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This comparison of ryobi 40v hp brushless 20 vs olm1833b lawnmower battery 18v helps you pick the right tool for your yard. Both units are cordless electric mowers from RYOBI, meaning you avoid gas maintenance and fumes. The main difference lies in their power systems and cutting capabilities. One model offers higher voltage and self-propulsion, while the other provides a specific mulching function with a larger deck size. You need to weigh voltage against deck width to decide which fits your space and needs.
Voltage
40V
18V
Cutting Width
20 inches
33 cm
Drive Type
Self-Propelled
Not listed
Motor Type
Brushless
Not listed
Mowing Functions
Not listed
Mulching
Battery Capacity
Not listed
4.0 Ah
Choose the first if
- You want a self-propelled mower to reduce physical effort.
- You prefer a brushless motor for potentially longer runtime and durability.
- You are already invested in the RYOBI 40V HP battery platform.
Choose the second if
- You specifically need a mulching function for grass management.
- You prefer a wider 33 cm cutting deck for faster coverage.
- You are already using the RYOBI 18V ONE+ battery system.
Verdict
Choose the 40V HP Brushless model if you prioritize self-propulsion and motor efficiency. Select the 18V OLM1833B if you need a wider cutting deck and dedicated mulching capabilities. Your existing battery inventory should also guide this decision.
Specs: 40V Brushless vs 18V Mulching
Voltage and Power
Edge: RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower
The RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower operates on a 40-volt system, while the RYOBI 18V 33cm Mulching Lawnmower uses an 18-volt platform. Higher voltage generally correlates with increased motor torque and sustained power output under load. The 40-volt unit is designed for heavier duty tasks, offering more robust performance for thick or wet grass. The 18-volt model relies on a 4.0 Ah battery capacity, which provides a specific runtime profile suitable for smaller yards. You should consider your typical grass conditions when weighing this power difference. The 40V system offers a clear advantage in raw power delivery.
Cutting Width
Edge: RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower
Cutting width determines how much grass you can mow in a single pass. The 40V HP Brushless model features a 20-inch cutting deck. In contrast, the 18V Mulching Lawnmower has a 33 cm cutting width, which converts to approximately 13 inches. A wider deck allows you to cover more ground faster, reducing the time required for larger lawns. The 20-inch width is significantly broader than the 13-inch option. This difference is substantial for efficiency. If you have a larger area to maintain, the wider deck on the 40V mower is the superior choice for speed.
Drive Type
Edge: RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower
Drive type affects how the mower moves across your lawn. The RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower includes a self-propelled drive system. This means the wheels are powered by the motor, assisting you as you push the unit. The RYOBI 18V 33cm Mulching Lawnmower does not list a self-propelled feature in its specifications. It is likely a push model, requiring you to provide all the forward momentum. Self-propulsion reduces physical effort, especially on inclines or in tall grass. This makes the 40V model easier to maneuver for extended periods.
Mowing Functions
Edge: RYOBI 18V 33cm Mulching Lawnmower
Mowing functions define how the mower handles grass clippings. The RYOBI 18V 33cm Mulching Lawnmower is explicitly listed with mulching capabilities. This function chops clippings finely and returns them to the lawn as natural fertilizer. The specifications for the 40V HP Brushless model do not explicitly detail its mulching, bagging, or side-discharge options. While many modern mowers offer mulching, you must verify the specific configuration for the 40V unit. For users who prioritize returning nutrients to the soil without collecting clippings, the confirmed mulching function on the 18V model is a distinct benefit.
Motor Type
Edge: RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower
Motor type influences efficiency and maintenance needs. The 40V HP Brushless model utilizes a brushless motor. Brushless motors are generally more efficient, generate less heat, and have a longer lifespan than brushed motors because they lack carbon brushes that wear out. The specifications for the 18V model do not specify the motor type. Assuming it may use a standard brushed motor or a less specified electric drive, the brushless technology in the 40V unit offers better energy management and durability. This is a significant technical advantage for long-term reliability and consistent power delivery.
Which mower fits your yard best
Users with larger lawns needing ease of use
Our pick: RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower
The 40V HP Brushless model features self-propelled drive, reducing physical effort on big areas. Its 20-inch cutting width covers more ground per pass than the 18V option. The brushless motor offers efficient power delivery for extended runtime. This setup helps you finish larger yards faster without pushing the machine manually.
Those with small yards focusing on clean clippings
Our pick: RYOBI 18V 33cm Mulching Lawnmower
The 18V ONE+ model is designed for mulching, returning nutrients to your soil. At 19.2 pounds, it is lighter and easier to maneuver in tight spaces. The 33 cm cutting width suits smaller lawns. Its height adjustments range from 25 to 65 mm, allowing precise control for healthy grass growth in compact areas.
Budget-conscious buyers with existing 18V tools
Our pick: RYOBI 18V 33cm Mulching Lawnmower
If you already own RYOBI 18V batteries, this mower uses a 4.0 Ah pack from the same platform. You avoid buying new power systems. The 18-volt system is sufficient for moderate tasks. This compatibility saves money and simplifies storage, making it a practical choice for light to medium mowing duties.
RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower
Best for: Small lawns needing self-propelled ease
- Cutting Width
- 20"
- Drive Type
- self-propelled
- Voltage
- 40V
- Motor Type
- brushless
- Power Type
- Cordless
This RYOBI walk-behind mower uses a 40V brushless motor and self-propelled drive. Its 20-inch cutting width handles moderate lawn sizes efficiently. The brushless motor offers durability and consistent power. Self-propulsion reduces effort on uneven ground. It suits homeowners seeking a reliable cordless option for small to medium yards.
- 40V HP brushless motor for efficient power delivery
- Self-propelled drive reduces physical effort
- 20-inch cutting width for manageable coverage
- Cordless battery operation for mobility
- 20-inch cutting width is narrower than some competitors
- Self-propelled system adds weight compared to push models
- You want a self-propelled mower for easier pushing
- You prefer cordless power for quiet operation
- You have a small to medium lawn
- You need a wide cutting deck for large acreage
- You prefer a manual push mower for light exercise
- You require a gas-powered engine for heavy duty
Verdict: RYOBI 40V HP Brushless 20" Mower fits users who value self-propelled ease and cordless convenience for small yards.
RYOBI 18V 33cm Mulching Lawnmower
Best for: small lawns needing mulching
- Cutting Width
- 33 cm
- Voltage
- 18V
- Battery Capacity
- 4.0 Ah
- Mowing Functions
- Mulching
- Height Adjustments
- 25-65mm
- Dimensions
- 15.4 × 28 × 15 inches
This Ryobi 18V ONE+ lawnmower offers a 33 cm cutting width and mulching function. It uses a 4.0 Ah battery for power. The unit weighs 19.2 pounds and measures 28 inches wide. It adjusts cutting height from 25 to 65 mm. This model suits users with smaller yards who prefer mulching. It is a lighter option compared to higher voltage alternatives.
- 18V battery system
- 33 cm cutting width
- 4.0 Ah battery capacity
- Mulching function
- 19.2 pounds weight
- Lower 18V voltage compared to 40V competitors
- Smaller 33 cm cutting width
- Mulching-only function limits versatility
- You have a small lawn area
- You prefer a lighter mower for easy storage
- You want to mulch grass clippings into the soil
- You need a wider cutting path for large yards
- You require multiple mowing functions like bagging
- You want higher voltage for tougher grass conditions
Verdict: Ryobi 18V 33cm Mulching Lawnmower fits small yard owners who value lightweight handling and mulching. It is not ideal for large properties or those needing versatile mowing options.
Specifications side by side
| Spec | RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower | RYOBI 18V 33cm Mulching Lawnmower |
|---|---|---|
| Cutting Width | 20" | 33 cm |
| Drive Type | self-propelled | – |
| Voltage | 40V | 18V |
| Battery Capacity | – | 4.0 Ah |
| Mowing Functions | – | Mulching |
| Motor Type | brushless | – |
| Height Adjustments | – | 25-65mm |
| Power Type | Cordless | – |
| Dimensions | – | 15.4 × 28 × 15 inches |
| Weight | – | 19.2 pounds |
| Color | yellow | black/green |
| Model | #RY401180VNM | 5133004306 |
| Size | – | 33 cm cutting width |
Frequently asked questions
Is the 40V model self-propelled?
Yes, the RYOBI 40V HP Brushless 20-Inch Self-Propelled Mower features a self-propelled drive system. This mechanism reduces the physical effort required to push the mower across your lawn. The 18V model is not described as self-propelled in the provided data, so you would need to push it manually.
What is the cutting width difference?
The 40V model offers a 20-inch cutting width. The 18V model has a 33 cm cutting width, which converts to approximately 13 inches. The 40V mower covers more ground per pass, making it more efficient for larger areas compared to the narrower 18V option.
Does the 18V mower mulch?
Yes, the RYOBI 18V 33cm Mulching Lawnmower is designed specifically for mulching functions. This allows you to chop grass clippings and return them to the lawn as nutrient-rich organic matter. The 40V model’s mowing functions are not specified in the provided data.
Which motor type is more efficient?
The 40V model uses a brushless motor. Brushless motors generally offer better efficiency, longer lifespan, and less maintenance than brushed motors because they lack carbon brushes that wear out over time. The motor type for the 18V model is not listed in the available specifications.
How much does the 18V mower weigh?
The RYOBI 18V 33cm Mulching Lawnmower weighs 19.2 pounds. This lightweight design aids in handling and maneuverability, especially for users with smaller lawns. The weight of the 40V self-propelled model is not provided in the current data set.
Can I use 18V batteries in the 40V mower?
No, the two mowers operate on different voltage platforms. The 40V model requires a 40-volt battery system, while the 18V model uses an 18-volt battery. The 18V model specifies a 4.0 Ah battery capacity, but these batteries are not compatible with the higher-voltage 40V unit.
Which is better for small lawns?
The 18V mulching mower is ideal for small lawns. Its 33 cm cutting width and lightweight 19.2-pound frame make it easy to handle in tight spaces. The 40V model is better suited for users who need self-propelled ease and a wider 20-inch cut for larger areas.
