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- Roomba 775 combo vs RVM 4 Comfort Extra
iRobot Roomba 775 combo vs Kärcher RVM 4 Comfort Extra
What Roomba 775 combo does better (1) and where RVM 4 Comfort Extra wins (3) — every spec side by side.
vs
5.5Cleaning power7.7
2.4Navigation8.5
Why is Roomba 775 combo better than RVM 4 Comfort Extra?
- Charging time180 min vs 230 min+28%
Why is RVM 4 Comfort Extra better than Roomba 775 combo?
- Obstacle avoidanceBasic sensors (infrared / bumper) vs AI camera
- Base stationAuto-empty dock vs All-in-one dock (empty + wash)
- Noise level70 dB vs 66 dB+6%
Specifications
Side by side
| Suction & cleaning | ||
| Suction power | — | 15,000 Pa |
| Dustbin (robot) | 400 ml | — |
| Main brush | — | Single main brush |
| Anti-tangle brush | Yes | — |
| Side brushes | — | 1 |
| Carpet detection | — | Yes |
| HEPA filter | Yes | — |
| Noise level | 70 dB | 66 dB |
| Navigation & obstacles | ||
| Navigation | — | Laser (LiDAR) |
| Navigation sensors | Cliff sensors | LiDAR laser (LDS), Wall sensor, Cliff sensors, Ultrasonic sensor |
| Obstacle avoidance | Basic sensors (infrared / bumper) | AI camera |
| Threshold climbing | 15 mm | — |
| No-go zones / virtual walls | Yes | — |
| Room mapping & room selection | — | Yes |
| Mopping | ||
| Mop type | — | Rotating mop pads |
| Mop lifting on carpets | — | Yes |
| Extending mop (edges) | — | Yes |
| Base station | ||
| Base station | Auto-empty dock | All-in-one dock (empty + wash) |
| Auto-empty dust station | Yes | Yes |
| Dust bag (dock) | — | 2.3 l |
| Mop washing in the dock | — | Yes |
| Hot-air mop drying | — | Yes |
| Automatic water refill | — | Yes |
| Clean water tank (dock) | — | 2.5 l |
| Dirty water tank (dock) | — | 3 l |
| Battery & runtime | ||
| Battery capacity | — | 5,200 mAh |
| Runtime | — | 160 min |
| Charging time | 180 min | 230 min |
| Size & weight | ||
| Width / diameter | — | 350 mm |
| Length | — | 350 mm |
| Height | — | 100 mm |
| Weight | 3.9 kg | 3.8 kg |
| Shape | — | Round |
| Colours | — | White |
| App & smart home | ||
| App control | — | Yes |
| Remote control | Yes | — |
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