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- RVM 4 Comfort Extra vs Qrevo Curv 2 Flow
Kärcher RVM 4 Comfort Extra vs Roborock Qrevo Curv 2 Flow
What RVM 4 Comfort Extra does better (1) and where Qrevo Curv 2 Flow wins (6) — every spec side by side.
vs
7.7Cleaning power8.3
8.5Navigation8.2
7.8Mopping9.2
4.6Base station5.4
6.6Battery9.2
Dimensions
Size comparison
RVM 4 Comfort ExtraQrevo Curv 2 Flow
| RVM 4 Comfort Extra | Qrevo Curv 2 Flow | Difference | |
|---|---|---|---|
| Height | 100 mm | 119 mm | −19 mm |
| Width / diameter | 350 mm | 353 mm | −3 mm |
| Length | 350 mm | 353 mm | −3 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is RVM 4 Comfort Extra better than Qrevo Curv 2 Flow?
- Height100 mm vs 119 mm+19%
Why is Qrevo Curv 2 Flow better than RVM 4 Comfort Extra?
- Mop typeRotating mop pads vs Roller mop
- Runtime160 min vs 242 min+51%
- Suction power15,000 Pa vs 20,000 Pa+33%
- Clean water tank (dock)2.5 l vs 4 l+60%
- Charging time230 min vs 180 min+28%
- Dust bag (dock)2.3 l vs 2.5 l+9%
Specifications
Side by side
| Suction & cleaning | ||
| Suction power | 15,000 Pa | 20,000 Pa |
| Dustbin (robot) | — | 324 ml |
| Main brush | Single main brush | Single main brush |
| Anti-tangle brush | — | Yes |
| Side brushes | 1 | 2 |
| Carpet detection | Yes | Yes |
| Noise level | 66 dB | 65 dB |
| Navigation & obstacles | ||
| Navigation | Laser (LiDAR) | Laser (LiDAR) |
| Navigation sensors | LiDAR laser (LDS), Wall sensor, Cliff sensors, Ultrasonic sensor | LiDAR laser (LDS), Wall sensor, Cliff sensors |
| Obstacle avoidance | AI camera | AI camera |
| No-go zones / virtual walls | — | Yes |
| Room mapping & room selection | Yes | Yes |
| Mopping | ||
| Mop type | Rotating mop pads | Roller mop |
| Mop lifting on carpets | Yes | Yes |
| Mop lift height | — | 15 mm |
| Extending mop (edges) | Yes | Yes |
| Water tank (robot) | — | 100 ml |
| Base station | ||
| Base station | All-in-one dock (empty + wash) | All-in-one dock (empty + wash) |
| Auto-empty dust station | Yes | Yes |
| Dust bag (dock) | 2.3 l | 2.5 l |
| Mop washing in the dock | Yes | Yes |
| Hot-water mop washing | — | Yes |
| Hot-air mop drying | Yes | Yes |
| Automatic water refill | Yes | Yes |
| Clean water tank (dock) | 2.5 l | 4 l |
| Dirty water tank (dock) | 3 l | 3 l |
| Battery & runtime | ||
| Battery capacity | 5,200 mAh | 5,200 mAh |
| Runtime | 160 min | 242 min |
| Charging time | 230 min | 180 min |
| Size & weight | ||
| Width / diameter | 350 mm | 353 mm |
| Length | 350 mm | 353 mm |
| Height | 100 mm | 119 mm |
| Weight | 3.8 kg | — |
| Shape | Round | Round |
| Colours | White | White |
| App & smart home | ||
| App control | Yes | Yes |
| Voice assistants | — | Amazon Alexa, Google Assistant, Apple Siri |
| Matter | — | Yes |
| Live camera view / video call | — | Yes |
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