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Scored using Immersion Blenders Methodology v3.0
Immersion Blenders Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Immersion Blenders Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Immersion Blenders Methodology v3.0

Bosch MSM4W421 Review | 40 Data compared

Avg. price:~£60Power:800 WCordless:noWeight:1.3 kgStepless variable speed:yesDishwasher-safe parts:yes

Bosch MSM4W421 Review: Compare 40 technical specifications to see how this product ranks in the Immersion Blenders category and whether it is worth buying.

Bosch MSM4W421
7.4/10

Overall score

Score
7.4/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, ratings from across the web and best-of lists.
How we count it
Parts: Technical score 65%, User score 25%, List score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 60% of models
Score components

65%

7.4

Technical score

25%

7.4

User score

10%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

â–²Better than 60% of immersion blenders
7.9

Value for money

Value for money
7.9/ 10
✕
What it is
An indicator that combines the immersion blender's overall rating with its price.
When it matters
When you are looking for an immersion blender with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 55% of models
Score components

70%

7.4

Overall score

30%

9.1

Price

â–²Better than 55%
7.4

Technical score

Technical score
7.4/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 65% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 68% of models
Score components

45%

7.0

Performance

20%

7.0

Accessories

15%

9.1

Design

10%

6.8

Usability

10%

8.0

Dimensions

â–²Better than 68%
7.4

User score

User score
7.4/ 10
✕
What it is
How happy buyers are with this model, based on ratings from across the web.
How we count it
Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 8.0, the mark of a weaker rated model in this category.
Share: User score counts 25% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 68% of models

7.4

Mark 8.4 is below the typical mark 8.5 of this category, so it cannot lift the score above the technical score

70%

9.2

Rating

30%

6.7

Popularity

â–¼Worse than 68%
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 10% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
  • bosch-msm4w421
  • bosch-msm4w421
bosch-msm4w421
bosch-msm4w421
Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of immersion blender Bosch MSM4W421

Technical score
Technical score
7.4/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 65% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 68% of models
Score components:

45%

7.0

Performance

20%

7.0

Accessories

15%

9.1

Design

10%

6.8

Usability

10%

8.0

Dimensions

7.4
Value for money
Value for money
7.9/ 10
✕
What it is
An indicator that combines the immersion blender's overall rating with its price.
When it matters
When you are looking for an immersion blender with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 55% of models
Score components:

70%

7.4

Overall score

30%

9.1

Price

7.9
Power
800 W
Market range: <200 W – >1.2k W
This immersion blender delivers 800 W of motor power, which is higher than the rated wattage of 57.5% of immersion blenders and equal to that of 5.7% of immersion blenders.
Number of speeds
?
Stepless variable speed
yes
This immersion blender features stepless variable speed control.
Turbo mode
no
This immersion blender does not support turbo mode.
Maximum RPM
11,200 RPM
Market range: <10k RPM – >20k RPM
This immersion blender spins up to 11,200 RPM, which is slower than the top blade speed of 89.7% of immersion blenders and equal to that of 1.7% of immersion blenders.
Show more
Commercial use
no
This immersion blender not designed for commercial use.
Dishwasher-safe parts
yes
This immersion blender has dishwasher-safe parts.
Safety lock
yes
This immersion blender features a safety lock.
Cordless
no
This immersion blender does not support cordless operation.
Battery type
-
Show more
Number of accessories
3
Market range: <1 – >6
This immersion blender comes with 3 attachments, which is more versatile than 52.6% of immersion blenders and equal to that of 30.3% of immersion blenders.
Chopper included
yes
This immersion blender includes the chopper attachment.
Chopper capacity
500 ml
Market range: <350 ml – >700 ml
This immersion blender provides a chopper capacity of 500 ml, which is more spacious than the mini-chopper of 14.1% of immersion blenders and equal to that of 59.2% of immersion blenders.
Measuring cup/glass included
yes
This immersion blender includes the measuring cup.
Measuring cup/glass capacity
600 ml
Market range: <600 ml – >800 ml
This immersion blender includes a measuring beaker of 600 ml, which is smaller than the cup of 53.2% of immersion blenders and equal to that of 38.2% of immersion blenders.
Show more
Shaft material
Stainless steel
Blade material
Stainless steel
Body material
Plastic
Detachable shaft
yes
This immersion blender supports a detachable shaft.
No-splash design
yes
This immersion blender supports a no-splash design.
Show more
Power cord length
1.4 m
Market range: <1 m – >2.5 m
This immersion blender has a power cord length of 1.4 m, which is longer reach than 54.1% of immersion blenders and equal to that of 9.4% of immersion blenders.
Weight
1.3 kg
Market range: <0.5 kg – >3 kg
This immersion blender weighs 1.3 kg, which is heavier in hand than 60.3% of immersion blenders and equal to that of 3.2% of immersion blenders.
Height
38.5 cm
Market range: <28 cm – >48 cm
This immersion blender stands 38.5 cm in height, which is more compact than 65.9% of immersion blenders and equal to that of 2.5% of immersion blenders.
Width/Depth
?

Bosch MSM4W421 vs the average immersion blender

246810TotalPerformanceUsabilityAccessoriesDesignDimensions
  • Features stepless variable speed control
    This immersion blender features stepless variable speed control while the average immersion blender does not.
  • Includes the chopper attachment
    This immersion blender includes the chopper attachment while the average immersion blender does not.
  • Features a safety lock
    This immersion blender features a safety lock while the average immersion blender does not.
  • 1 more blade points
    This immersion blender draws food inwards from multiple angles for faster, more uniform pureeing inside deep cooking pots than the average immersion blender (4 vs 3).
    4 vs 3
  • 1 more accessories
    This immersion blender handles whisking, chopping, and mashing right out of the box without separate appliance purchases compared to the average immersion blender (3 vs 2).
    3 vs 2
  • 100 W more motor power
    This immersion blender purees dense root vegetables and fibrous soups directly in hot pans with greater torque and less stalling than the average immersion blender (800 W vs 700 W).
    800 W vs 700 W
  • 0.2 m longer power cord
    This immersion blender reaches easily from distant wall sockets straight to your cooktop without pulling taut compared to the average immersion blender (1.4 m vs 1.2 m).
    1.4 m vs 1.2 m
  • 1.5 cm shorter wand profile
    This immersion blender fits neatly into kitchen drawers and shallow cutlery organizers without disassembling compared to the average immersion blender (38.5 cm vs 40 cm).
    38.5 cm vs 40 cm
  • 2.6% better value for money
    Bosch MSM4W421 has better value for money than the average immersion blender (7.93 vs 7.7).
    7.93 vs 7.73
  • Features stepless variable speed control
    This immersion blender features stepless variable speed control while the average immersion blender does not.
  • 1 more blade points
    This immersion blender draws food inwards from multiple angles for faster, more uniform pureeing inside deep cooking pots than the average immersion blender (4 vs 3).
    4 vs 3
  • 100 W more motor power
    This immersion blender purees dense root vegetables and fibrous soups directly in hot pans with greater torque and less stalling than the average immersion blender (800 W vs 700 W).
    800 W vs 700 W
  • Features a safety lock
    This immersion blender features a safety lock while the average immersion blender does not.
  • Includes the chopper attachment
    This immersion blender includes the chopper attachment while the average immersion blender does not.
  • 1 more accessories
    This immersion blender handles whisking, chopping, and mashing right out of the box without separate appliance purchases compared to the average immersion blender (3 vs 2).
    3 vs 2
  • 0.2 m longer power cord
    This immersion blender reaches easily from distant wall sockets straight to your cooktop without pulling taut compared to the average immersion blender (1.4 m vs 1.2 m).
    1.4 m vs 1.2 m
  • 1.5 cm shorter wand profile
    This immersion blender fits neatly into kitchen drawers and shallow cutlery organizers without disassembling compared to the average immersion blender (38.5 cm vs 40 cm).
    38.5 cm vs 40 cm
  • 3,300 RPM lower blade speed
    This immersion blender operates at a lower top RPM, requiring more blending passes through the pot to eliminate graininess compared to the average immersion blender (11,200 RPM vs 14,500 RPM).
    11,200 RPM vs 14,500 RPM
  • Does not support turbo mode
    This immersion blender does not support turbo mode while the average immersion blender does.
  • 100 ml smaller beaker volume
    This immersion blender provides a smaller blending cup that fills quickly when whipping liquids or multiple fruit servings compared to the average immersion blender (600 ml vs 700 ml).
    600 ml vs 700 ml
  • 19.4% heavier
    This immersion blender is heavier to hold continuously, causing more arm strain when pureeing large stockpots compared to the average immersion blender (1.3 kg vs 1.1 kg).
    1.3 kg vs 1.089 kg
  • 6.3% lower user score
    User score
    7.4/ 10
    ✕
    What it is
    How happy buyers are with this model, based on ratings from across the web.
    How we count it
    Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 8.0, the mark of a weaker rated model in this category.
    Share: User score counts 25% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–¼ Worse than 68% of models

    7.4

    Mark 8.4 is below the typical mark 8.5 of this category, so it cannot lift the score above the technical score

    70%

    9.2

    Rating

    30%

    6.7

    Popularity

    7.4 vs 7.9
  • 33.3% more expensive
    Bosch MSM4W421 is more expensive than the average immersion blender (£60 vs £45).
    £60 vs £45
  • 6.3% lower user score
    User score
    7.4/ 10
    ✕
    What it is
    How happy buyers are with this model, based on ratings from across the web.
    How we count it
    Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 8.0, the mark of a weaker rated model in this category.
    Share: User score counts 25% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–¼ Worse than 68% of models

    7.4

    Mark 8.4 is below the typical mark 8.5 of this category, so it cannot lift the score above the technical score

    70%

    9.2

    Rating

    30%

    6.7

    Popularity

    7.4 vs 7.9
  • 33.3% more expensive
    Bosch MSM4W421 is more expensive than the average immersion blender (£60 vs £45).
    £60 vs £45
  • 3,300 RPM lower blade speed
    This immersion blender operates at a lower top RPM, requiring more blending passes through the pot to eliminate graininess compared to the average immersion blender (11,200 RPM vs 14,500 RPM).
    11,200 RPM vs 14,500 RPM
  • Does not support turbo mode
    This immersion blender does not support turbo mode while the average immersion blender does.
  • 100 ml smaller beaker volume
    This immersion blender provides a smaller blending cup that fills quickly when whipping liquids or multiple fruit servings compared to the average immersion blender (600 ml vs 700 ml).
    600 ml vs 700 ml
  • 19.4% heavier
    This immersion blender is heavier to hold continuously, causing more arm strain when pureeing large stockpots compared to the average immersion blender (1.3 kg vs 1.1 kg).
    1.3 kg vs 1.089 kg

Third-party reviews

What customers like about Bosch MSM4W421

  • Intuitive one-handed speed control adjusted by grip pressure
  • Powerful 800W motor handles tough ingredients efficiently
  • QuattroBlade 4-blade stainless steel system ensures smooth blending
  • Anti-splash bell design minimizes kitchen mess
  • Ergonomic handle with non-slip soft-touch coating is comfortable to hold
  • Durable, wear-resistant ceramic gear connection between motor and wand
  • Comes with a versatile accessory kit including a chopper, whisk, and beaker
  • Most non-motor parts are dishwasher safe for easy cleaning

What customers don't like about Bosch MSM4W421

  • White plastic outer casing design can look dated to some users
  • Safety lock button must be pressed, which can feel less fluid during quick tasks
  • Only select component attachments are completely dishwasher safe
  • No detailed manual speed dial for users who prefer strict fixed increments over dynamic pressure control

Verdict

The Bosch ErgoMaster Series 4 MSM4W421 is a powerful 800-watt immersion blender featuring an intuitive, stepless dynamic speed control lever and a durable stainless steel blending foot equipped with a 4-blade QuattroBlade system. Its standout characteristics include an innovative, wear-resistant ceramic connection between the motor and the foot, an AntiSplash design to minimize messes, and an ergonomic soft-touch grip. The device comes accompanied by a versatile accessory kit consisting of a 500 ml chopper, a measuring beaker, and a whisk attachment. Main pros include its robust blending performance on tough ingredients, comfortable one-handed operation, and dishwasher-safe components, though some users note that the included whisk attachment is relatively small.

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