Automower 420iQ
Rated for 1 acre and 45% grade — that is 24.2°, not 45°. On a real lawn, once you allow for borders and travel paths, plan on about 0.8 acres.
Rated area1 acre
Max grade45% · 24.2°
Drive2WD
NavigationSatellite / EPOS
Sold viaDealers
What it handles
Two-wheel drive, which caps how steep it can work. That covers rolling ground, but not a bank you would struggle to walk up.
Navigation is satellite-based without vision or LiDAR, so heavy tree cover is a real risk — it loses its fix under canopy.
If your ground is steeper
These are rated for a similar area but hold more grade than the Automower 420iQ’s 45%.
Segway Navimow X4301 ac · 84% · 4WD
Segway Navimow X4501.5 ac · 84% · 4WD
Mammotion LUBA 3 AWD 50001.25 ac · 80% · AWD
Mammotion LUBA 3 AWD 30000.75 ac · 80% · AWD
Husqvarna Automower 420iQ — straight answers
- What slope can the Automower 420iQ handle?
- 45% grade, which is 24.2° — not 45°. Percent and degrees are different scales and cross only at 100% = 45°.
- How much lawn can the Automower 420iQ cut?
- Rated for 1 acre. After the coverage buffer real lawns need, plan on about 0.8 acres of actual mowing.
- What handles steeper ground than the Automower 420iQ?
- Segway Navimow X430 at 84% (40°); Segway Navimow X450 at 84% (40°); Mammotion LUBA 3 AWD 5000 at 80% (38.7°); Mammotion LUBA 3 AWD 3000 at 80% (38.7°).
How confident we are
Cross-checked against the manufacturer and at least one other source.
Confirmed: 1 acre, 45 PERCENT (Husqvarna publishes percent, never degrees). The 45% applies inside the installation only - at the virtual boundary the rating drops to 15%. Dealer network.