Greenworks 80V 21" Brushless Cordless (S vs SENIX 22 Inch Gas Lawn Mower, 201cc 4-Cy
Quick Verdict
For most homeowners, the Greenworks 80V 21" Cordless Self-Propelled Mower is the better choice. It offers lower noise, zero emissions, easier maintenance, and a higher user rating. The SENIX 22" Gas Mower wins for larger, rougher yards where raw power and longer run time matter more than convenience.
Side-by-Side
| Feature | Greenworks 80V 21" | SENIX 22" Gas |
|---|---|---|
| Price | $559.99 | $509.99 |
| Power Source | 80V battery (brushless) | 201cc 4-cycle OHV gas engine |
| Cut Width | 21 inches | 22 inches |
| Self-Propelled | Yes | Yes (variable speed) |
| Best Yard Size | Up to 1/2 acre | 1/2 acre and larger |
| User Rating | 4.4/5 (1,696 reviews) | 4.0/5 (343 reviews) |
Where Greenworks Wins
Ease of use. No gas, oil, or pull cords. Press a button and go. The 80V brushless motor is quiet enough for early morning or late evening mowing without disturbing neighbors.
Low maintenance. No oil changes, spark plugs, or air filters. Store it for winter without draining fuel. The battery charges in about 60 minutes and can be shared with other Greenworks 80V tools.
Better user satisfaction. With a 4.4 rating from nearly 1,700 reviews, owners consistently praise its reliability, cut quality, and ease of starting. The 21-inch deck handles most residential lawns efficiently.
Lighter and cleaner. Cordless mowers are quieter and produce zero emissions. The self-propelled drive is smooth and responsive, making it easy to push on slopes or thick grass.
Where SENIX Wins
Unlimited run time. Gas means no battery swaps or recharge waits. Fill the tank and mow for 45–60 minutes continuously. For yards over 1/2 acre, this avoids the “second battery” problem.
More cutting power. The 201cc OHV engine delivers consistent torque through tall, wet, or thick grass. The 22-inch deck covers slightly more ground per pass, which matters on larger lawns.
Lower upfront cost. At $509.99, it’s $50 less than the Greenworks. If you don’t already own 80V batteries, the gas mower avoids that extra investment.
Variable speed drive. The SENIX offers adjustable ground speed, letting you match pace to terrain or grass density. This is helpful on uneven or hilly properties.
Which Should You Buy
Choose the Greenworks 80V if:
- Your yard is 1/2 acre or less
- You want quiet, low-maintenance operation
- You value convenience and easy starting
- You already own or plan to buy other 80V tools
Choose the SENIX Gas if:
- Your yard is larger than 1/2 acre
- You regularly mow thick, wet, or overgrown grass
- You prefer a lower initial price and don’t mind gas maintenance
- You need unlimited run time without battery management
Both are solid mowers for their intended use. The Greenworks is the modern, hassle-free choice for typical suburban lawns. The SENIX is the traditional workhorse for tougher conditions and bigger properties.