Greenworks 80V 21" Brushless Cordless (S vs SENIX 22 Inch 3-in-1 Gas Lawn Mower, 201
Quick Verdict
For most homeowners, the Greenworks 80V 21" Brushless Cordless Self-Propelled Lawn Mower is the better choice. It offers quieter, lower-maintenance operation with the convenience of self-propulsion and battery power, making it ideal for typical suburban yards. The SENIX 22 Inch 3-in-1 Gas Lawn Mower wins on raw power and lower upfront cost, suiting those with larger, more demanding lawns who don’t mind gas, oil, and noise.
Side-by-Side
| Feature | Greenworks 80V 21" | SENIX 22" Gas |
|---|---|---|
| Price | $559.99 | $431.99 |
| Power Source | 80V battery (brushless motor) | 201cc gas engine |
| Cut Width | 21 inches | 22 inches |
| Self-Propelled | Yes | Yes (rear wheel, single speed) |
| Mowing Options | 3-in-1 (mulch, bag, side discharge) | 3-in-1 (mulch, bag, side discharge) |
| Best Yard Size | Up to 1/2 acre | 1/2 to 1 acre |
| Weight | ~65 lbs (with battery) | ~80 lbs (empty) |
| Noise Level | Quiet (electric) | Loud (gas engine) |
| Maintenance | Minimal (no oil, no gas) | Regular (oil changes, spark plugs, fuel) |
Where Greenworks Wins
Ease of use and convenience. The Greenworks is an electric mower, so you never deal with gas, oil, or pull cords. Just insert the battery and press a button. Its brushless motor is more efficient and quieter than a gas engine, making early-morning mowing neighbor-friendly. The self-propelled drive is variable speed (trigger-controlled), giving you smooth, effortless movement across flat or gently sloped lawns. At 65 pounds, it’s lighter than the SENIX, making it easier to maneuver around flowerbeds and push up inclines. The 80V battery system is shared with other Greenworks tools, so if you already own their trimmers or blowers, you can use the same batteries. For a 1/4- to 1/2-acre lot, one charge typically covers the entire lawn.
Where SENIX Wins
Power and cutting capability for tough conditions. The 201cc gas engine delivers consistent, high-torque power that won’t fade as the battery drains. This matters for tall, thick, or wet grass, or if you need to mulch leaves in the fall. The 22-inch cutting deck is an inch wider than the Greenworks, covering more ground per pass—helpful on larger lawns. At $431.99, it costs $128 less than the Greenworks, a meaningful saving if you’re on a tight budget. The single-speed rear-wheel drive provides reliable traction on uneven terrain, though it lacks the variable-speed control of the Greenworks. For yards over 1/2 acre, the SENIX’s unlimited runtime (just refill gas) is a clear advantage—you won’t need to stop and recharge batteries.
Which Should You Buy
Choose the Greenworks 80V 21" if: you have a 1/4- to 1/2-acre lawn, value quiet operation and low maintenance, and want a self-propelled mower that’s easy to start and store. It’s ideal for homeowners who prioritize convenience and have a flat or gently sloped yard.
Choose the SENIX 22" Gas if: you have a 1/2- to 1-acre lawn, regularly cut thick or wet grass, or need maximum power for mulching and leaf management.