Dreame L40s Ultra vs iRobot Roomba 205 DustCompactor Combo
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the Dreame L40s Ultra costs $500 and the iRobot Roomba 205 DustCompactor Combo costs $470, so the iRobot Roomba 205 DustCompactor Combo is $30 cheaper. The Dreame L40s Ultra scores higher in our ranking (8.8 vs 5.7 out of 10). Pick the Dreame L40s Ultra for pet owners with carpet on a budget. Pick the iRobot Roomba 205 DustCompactor Combo for small spaces with no room for a dock. The iRobot Roomba 205 DustCompactor Combo wins 2 of 3 points we can measure.
Who wins, point by point
The iRobot Roomba 205 DustCompactor Combo wins 2 of 3 points we can measure. Built from today's prices, the specs and independent tests for these two robots.
| L40s Ultra | iRobot Roomba 205 DustCompactor Combo | Winner | |
|---|---|---|---|
| Price today | $500 | $470 | iRobot Roomba 205 DustCompactor Combo |
| Onboard bin | 310 mL | 1.5 L | iRobot Roomba 205 DustCompactor Combo |
| Robot height (fits under furniture) | 3.82 in | 3.98 in | L40s Ultra |
- You care most about robot height (fits under furniture) (3.82 in vs 3.98 in)
- Best for pet owners with carpet on a budget
- You want to spend less (saves $30)
- You care most about onboard bin (1.5 L vs 310 mL)
- Best for small spaces with no room for a dock
- Suction
- 19,000 Pa claimed
- Navigation
- LDS LiDAR
- Mopping
- Dual spinning mops
- Runtime
- Up to 220 min in quiet
Strong pet hair cleaner with a full dock at a deep discount
Full Dreame L40s Ultra review, pros and cons →- Suction
- iRobot claims 70x
- Navigation
- ClearView LiDAR
- Mopping
- Reusable microfiber pad
LiDAR Roomba that compacts dirt onboard instead of using a big dock
Full iRobot Roomba 205 DustCompactor Combo review, pros and cons →Side by side
| Dreame L40s Ultra | iRobot Roomba 205 DustCompactor Combo | |
|---|---|---|
| Price | $500 | $470 |
| 3 year cost | $500 | $470 |
| Our score | 8.8/10 | 5.7/10 |
| Rank in Floors | #6 | #45 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | n/a |
| Suction | 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above average | iRobot claims 70x the suction of Roomba 600 series, 4 levels; no Pa figure published |
| Navigation | LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute | ClearView LiDAR, up to 3 maps (iRobot) |
| Obstacle avoidance | 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7 of 24 objects | Basic; TechRadar saw it push toys and drag a cable, Tech Advisor saw it suck up a glove and get stuck |
| Mopping | Dual spinning mops, 10.5 mm lift, extend and auto removal (Dreame); Vacuum Wars measured 0.95 g water left and a 259 combined mop score | Reusable microfiber pad with Carpet Detect to avoid rugs (iRobot); Tech Advisor found it mostly spread mess |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | No dock emptying; compacts debris onboard, claimed up to 60 days (iRobot); TechRadar needed to empty it after 8 days |
| Dock features | Auto empty, 167 F (75 C) hot water mop wash, hot air drying, self cleaning washboard, auto detergent and water refill, 4.5 L clean and 4.0 L dirty tanks; water hookup kit sold separately (Dreame) | Small charging base only (Tech Advisor) |
| Runtime | Up to 220 min in quiet mode from 5,200 mAh (Dreame); Vacuum Wars estimated about 1,935 sq ft per charge | Not published; iRobot says it covers up to 1,000 sq ft |
| Dustbin | 310 ml robot bin plus 3.2 L dock bag (Dreame) | About 1.5 L compacting bin (TechRadar, Tech Advisor) |
| Height | 3.82 in (Dreame) | 3.98 in (robot 14.1 x 14.09 x 3.98 in, iRobot) |
| Pet hair | HyperStream Detangling DuoBrush (Dreame); Vacuum Wars measured 91% pet hair pickup, 92% carpet sand removal and 0% hair wrap | No measured pet hair result published in the reviews we read |
| App | Dreamehome app with third party voice assistants only (Dreame); Vacuum Chef notes no built in voice assistant or live video | Roomba Home app; works with Alexa, Siri and Google Assistant (iRobot) |
| Threshold | 1.57 in double layer and 0.87 in single steps (Dreame) | Not published |
| Noise | Vacuum Chef measured 78 dB at max suction | TechRadar measured an average of 78 dB from five feet |
| Best for | pet owners with carpet on a budget | small spaces with no room for a dock |
| Skip if | your floor often has cables, socks or toys | you want real mopping or good obstacle avoidance |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Dreame L40s Ultra
- Vacuum Wars (3.51 Vacuum Wars stars): 92% carpet sand removal, 91% pet hair pickup and 0% hair wrap with the DuoBrush, about 1,935 sq ft per charge, but only 7 of 24 obstacles avoided. Source
- Vacuum Chef (95/100): Scored 95/100 in its real world cleaning tests, measured 490 FPM carpet airflow and 78 dB at max suction. Obstacle avoidance varied by floor and object. Source
iRobot Roomba 205 DustCompactor Combo
- TechRadar (Performance 2.5/5): Measured an average of 78 dB from five feet. The roughly 1.5 L bin needed emptying after eight days. It pushed aside toys and dragged a phone cable. Called a crushing disappointment. Source
- Tech Advisor: Good carpet cleaning and LiDAR navigation, but mopping mostly spread mess and it got stuck on furniture bases and thin table legs. Source
Questions buyers ask
Which is better, the Dreame L40s Ultra or the iRobot Roomba 205 DustCompactor Combo?
The Dreame L40s Ultra scores higher in our ranking (8.8 vs 5.7 out of 10). Pick the Dreame L40s Ultra for pet owners with carpet on a budget. Pick the iRobot Roomba 205 DustCompactor Combo for small spaces with no room for a dock.
Which is cheaper?
The iRobot Roomba 205 DustCompactor Combo at $470, versus $500 for the Dreame L40s Ultra, checked Nov 4, 2026. Over 3 years with running costs: $500 vs $470.
What is the difference between the L40s Ultra and the Roomba 205 DustCompactor Combo?
Suction: 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above… on the L40s Ultra, iRobot claims 70x the suction of Roomba 600 series, 4 levels; no Pa figure published on the Roomba 205 DustCompactor Combo. Navigation: LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute on the L40s Ultra, ClearView LiDAR, up to 3 maps (iRobot) on the Roomba 205 DustCompactor Combo. Obstacle avoidance: 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7… on the L40s Ultra, Basic; TechRadar saw it push toys and drag a cable, Tech Advisor saw it suck up a glove… on the Roomba 205 DustCompactor Combo.
Also consider at this price
See all ranked →More comparisons
- Dreame L40s Ultra vs Dreame X50 Ultra
- Dreame L40 Ultra Gen 2 vs Dreame L40s Ultra
- Dreame L40s Ultra vs Dreame L40s Ultra AE
- Dreame L40s Ultra vs Dreame L40s Ultra CE
- Dreame L40s Ultra vs MOVA P10 Pro Ultra
- Dreame L40s Ultra vs Roborock Qrevo S Pro
- Dreame D30 Ultra vs Dreame L40s Ultra
- Dreame L40s Ultra vs Roborock Qrevo S5V
All robot vacuums, ranked
See the ranking →Affiliate links. We may earn a commission. It never changes our score. Disclosure