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Mercedes B Class vs Polestar 3 comparison

Compare performance (238 HP vs 680 HP), boot space and price (33,100 £ vs 67,600 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Polestar 3?

Mercedes B Class vs Polestar 3: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • clearly cheaper
  • clearly lighter
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Polestar 3

4.9 (1 Reviews)
rate
  • substantially more power
  • substantially quicker 0–100 km/h
  • barely more trunk space
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All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

Here’s where it gets real: The technical differences in detail

B Class

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

Mercedes B Class is clearly cheaper – starting at 33,100 £ , while the Polestar 3 costs 67,600 £ . That’s a price difference of around 34,499 £.

3

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Polestar 3 offers substantially more power – delivering 680 HP compared to 238 HP. That’s roughly 442 HP more horsepower.

When accelerating from 0 to 100 km/h, the Polestar 3 is substantially quicker – completing the sprint in 3.9 s, while the Mercedes B Class takes 6.5 s. That’s about 2.6 s quicker.

There’s also a difference in torque: the Polestar 3 delivers substantially more torque with 870 Nm compared to 400 Nm. That’s about 470 Nm more.

B Class

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes B Class is clearly lighter – 1,405 kg compared to 2,315 kg. The difference is around 910 kg.

Looking at boot space, the Polestar 3 offers barely more boot space – 484 L compared to 455 L. That’s a difference of about 29 L.

When it comes to payload, the Polestar 3 carries moderately more – 645 kg compared to 550 kg. That’s a difference of about 95 kg.

Who wins the race in the data check?

The Polestar 3 stands well ahead of its rival in the objective data comparison.
This result only shows which model scores more points on paper – not which of the two cars feels right for you.

from £67,600
3

Polestar 3

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 333 - 680 HP
  • Consumption kWh/100km 17.7 - 20.5 kWh/100km
  • Electric Range 601 - 647 km
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Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class and Mercedes GLA target buyers who want Mercedes practicality with premium touches, but they take different paths: the B‑Class is a spacious, hatchback-style people carrier while the GLA is a compact crossover with a higher ride height and sportier stance. This comparison looks …
Mercedes A Class
Mercedes B Class
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Mercedes B Class
Polestar 3

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes B Class

The Mercedes B-Class is a smart, grown-up compact people carrier that dresses everyday practicality in a near‑premium polish, perfect for buyers who want comfort and a classy badge without the theatrics. It won’t set your pulse racing on a back road, but it will make school runs, commutes and grocery hauls feel pleasantly civilized — a reliable, slightly posh companion for real life.

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18C0947_044

Reviews Mercedes B Class

4.9 (5 Reviews)
rate
Peter
5 Mar 2026, 05:51:19

My wife and I have been driving a Mercedes W247 200d for seven years now, with 93,000 km on the clock. The car is very comfortable even on long trips and economical. At the last service the pads of the electric parking brake were replaced; otherwise no repairs. We love this car.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

Polestar 3

Polestar 3 arrives as a Scandinavian-styled electric SUV that marries minimalist design with a statuesque presence, looking smarter than most in the car park. Inside, the cabin feels airy and thoughtful, with tech and driving manners that lean toward composed comfort rather than outright drama — perfect for buyers who want electric prestige without shouting about it.

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661750_20221012_Polestar_3

Reviews Polestar 3

4.9 (1 Reviews)
rate

No reviews yet. Share your experience and help others decide.

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Mercedes B Class
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ZEEKR 7X
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Mercedes B Class
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Mercedes B Class
Polestar 3

Costs and Consumption
Price
33,100 - 52,500 £
Price
67,600 - 91,600 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
17.7 - 20.5 kWh/100km
Electric Range
-
Electric Range
601 - 647 km
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,405 - 1,565 kg
Curb weight
2,315 - 2,525 kg
Trunk capacity
445 - 455 L
Trunk capacity
484 L
Length
-
Length
-
Width
1,796 mm
Width
1,935 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
605 - 645 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 238 HP
Power HP
333 - 680 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
3.9 - 6.5 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
480 - 870 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
85 - 175 kW
Power kW
245 - 500 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
-

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
Polestar
What drivetrain options does the Mercedes B Class have?

Available configurations include Front-Wheel Drive or All-Wheel Drive.

DriveDuel uses data analysis and artificial intelligence to evaluate vehicle data and create content. Content is regularly reviewed and improved. The displayed prices are estimates based on German list prices, adjusted to the respective country’s VAT. Country-specific registration taxes are not included. This information is not legally binding.