Greenworks 80V 21" Brushless Cordless (S vs BILT HARD 21" Self Propelled Gas Lawn Mo
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Quick Verdict
The Greenworks 80V wins for homeowners who want a quiet, low-maintenance electric mower with strong battery performance and a self-propel system that handles moderate slopes. The BILT HARD gas mower wins for those needing raw power for large, thick lawns or remote properties where battery runtime is a concern, and who prefer a lower upfront cost.
Side-by-Side
| Feature | Greenworks 80V 21" | BILT HARD 21" Gas |
|---|---|---|
| Price | $559.99 | $389.99 |
| Power Source | 80V battery (brushless motor) | 201cc 4-cycle gas engine |
| Cut Width | 21 inches | 21 inches |
| Self-Propelled | Yes | Yes |
| Best Yard Size | Up to 1/2 acre (per charge) | 1/3 to 1 acre (with refueling) |
| Weight | ~60 lbs (with battery) | ~75 lbs |
| Noise Level | ~75 dB | ~95 dB |
| Runtime | ~45–60 min per charge | Unlimited with gas refills |
| Maintenance | Minimal (blade sharpening only) | Oil changes, air filter, spark plug, fuel stabilizer |
| User Rating | 4.4/5 (1,696 reviews) | 4.1/5 (820 reviews) |
Where Greenworks Wins
- Ease of use: No pull cords, no gas mixing, no oil changes. Press a button and go. The brushless motor is nearly maintenance-free and delivers instant torque.
- Quiet operation: At about 75 dB, it’s comfortable for early mornings or noise-sensitive neighborhoods. Gas mowers like the BILT HARD run at around 95 dB – twice as loud to the ear.
- Lighter weight: Around 60 lbs with battery installed, making it easier to maneuver and lift for storage. The BILT HARD weighs roughly 75 lbs.
- Better user ratings: 4.4 out of 5 stars from nearly 1,700 reviews indicates consistent reliability and satisfaction. The 80V battery platform also powers other Greenworks tools (trimmers, blowers, chainsaws).
- No emissions: Zero exhaust fumes – ideal for enclosed yards or garage charging.
Where BILT Wins
- Lower upfront cost: $389.99 vs. $559.99 – a savings of $170. That gap can buy a spare battery for the Greenworks or cover fuel for several seasons.
- Unlimited runtime: As long as you have gas, the mower runs. No waiting for batteries to recharge (Greenworks batteries take 60–90 minutes). Best for yards over 1/2 acre or properties without easy access to power for charging.
- Raw power: The 201cc engine provides consistent torque through thick, wet grass or uneven terrain. Gas engines don’t lose power as the fuel level drops (battery mowers slow down as charge depletes).
- No battery degradation: Batteries lose capacity over time (typically 20% after 3–5 years). The gas engine, with proper maintenance, can run reliably for a decade or more.
- Wider availability of fuel: Gas stations are everywhere; finding replacement batteries for an aging model may be harder down the road.
Which Should You Buy
Choose the Greenworks 80V if:
You have a yard up to 1/2 acre, you prioritize quiet operation and low maintenance, you already own other 80V tools, and you’re willing to pay a premium for convenience. It’s ideal for suburban