Greenworks 40V 16" Cordless Lawn Mower vs SENIX 20" Gas Lawn Mower, 144 cc Gas Powered
Updated July 2026 — Greenworks 40V 16" Cordless Lawn Mower wins on runtime and length, SENIX 20" Gas Lawn Mower, 144 cc Gas Powered wins on weight and width.
The Greenworks mower excels in maintenance and environmental impact, while the SENIX offers a wider cutting width and lower price.
Why Greenworks 40V 16" Cordless Lawn Mower is better
Maintenance
Zero maintenance costs with no gas or oil changes.
Environmental
Gas-free operation with no emissions.
Weight
35% lighter than traditional mowers for easier handling.
Why SENIX 20" Gas Lawn Mower, 144 cc Gas Powered is better
Price
Lower price at $208.99 compared to $279.99.
Cutting Width
20-inch cutting width covers more ground.
Power
144cc engine handles thicker grass effectively.
Overall score
Specifications
| Spec | Greenworks 40V 16" Cordless Lawn Mower | SENIX 20" Gas Lawn Mower, 144 cc Gas Powered |
|---|---|---|
| Engine Type | Electric | Gas |
| Cutting Height | 1.25-3.375 in | 1.35-3.15 in |
| Warranty | 3 years | 2 years |
| Noise Level | <75 dB | N/A |
| Tool Compatibility | 75+ tools | N/A |
Dimension comparison
Overview of the Greenworks 40V 16" Cordless Lawn Mower
The Greenworks 40V 16" Cordless Lawn Mower is designed for homeowners looking for a lightweight and efficient lawn care solution. Priced at $279.99, it offers gas-like performance without the associated hassle of maintenance. This mower is particularly suitable for small to medium lawns, providing up to 40 minutes of runtime on a single charge, which is ideal for yards up to 1/3 acre. The Greenworks mower also boasts a 75+ tool compatibility, allowing users to expand their toolkit with additional Greenworks products. With a bestseller rank of 813, it has gained popularity among eco-conscious consumers seeking a quieter mowing experience.
Overview of the SENIX 20" Gas Lawn Mower
The SENIX 20" Gas Lawn Mower is a robust option with a price tag of $208.99, making it about 25% cheaper than the Greenworks mower. It features a powerful 144cc gas engine, delivering reliable performance for cutting through thick grass. With a 20-inch cutting width, this mower allows users to cover more ground quickly, making it an efficient choice for larger lawns. Its lightweight design and 7-inch wheels provide excellent maneuverability, while the adjustable cutting height settings cater to varying grass conditions. The SENIX mower holds a bestseller rank of 8566, indicating that it appeals to users who prefer the traditional gas-powered experience.
Performance Comparison
In terms of performance, the Greenworks mower offers a runtime of 40 minutes on a full charge, which is sufficient for small to medium-sized yards. The gas-powered SENIX mower, with its 144cc engine, is designed to tackle thicker grass and uneven terrain, making it a strong contender for larger or more challenging lawns. The Greenworks model is ideal for those who prioritize ease of use and zero emissions, while the SENIX's gas engine can handle tougher mowing tasks effectively. However, the Greenworks mower requires no gas or oil, which could save users over $200 annually in maintenance costs.
Cutting Width and Height Adjustability
When it comes to cutting width, the SENIX mower has a distinct advantage with its 20-inch cutting deck, enabling users to cover more area in fewer passes. In contrast, the Greenworks mower features a smaller 16-inch cutting deck, which may result in longer mowing times for larger lawns. Additionally, the SENIX offers three adjustable cutting heights ranging from 1.35 to 3.15 inches, providing users with versatile options to adapt to different grass types. The Greenworks mower has a single-lever 5-position height control, adapting from 1.25 to 3.375 inches, which also offers flexibility but may not match the SENIX in terms of height settings.
Weight and Maneuverability
Maneuverability is crucial for lawn mowers, especially when dealing with uneven terrain or tight corners. The Greenworks mower is ultra-lightweight, being 35% lighter than traditional models, making it easy to handle and store. This feature is particularly beneficial for users who may struggle with heavier equipment. Conversely, while the SENIX mower is designed to be lightweight as well, its larger cutting width and gas engine may make it slightly more cumbersome to maneuver in tight spaces. The SENIX's 7-inch wheel design does enhance its ability to glide over uneven ground, which can balance out its weight.
Maintenance and Longevity
Maintenance is a significant factor when choosing between electric and gas lawn mowers. The Greenworks mower requires zero maintenance, with no gas or oil changes needed, and operates with whisper-quiet efficiency. This not only saves time but also money in the long run. The SENIX mower, while efficient, does require regular maintenance typical of gas engines, such as oil changes and potential tune-ups, which can add to the total cost of ownership. The Greenworks mower's 3-year tool and battery warranty also outweighs the 2-year warranty of the SENIX, suggesting a longer-term investment assurance.
Environmental Impact
For environmentally conscious consumers, the Greenworks mower stands out with its gas-free operation, contributing to a cleaner and quieter mowing experience. It produces no emissions and operates below 75dB, making it suitable for urban and suburban settings where noise restrictions may apply. In contrast, the SENIX mower, being gas-powered, contributes to emissions and requires users to handle fuel, which may detract from its appeal for eco-friendly buyers. The Greenworks mower aligns with the growing trend of sustainable living, making it a more attractive option for those prioritizing environmental impact.
Which should you buy?
Choosing between the Greenworks 40V 16" Cordless Lawn Mower and the SENIX 20" Gas Lawn Mower ultimately depends on your specific needs and preferences. If you value a lightweight, low-maintenance solution with zero emissions and compatibility with other tools, the Greenworks mower is an excellent choice, despite its higher price of $279.99. However, if you have a larger lawn requiring a more powerful engine and a wider cutting width, the SENIX mower at $208.99 offers a compelling alternative with its efficient gas-powered performance. Consider your lawn size, maintenance preferences, and environmental values to make the best decision for your gardening needs.

