We may earn a commission when you buy through our links. Rankings are formula-based and never paid for. As an Amazon Associate I earn from qualifying purchases. Disclosure

Ryobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit vs Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)

Two of the cordless lawn mowers in our best cordless lawn mowers: greenworks & ryobi push and self-propelled comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.

Affiliate disclosure: We earn a commission if you buy through links on this page, at no extra cost to you. It never affects our rankings, which come from the published scoring formula. As an Amazon Associate I earn from qualifying purchases. Learn more.

Best for: The widest deck and biggest battery here

Check price at Amazon
6.5/10

Best for: 8 Ah 80V battery rated for 3/4 acre

Check price at Amazon

Spec-by-spec comparison

Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.

SpecRyobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower KitGreenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)Weight
Deck widthThe cutting-deck width in the maker's name or spec table. A wider deck cuts more grass per pass. 30 in 21 in 25%
Kit battery energyBattery energy in watt-hours, computed as volts x amp-hours of the battery or batteries the maker says come in the kit (for example 40 V x 6 Ah x 2 = 480 Wh). Bigger batteries generally mean more work per charge from the same tool. 800 Wh 640 Wh 20%
RuntimeThe maker's runtime claim with the batteries in the kit. Thick or wet grass and self-propel use shorten it. 90 min 80 min 15%
Rated lawn sizeThe lawn size the maker says one charge (or the kit's batteries) handles, such as "up to 3/4 acre". 1 acres 0.75 acres 15%
Cutting-height rangeComputed as the maker's highest cutting height minus its lowest. 3 in 2.62 in 10%
Self-propelledYes when the mower drives its own wheels. That helps on slopes and with heavy decks. Yes Yes 10%
Listed weightThe weight the maker lists. Makers don't always say whether it includes the battery, so treat small gaps as noise. 117 lb 89.1 lb 5%
Kit battery80 V 10 Ah = 800 Wh (computed)80 V 8 Ah = 640 Wh (computed)info
Cutting height1–4 in1.38–4 ininfo
Cutting-height range3 in (computed: max minus min)2.62 in (computed: max minus min)info
Mowing functionsMulching, bagging and side dischargeNot listedinfo
Rated lawn sizeNot listedUp to 3/4 acre (0.75 acres, computed)info
YardPick score9.5/106.5/10100%

Where each one comes out ahead

Ryobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit

Better published figure on: Deck width, Kit battery energy, Runtime, Rated lawn size, Cutting-height range.

What we like

  • Top deck width in this comparison (30 in)
  • Top kit battery energy in this comparison (800 Wh)
  • Top runtime in this comparison (90 min)
  • Top rated lawn size in this comparison (1 acres)

Watch out for

  • Highest listed weight in this comparison (117 lb)

Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S)

Better published figure on: Listed weight.

What we like

    Watch out for

      Verdict

      On published specs, the Ryobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit scores higher (9.5 vs 6.5). Specs don't capture sound character or feel, so weigh the pros and cons above too.

      • Choose the Ryobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit if this sounds like you: the widest deck and biggest battery here.
      • Choose the Greenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S) if this sounds like you: 8 Ah 80V battery rated for 3/4 acre.
      Ryobi 80V HP Brushless 30" Self-Propelled Multi-Blade Mower Kit on AmazonGreenworks 80V 21" 4-in-1 Self-Propelled Mower (LM2108S) on Amazon
      Spec sources

      Related comparisons