SENIX 144 cc Gas Lawn Mower, vs WORX Nitro 21" Cordless Lawn Mower, Electric Mower
Updated July 2026 — SENIX 144 cc Gas Lawn Mower, wins on warranty and weight, WORX Nitro 21" Cordless Lawn Mower, Electric Mower wins on price and runtime.
The SENIX mower offers powerful gas performance at a lower price, while the WORX mower provides advanced features and quieter operation.
Why SENIX 144 cc Gas Lawn Mower, is better
Price
SENIX is $254.99, cheaper than WORX at $359.99.
Cutting Width
Both have a cutting width of 21 inches.
Warranty
SENIX offers a 2-year warranty.
Why WORX Nitro 21" Cordless Lawn Mower, Electric Mower is better
Technology
WORX features Intellicut technology for optimized power.
Noise Level
WORX operates quieter due to its electric motor.
Mobility
WORX is self-propelled with variable speed.
Overall score
Specifications
| Spec | SENIX 144 cc Gas Lawn Mower, | WORX Nitro 21" Cordless Lawn Mower, Electric Mower |
|---|---|---|
| Engine Type | Gas | Electric |
| Power Source | Gasoline | Battery |
| Self-Propelled | No | Yes |
| Cutting Height | 1.25-3.75" | 1.5-4" |
| Mulching | Yes | Yes |
Dimension comparison
Overview of the SENIX 144 cc Gas Lawn Mower and WORX Nitro 21" Cordless Lawn Mower
The SENIX 144 cc Gas Lawn Mower is priced at $254.99, making it about 17% cheaper than the WORX Nitro 21" Cordless Lawn Mower, which retails for $359.99. Both products are designed to tackle lawn care efficiently but cater to different preferences and needs. The SENIX model operates on a gas engine, while the WORX mower is cordless and electric, offering contrasting user experiences.
Engine and Power
The SENIX mower features a 144 cc 4-cycle gas engine, which is designed to deliver explosive power for large mowing tasks. This engine is particularly effective on various terrains, including rugged slopes, and offers a cutting width of 21 inches. In contrast, the WORX Nitro utilizes a brushless motor that delivers 40% more power and 10% longer runtime compared to previous models. Although both mowers have a cutting width of 21 inches, the WORX mower operates on two 20V 5.0Ah batteries, promoting a quieter and more environmentally friendly mowing experience.
Cutting and Height Adjustment
The SENIX mower provides a 2-in-1 cutting system with both mulching and side discharge options, making it versatile for grass disposal. It also features six cutting height adjustments ranging from 1.25 inches to 3.75 inches, allowing for customized lawn care. On the other hand, the WORX mower boasts 3-in-1 functionality, including mulching, bagging, and rear side-discharging. It also offers a single lever with seven height positions, adjustable from 1.5 inches to 4 inches, giving users flexibility in managing their lawn height preferences.
Mobility and Ease of Use
Mobility is a crucial factor when comparing these two mowers. The SENIX features a high-wheel design with 8-inch front wheels and 11-inch rear wheels, enhancing its ability to navigate rugged terrain. Meanwhile, the WORX Nitro is a self-propelled mower with variable speed settings, allowing the user to control their mowing speed up to 3.7 MPH. This feature significantly reduces the physical effort required to mow, particularly on inclines, making it easier for users who may struggle with pushing a traditional mower.
Maintenance and Longevity
Maintenance requirements differ considerably between the two models. The SENIX mower, operating on gas, may require more frequent maintenance checks, including oil changes and fuel management. However, it comes with a 2-year warranty, providing peace of mind for users. Conversely, the WORX mower's electric design means reduced maintenance since there are no gas or oil components. Its high-strength polymer deck is engineered to resist corrosion and impact damage, promising a longer-lasting product life without the typical wear associated with gas engines.
Noise Levels
When it comes to noise levels, the SENIX gas mower tends to be louder due to its internal combustion engine. This can be a drawback for those who prefer a quieter mowing experience or live in noise-sensitive neighborhoods. On the other hand, the WORX Nitro's electric motor operates considerably quieter, allowing for a more pleasant mowing experience without disturbing the surrounding environment. This trait makes the WORX mower a strong candidate for suburban areas where noise restrictions may apply.
Price and Value
The SENIX mower is priced at $254.99, positioning it as the more budget-friendly option, especially for those who prioritize initial purchase costs. In contrast, the WORX mower's price of $359.99 reflects its advanced technology and features like Intellicut technology, which optimizes power usage based on grass thickness. While the SENIX mower has a sales rank of 18,401, indicating a moderate level of popularity, the WORX mower ranks significantly higher at 4,191, suggesting it may be more favored by consumers seeking modern features and ease of use.
Which should you buy?
Choosing between the SENIX 144 cc Gas Lawn Mower and the WORX Nitro 21" Cordless Lawn Mower ultimately depends on your specific needs and preferences. If you are looking for a cost-effective option with powerful gas performance and robust cutting capabilities, the SENIX mower is an excellent choice. However, if you prefer the benefits of electric mowing, including quieter operation, less maintenance, and advanced technology, the WORX mower might be worth the higher investment. Assess your lawn care priorities, and select the mower that aligns best with your lifestyle.

