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Robovations™
Robot Autonomy, Classified
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Comparison · 2 robots

Stihl iMow 7 · Worx Landroid M 20V

All robot lawn mowers. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.

  1. Stihl iMow 7
  2. Worx Landroid M 20V

Up to three

01 Classification

What each one does on its own.

The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.

V
Generalized
Any task, any setting
IV
Environmental
Handles new obstacles without help
III
Conditional
Finishes familiar jobs on its own
II
Assisted
Runs preset routines, needs rescue
Stihl iMow 7Worx Landroid M 20V
I
Manual
One action, on command
02 Assessment

Where they actually differ.

The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.

Capability

Task completion16% of score
Does it finish the job it is sold to do, unattended
  • Stihl iMow 785
  • Worx Landroid M 20V85
18median 72 across 429 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
  • Stihl iMow 763
  • Worx Landroid M 20V50
0median 70 across 417 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
  • Stihl iMow 784
  • Worx Landroid M 20V50
18median 52 across 318 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
  • Stihl iMow 772
  • Worx Landroid M 20V50
28median 68 across 393 scored robots100

Dependability

Field failure rate16% of score
Documented hardware failures per owner-year
  • Stihl iMow 780
  • Worx Landroid M 20V91
6median 70 across 355 scored robots100
Software stability14% of score
Whether updates fix more than they break
  • Stihl iMow 781
  • Worx Landroid M 20V74
15median 65 across 340 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
  • Stihl iMow 785
  • Worx Landroid M 20V93
0median 62 across 425 scored robots100

Ownership burden

Routine maintenance12% of score
Hands-on time it asks for in normal operation
  • Stihl iMow 749
  • Worx Landroid M 20V64
22median 67 across 430 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
  • Stihl iMow 7100
  • Worx Landroid M 20V71
8median 69 across 430 scored robots100
03 Measured against the class

How far apart is a long way?

A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.

Charge time106 with a published figure
  • Stihl iMow 7200 min
  • Worx Landroid M 20V90 min
30 minmedian 90 min300 min
Noise104 with a published figure
  • Stihl iMow 761 dB
  • Worx Landroid M 20V59 dB
50 dBmedian 60 dB82 dB
Weight116 with a published figure
  • Stihl iMow 733.1 lbs
  • Worx Landroid M 20V29.8 lbs
13 lbsmedian 30 lbs134 lbs
Height117 with a published figure
  • Stihl iMow 78.3 in
  • Worx Landroid M 20V10.4 in
7.5 inmedian 11 in16.5 in

Not compared, because fewer than two of these robots carry a published figure: Price, Suction, Runtime.

04 Ownership

What the numbers leave out.

The trade-off

What each design gives up to be good at what it is good at.

Stihl iMow 7

Wire installation is a permanent setup: any lawn reconfiguration requires physical wire relocation, unlike virtual-boundary or GPS-based alternatives.

Systematic mowing pattern reduces pass overlap compared to random-path alternatives, but the iMow 7 slows for what its ultrasonic sensors register and bumps the rest; it does not plan a route around a newly placed obstacle.

Worx Landroid M 20V

Boundary wire containment eliminates extension cord tethering but locks mower to fixed yard geometry.

Cordless runtime provides freedom from outlets and gas but limits mowing area to 0.33 acres per charge cycle.

Who each one is wrong for

Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.

Stihl iMow 7
Owners who frequently reconfigure lawn areas or garden beds
Any structural landscaping change requires physical wire relocation. Changing zones means reconfiguring the boundary wire system.
Buyers seeking GPS, RTK, or virtual-boundary wire-free operation
The iMow 7 uses a physical perimeter wire only. Wire-free robotic mower alternatives are necessary for owners wanting GPS or virtual boundaries.
Lawns with complex island beds, narrow corridors, or multi-zone layouts
Each zone or corridor requires a dedicated guide wire segment. Complex layouts increase installation complexity and risk unmowed strips.
Households where children or animals routinely occupy the mowing zone
Ultrasonic sensors slow the mower for larger objects, but nothing on it identifies a person or a pet, and low objects are detected by contact. Scheduling sessions when the lawn is clear remains the reliable mitigation.
Lots significantly above 5,000 square meters
Rated coverage is 5,000 square meters and the iMOW 7 is the top of the range, so there is no larger model to move up to. Properties beyond it need more than one machine in adjacent zones.
Worx Landroid M 20V
Yards larger than a quarter acre
Both US Landroid M models are rated for 1/4 acre. Larger properties fall outside the rated coverage and need multiple mowing days or a larger machine.
Frequently changing yard layouts
Boundary wire assumes fixed perimeter. Adding beds, pools, or storage sheds mid-season requires wire rerouting.
Sloped or hilly terrain
Worx rates the US Landroid M at 20 degrees, or 35 percent, on the WR140 page, and 30 percent, about 17 degrees, on the WR147 page. Ground beyond the rating for your unit risks stalling and manual retrieval.
Owners opposed to mulching discharge
No bagging or side-discharge option. Mulch-only operation unsuitable for allergies or aesthetic preferences.

What stays your job

The upkeep ownership hands back to you, whatever the autonomy level says.

Stihl iMow 7
  • After every use: Clear grass clippings and debris from blade disc and chassis to prevent buildup.
  • Monthly: Inspect perimeter wire at surface crossings and obstacles for wear or animal damage.
  • Every 3–6 months: Replace blade disc when cut quality declines; replacement blades cost $10–$25 per set.
  • Annually: Full perimeter wire inspection including connectors and guide wire segments; clean charging station contacts.
  • Annually: Test rain sensor auto-return function before season; clean sensor lens if blocked by residue.
  • As needed: Splice or reposition wire sections after landscaping or tool-induced damage.
Worx Landroid M 20V
  • After every use: Inspect the wheels for wrapped grass and debris.
  • Weekly: Check boundary wire for physical damage or corrosion; test dock charging connection.
  • Monthly: Clear compacted clippings from the underbody and check that the cutting disc turns freely.
  • As blades wear: Rotate and flip all three blades together, then replace the full set. A spare set ships in the box; replacements sell twelve to a kit (WA0190).
  • Every 3–6 months: Inspect battery contacts for corrosion; clean charging dock connectors.
  • Annually: Replace boundary wire if exposed to winter salt or damage; service wheel bearings.
05 Evidence

How much each of these is standing on.

Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.

Evidence behind each classification
Robot Evidence status Sources reviewed Last assessed
Stihl iMow 7 Pending 5 Aug 2026
Worx Landroid M 20V Pending 3 Aug 2026

Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.