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The senix 22 inch 201cc self propelled gas vs 21 inch 170cc self propelled comparison highlights two reliable options for medium lawns. Both models feature a 3-in-1 cutting system and self-propelled drive. The main difference lies in their engine power and cutting width. You get a wider deck and more torque with the 201cc engine, while the 170cc model offers a lighter build. This guide breaks down the specs to help you choose.
Engine Displacement
201cc
170cc
Cutting Width
22 inches
21 inches
Drive Type
Rear-wheel drive
Front-wheel drive
Weight
79 pounds
61.7 pounds
Max Cutting Height
4 inches
3.75 inches
Choose the first if
- You have a lawn larger than 1/3 acre and need extra torque for thick grass.
- You frequently mow on slopes or uneven terrain where rear-wheel traction is critical.
- You prefer a heavier, more stable mower that covers more ground per pass.
Choose the second if
- You want a lighter mower that is easier to lift and maneuver around obstacles.
- Your yard is relatively flat and under 1/3 acre in size.
- You prioritize easier storage due to the lower weight and compact footprint.
Verdict
The 22-inch 201cc model is the better choice for larger or rougher lawns where power and traction matter most. The 21-inch 170cc model suits smaller, flat yards where lighter weight and easier handling are priorities. Your decision depends on whether you value raw power or maneuverability.
SENIX 22-Inch vs 21-Inch Specs
Cutting width
Edge: SENIX 22-Inch 201cc Self-Propelled Gas Mower
The SENIX 22-Inch 201cc Self-Propelled Gas Mower features a 22-inch wide cutting deck. This wider blade covers more ground in a single pass compared to narrower models. The SENIX 21-Inch 170cc Self-Propelled Gas Mower has a 21-inch cutting width. Both decks are made of durable steel. The extra inch on the larger model helps you finish medium to large lawns faster. You will make fewer passes with the 22-inch version. The 21-inch model is still efficient for yards up to one-third acre. Choose the wider deck if you want to reduce total mowing time.
Engine power
Edge: SENIX 22-Inch 201cc Self-Propelled Gas Mower
Engine displacement directly impacts torque and overall cutting performance. The SENIX 22-Inch model is powered by a 201cc 4-cycle OHV engine. The SENIX 21-Inch model uses a smaller 170cc 4-cycle OHV gas engine. The 201cc unit delivers stronger, consistent performance for thicker grass. The 170cc engine produces 3.8 HP and 6.5 ft-lb of torque. Both are reliable gas engines designed for long life. The larger displacement in the 22-inch model provides more power for tough conditions. You get more raw power with the 201cc engine. This matters most when dealing with dense or wet grass.
Drive type
Edge: Tie
Both mowers are self-propelled, but they drive different wheels. The SENIX 22-Inch 201cc model uses a rear-wheel-drive system. Rear-wheel drive provides superior traction on slopes and uneven terrain. The SENIX 21-Inch 170cc model features a front-wheel-drive system. Front-wheel drive makes it easier to lift the front and pivot around obstacles like trees. Both systems reduce fatigue during mowing. The rear-wheel drive is generally better for hills. The front-wheel drive offers better maneuverability in tight spaces. Your choice depends on whether you prioritize hill climbing or tight turning.
Height adjustment
Edge: SENIX 22-Inch 201cc Self-Propelled Gas Mower
Both mowers offer six positions for cutting height. The SENIX 22-Inch model uses a single-lever adjustment. Its settings range from 1.25 inches to 4 inches. The SENIX 21-Inch model uses a dual-lever adjustment. Its settings range from 1.25 inches to 3.75 inches. The 22-inch model allows for a slightly higher maximum cut. This gives you more flexibility for different grass types and seasons. The single lever is quick to operate. The dual lever on the 21-inch model provides precise control. Both systems ensure you can achieve the perfect cut for your lawn needs.
Weight and size
Edge: SENIX 21-Inch 170cc Self-Propelled Gas Mower
The SENIX 22-Inch 201cc mower weighs 79 pounds. Its dimensions are 37 inches long, 23.5 inches wide, and 15.8 inches high. The SENIX 21-Inch 170cc mower is significantly lighter at 61.7 pounds. It measures 61 inches long, 22.8 inches wide, and 41.5 inches high. The lighter weight makes the 21-inch model easier to lift and transport. However, it is much longer when assembled. The 22-inch model is more compact in length but heavier. Consider storage space and how often you need to move the mower. The lighter unit is easier to handle for some users.
Choose the right SENIX mower for you
You have a medium to large lawn
Our pick: SENIX 22-Inch 201cc Self-Propelled Gas Mower
The 22-inch cutting deck covers more ground in a single pass. This wider blade helps you finish mowing faster and more efficiently. The 201cc engine delivers strong, consistent performance for tackling medium to large lawns with ease, reducing the number of passes you need to make.
You need better traction on slopes
Our pick: SENIX 22-Inch 201cc Self-Propelled Gas Mower
This model uses rear-wheel drive for superior traction. The large 11-inch rear wheels provide smooth maneuverability on slopes and uneven terrain. You get better stability when handling thicker grass or inclines compared to front-wheel drive systems, making it easier to control the mower on difficult ground.
You want a lighter, easier to lift mower
Our pick: SENIX 21-Inch 170cc Self-Propelled Gas Mower
Weighing only 61.7 pounds, this model is significantly lighter than the 22-inch version. The front-wheel drive design allows you to easily lift the front and pivot around trees and flower beds. It is best for relatively flat yards where you want less fatigue and easier handling.
SENIX 22-Inch 201cc Self-Propelled Gas Mower
Best for: medium to large lawns with slopes
- Cutting Width
- 22"
- Drive Type
- Self-propelled, rear-wheel drive
- Mowing Functions
- 3-in-1
- Motor Type
- 201cc 4-cycle OHV
- Height Adjustments
- 6 positions, 1.25" to 4"
- Power Type
- Gas
This SENIX model features a 201cc 4-cycle OHV engine and a 22-inch steel cutting deck. It uses rear-wheel drive self-propulsion with 11-inch rear wheels for traction on slopes. The unit offers a 3-in-1 cutting system and six height positions from 1.25 to 4 inches. Its 79-pound weight and 22-inch width make it suitable for medium to large lawns where coverage speed matters.
- 201cc OHV engine provides strong performance for medium to large lawns
- 22-inch steel cutting deck covers more ground than standard 20-inch mowers
- Rear-wheel drive with 11-inch rear wheels improves traction on uneven terrain
- Six height positions allow adjustment from 1.25 to 4 inches
- Heavier build at 79 pounds compared to lighter alternatives
- Limited to six height adjustment positions
- You need a wider 22-inch deck to finish mowing faster
- You have medium to large lawns with slopes or uneven terrain
- You prefer rear-wheel drive for better traction on thick grass
- You require a lighter mower for easy storage or transport
- You only have a small lawn where a 20-inch deck suffices
- You prefer electric power over gas engines
Verdict: SENIX 22-Inch 201cc Self-Propelled Gas Mower suits users with medium to large lawns who need a wider deck and robust traction. Its heavier weight and rear-wheel drive make it a solid choice for tackling slopes and thick grass efficiently.
SENIX 21-Inch 170cc Self-Propelled Gas Mower
Best for: small flat yards up to 1/3 acre
- Cutting Width
- 21 in
- Drive Type
- Self-propelled, FWD
- Mowing Functions
- 3-in-1 (mulch, bag, side discharge)
- Motor Type
- 170 cc 4-cycle OHV gas
- Height Adjustments
- 6 positions, 1.25-3.75 in
- Engine Displacement
- 170cc
This SENIX model features a 21-inch cutting width and a 170cc 4-cycle OHV gas engine. It delivers 3.8 HP and 6.5 ft-lb of torque for efficient mowing. The self-propelled front-wheel drive helps you handle up to 1/3-acre yards with less fatigue. You get 6 height positions ranging from 1.25 to 3.75 inches. The 3-in-1 steel deck supports mulching, bagging, and side discharge. It weighs 61.7 pounds and includes a 1.7-bushel bagger.
- 170cc OHV gas engine provides 3.8 HP and 6.5 ft-lb of torque
- Self-propelled FWD drive reduces effort on flat yards up to 1/3 acre
- 6-position height adjustment ranges from 1.25 to 3.75 inches
- 3-in-1 steel deck supports mulching, bagging, and side discharge
- 11-inch rear wheels offer excellent maneuverability on uneven surfaces
- 170cc engine displacement is lower than the 201cc option on this list
- 21-inch cutting width is narrower than the 22-inch alternative
- 61.7-pound weight is heavier than lighter electric or smaller gas models
- You need a self-propelled mower for yards up to 1/3 acre
- You want a 3-in-1 deck for mulching or bagging
- You prefer gas power with front-wheel drive for flat terrain
- You have a yard larger than 1/3 acre
- You require a 22-inch cutting width for wider swaths
- You need more than 170cc of engine power
Verdict: SENIX 21-Inch 170cc Self-Propelled Gas Mower suits homeowners with small to medium flat yards who value reliable gas power and versatile deck functions. It is a solid choice if you do not need the extra width or torque of the 22-inch 201cc model.
Specifications side by side
| Spec | SENIX 22-Inch 201cc Self-Propelled Gas Mower | SENIX 21-Inch 170cc Self-Propelled Gas Mower |
|---|---|---|
| Cutting Width | 22" | 21 in |
| Drive Type | Self-propelled, rear-wheel drive | Self-propelled, FWD |
| Mowing Functions | 3-in-1 | 3-in-1 (mulch, bag, side discharge) |
| Motor Type | 201cc 4-cycle OHV | 170 cc 4-cycle OHV gas |
| Height Adjustments | 6 positions, 1.25" to 4" | 6 positions, 1.25-3.75 in |
| Power Type | Gas | Gas |
| Engine Displacement | – | 170cc |
| Dimensions | 37 × 23.5 × 15.8 inches | 61 × 22.8 × 41.5 inches |
| Weight | 79 pounds | 61.7 pounds |
| Size | 22INCH-201CC | 21 Inch-170cc-6 Position |
| Color | Black & Blue | Blue |
| Model | HI6 | A025054-A |
Frequently asked questions
Which SENIX mower is better for slopes?
The SENIX 22-Inch 201cc model is better for slopes. It weighs 79 pounds, providing more stability on uneven ground. Its rear-wheel drive offers superior traction compared to lighter models. This extra weight and drive type help you maintain control when mowing on inclines or thick grass.
What is the weight difference between the two models?
The SENIX 22-Inch 201cc mower weighs 79 pounds. The SENIX 21-Inch 170cc mower weighs 61.7 pounds. The difference is 17.3 pounds. The heavier 22-inch model provides more traction and stability. The lighter 21-inch model is easier to maneuver and store in smaller spaces.
Does the 21-inch model have multiple height settings?
Yes, the SENIX 21-Inch 170cc model includes six height positions. The product data lists its size as 21 Inch-170cc-6 Position. This allows you to adjust the cutting height to suit different grass conditions. The 22-inch model data does not specify the number of height settings.
Which mower is easier to store?
The SENIX 21-Inch 170cc model is easier to store. It weighs 61.7 pounds and measures 22.8 inches wide. The 22-inch model weighs 79 pounds and measures 23.5 inches wide. The lighter and narrower dimensions of the 21-inch model make it more compact for garage or shed storage.
Can both models mulch and bag clippings?
Both models support 3-in-1 mowing functions. This typically includes mulching, bagging, and side discharge capabilities. The 21-inch model explicitly lists mulching, bagging, and side discharge. The 22-inch model lists 3-in-1 functionality. You can use either mower for versatile grass management and disposal options.
Which engine provides more power for thick grass?
The SENIX 22-Inch 201cc model provides more power. It features a 201cc engine compared to the 170cc engine in the 21-inch model. The larger displacement engine delivers higher torque. This makes the 22-inch model more effective at cutting through thick or tall grass efficiently.
What are the overall dimensions of the 22-inch mower?
The SENIX 22-Inch 201cc mower measures 37 inches in length, 23.5 inches in width, and 15.8 inches in height. It weighs 79 pounds. These dimensions make it a substantial unit. The larger footprint accommodates the wider cutting deck and heavier engine components for robust performance.
Is the 21-inch model suitable for small yards?
Yes, the SENIX 21-Inch 170cc model is suitable for small yards. It is designed for flat yards up to 1/3 acre. Its lighter weight of 61.7 pounds and 21-inch cutting deck make it ideal for smaller spaces. You get reliable gas power without the bulk of the larger 22-inch model.
