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- X40 Ultra vs S8
Dreame X40 Ultra vs Roborock S8
What X40 Ultra does better (4) and where S8 wins (2) — every spec side by side.
Dimensions
Size comparison
X40 UltraS8
| X40 Ultra | S8 | Difference | |
|---|---|---|---|
| Height | 97 mm | 96 mm | +1 mm |
| Width / diameter | 350 mm | 350 mm | = |
| Length | 350 mm | 350 mm | = |
| Weight | 4.2 kg | 4.8 kg | −0.6 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is X40 Ultra better than S8?
- Obstacle avoidanceAI camera + 3D structured light vs AI camera
- Base stationAll-in-one dock (empty + wash) vs Charging dock
- Runtime260 min vs 180 min+44%
- Charging time270 min vs 360 min+33%
Why is S8 better than X40 Ultra?
- Noise level76 dB vs 67 dB+13%
- Dustbin (robot)380 ml vs 400 ml+5%
Specifications
Side by side
| Suction & cleaning | ||
| Suction power | 12,000 Pa | — |
| Dustbin (robot) | 380 ml | 400 ml |
| Main brush | Single main brush | — |
| Side brushes | 1 | — |
| Extending side brush | Yes | — |
| Carpet detection | Yes | — |
| Dirt detection | Yes | — |
| HEPA filter | — | Yes |
| Noise level | 76 dB | 67 dB |
| Navigation & obstacles | ||
| Navigation | Laser (LiDAR) | Laser (LiDAR) |
| Navigation sensors | LiDAR laser (LDS), Wall sensor, Cliff sensors | LiDAR laser (LDS) |
| Obstacle avoidance | AI camera + 3D structured light | AI camera |
| Threshold climbing | 22 mm | — |
| No-go zones / virtual walls | Yes | — |
| Room mapping & room selection | Yes | Yes |
| Mopping | ||
| Mop type | Rotating mop pads | — |
| Mop lifting on carpets | Yes | — |
| Mop lift height | 10.5 mm | — |
| Extending mop (edges) | Yes | — |
| Water tank (robot) | — | 300 ml |
| Base station | ||
| Base station | All-in-one dock (empty + wash) | Charging dock |
| Auto-empty dust station | Yes | — |
| Dust bag (dock) | 3.2 l | — |
| Mop washing in the dock | Yes | — |
| Hot-water mop washing | Yes | — |
| Hot-air mop drying | Yes | — |
| Automatic water refill | Yes | — |
| Plumbed water connection | Yes | — |
| Clean water tank (dock) | 4.5 l | — |
| Dirty water tank (dock) | 4 l | — |
| Battery & runtime | ||
| Battery capacity | 6,400 mAh | — |
| Runtime | 260 min | 180 min |
| Charging time | 270 min | 360 min |
| Cleaning area per charge | — | 300 m² |
| Size & weight | ||
| Width / diameter | 350 mm | 350 mm |
| Length | 350 mm | 350 mm |
| Height | 97 mm | 96 mm |
| Weight | 4.2 kg | 4.8 kg |
| Shape | Round | Round |
| Colours | White | — |
| App & smart home | ||
| App control | Yes | Yes |
| Voice assistants | Amazon Alexa, Google Assistant | Amazon Alexa, Google Assistant, Apple Siri |
