Dreame X40 Ultra
Dreame’s 2024 flagship, now hard to find new; worth it only at a deep discount, as the X50 and L-series robots clean better.
Amazon $589.99$589.99
The Dreame X40 Ultra and the iRobot Roomba Plus 415 Combo are evenly matched, rated 3.9 and 3.9. The Dreame X40 Ultra leads on navigation and mopping. The iRobot Roomba Plus 415 Combo costs $5.97 less ($584.02 vs $589.99).
Prices were last checked November 11, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
iRobot Roomba Plus 415 Combo
A low-profile entry to iRobot’s self-washing mop docks for hard-floor homes; the Plus 515 adds hot-water washing for a little more.
Amazon $584.02$584.02
Which should you buy?
- Choose the Dreame X40 Ultra for navigation (LiDAR + camera vs LiDAR) and mopping (Dual spinning pads, leaves its mop at the dock for carpet, extends to edges vs Dual spinning pads, lifts 10 mm, extends to edges).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dreame X40 Ultra | iRobot Roomba Plus 415 Combo |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Cleaning 30% | 37 measured 80% of sand from carpet, 75.5% of pet hair, some hair tangled (0.8) | 48 not yet tested; estimated from 3 tested iRobot robots and the median of the 80 tested robots |
| Value 25% | 68 $590 | 69 $584 |
| Dock 20% | 90 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent | 100 Self-empties the bin, washes the mop, hot-air mop drying |
| Navigation 15% | 100 LiDAR + camera | 65 LiDAR |
| Mopping 10% | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges | 76 Dual spinning pads, lifts 10 mm, extends to edges |
Independent tests
Dreame X40 Ultra
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 80% | 75.5% | 0.8 | 1,287 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
iRobot Roomba Plus 415 Combo
No independent test published yet.
Specifications
| Dreame X40 Ultra | iRobot Roomba Plus 415 Combo | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 12,000 Pa | - |
| Main brush | Liftable rubber brush (TriCut Brush 2.0 sold separately) | tangle-free rubber brushes |
| Dustbin | 300 mL | - |
| Extending side brush | Yes | Yes |
| Mopping | ||
| Mop | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges | Dual spinning pads, lifts 10 mm, extends to edges |
| Mop lift | 10.5 mm | 10 mm |
| Leaves mop at dock | Yes | No |
| Extending mop | Yes | Yes |
| Water tank | 80 mL | - |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | - |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | - |
| Hot-air drying | Yes | Yes |
| Detergent dosing | Yes | - |
| Water hookup option | No | - |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + camera | LiDAR |
| Obstacle avoidance | RGB camera plus 3D structured light, recognises 120 object types | Object sensing (sensor type not given) |
| Climbs thresholds | 22 mm | - |
| Voice assistants | Alexa, Siri, Google Home | - |
| Build | ||
| Height | - | 3.3 in (84 mm) |
| Battery | 6,400 mAh | 5,200 mAh |
| Weight | - | 6.4 lb (2.9 kg) |
| Warranty | 3 years | - |
| Released | 2024-04 | 2026-07 |