all collected dirt and dust. Moreover, it effectively cleans washing pads and washboards using hot water to reduce stain residues and remove all bacterial odors. The advanced color sensing of the used water helps to inform the owner about the necessity of cleaning the dirty water tank.
The functionality of both robots and their base station is close to each other. Both edge brushes and main brushes of L40 and X40 have an anti-tangle feature with a plastic cut to remove all hair. The quick-rotating brush directs all debris, including hair, into the suction port. In the app, you can set no-go or no-mop zones on the special pet’s zone or stay connected with them using real-time voice control and the robot's video camera.
Voice control using Alexa, Siri, or Google Home-compatible devices is available for Dreame models L40 and X40 Ultra. The list of commands is in the manual.
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