Senix 21 in 170cc FWD A025054-A
A 3-in-1 self-propelled mower for flat lawns with lots of trees and beds to steer around.
Amazon $392.45$392.45
The Senix 21 in 170cc FWD A025054-A is the better lawn mower overall, rated 3.6 to 3.3. The Senix 21 in 170cc FWD A025054-A leads on power and value. The Greenworks 40V 21 in Self-Propelled wins on warranty. The Senix 21 in 170cc FWD A025054-A costs $73.54 less ($392.45 vs $465.99).
Greenworks 40V 21 in Self-Propelled
#16 in Self-propelledFull review
A low cost self propelled mower for lawns up to about a third of an acre, best if you already own Greenworks 40V tools.
Amazon $465.99$465.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Senix 21 in 170cc FWD A025054-A for power (170 cc engine vs 200 Wh of battery included) and value ($18.69 per inch of deck ($392.45, 21 in deck) vs $22.19 per inch of deck ($465.99 with batteries and charger, 21 in deck)).
- Choose the Greenworks 40V 21 in Self-Propelled for warranty (3-year warranty vs 2-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-propelled lawn mower; a clear win is highlighted. How we rank explains each one.
| Factor weight | Senix 21 in 170cc FWD A025054-A | Greenworks 40V 21 in Self-Propelled |
|---|---|---|
| Overall rating | 3.6/5 | 3.3/5 |
| Value 30% | 95 $18.69 per inch of deck ($392.45, 21 in deck) | 74 $22.19 per inch of deck ($465.99 with batteries and charger, 21 in deck) |
| Deck 20% | 12 21 in deck | 12 21 in deck |
| Power 15% | 62 170 cc engine | 14 200 Wh of battery included |
| Cutting modes 15% | 100 3 ways to cut: bag, mulch, side discharge | 100 3 ways to cut: bag, mulch, side discharge |
| Warranty 20% | 25 2-year warranty | 50 3-year warranty |
Specifications
| Senix 21 in 170cc FWD A025054-A | Greenworks 40V 21 in Self-Propelled | |
|---|---|---|
| Cutting | ||
| Deck width | 21 in | 21 in |
| Deck | Steel | Steel |
| Cutting height | 1.2 to 3.8 in, 6 positions | 1.2 to 3.6 in, 7 positions |
| Bag | Yes | Yes |
| Bag capacity | 1.7 bushels | - |
| Mulch | Yes | Yes |
| Side discharge | Yes | Yes |
| Power | ||
| Power | Gas | Battery |
| Engine or battery | 170 cc | 40 V, 5 Ah of battery |
| Battery energy | - | 200 Wh |
| Battery included | - | Yes |
| Runtime | - | 40 min |
| Brushless motor | - | Yes |
| Build | ||
| Drive | Front-wheel drive | Rear-wheel drive |
| Folds upright | - | Yes |
| Weight | 61.7 lb | 61.7 lb |
| Warranty | 2 years | 3 years |
| Battery warranty | - | 3 years |
| Released | - | 2024-01-20 |