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Mercedes B Class vs Porsche Boxster comparison

Compare performance (238 HP vs 500 HP), boot space and price (33,100 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or Porsche Boxster?

Mercedes B Class vs Porsche Boxster: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • significantly cheaper
  • substantially more efficient
  • marginally lighter
  • substantially more trunk space
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Porsche Boxster

  • clearly more power
  • considerably quicker 0–100 km/h
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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:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes B Class is significantly cheaper – starting at 33,100 £ , while the Porsche Boxster costs 136,000 £ . That’s a price difference of around 102,899 £.

Fuel consumption also shows a difference: the Mercedes B Class uses 5.1 L/100km and is substantially more efficient than the Porsche Boxster with 12.7 L/100km. The difference is about 7.6 L/100km.

Boxster

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Porsche Boxster offers clearly more power – delivering 500 HP compared to 238 HP. That’s roughly 262 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Boxster is considerably quicker – completing the sprint in 3.4 s, while the Mercedes B Class takes 6.5 s. That’s about 3.1 s quicker.

There’s also a difference in torque: the Porsche Boxster delivers moderately more torque with 450 Nm compared to 400 Nm. That’s about 50 Nm more.

B Class

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Seats: Mercedes B Class offers more seats – 5 vs 2.

In terms of curb weight, Mercedes B Class is marginally lighter – 1,405 kg compared to 1,485 kg. The difference is around 80 kg.

Looking at boot space, the Mercedes B Class offers substantially more boot space – 455 L compared to 122 L. That’s a difference of about 333 L.

When it comes to payload, the Mercedes B Class carries substantially more – 550 kg compared to 270 kg. That’s a difference of about 280 kg.

Who wins the race in the data check?

The Mercedes B Class holds a decisive overall lead 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 £33,100
B Class

Mercedes B Class

  • Engine Type Petrol MHEV, Diesel
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 238 HP
  • Consumption L/100km 5.1 - 6.9 L/100km
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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
Porsche Boxster

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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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

Porsche Boxster

The Porsche Boxster epitomizes the essence of a pure, open-top driving experience with its mid-engine roadster design. Known for its agile handling and dynamic performance, the Boxster seamlessly blends luxury with thrilling precision on the road. Its unmistakable styling and superior engineering continue to captivate automotive enthusiasts who crave a visceral connection to the art of driving.

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Reviews Porsche Boxster

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

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Mercedes B Class
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The BMW 2 Series Active Tourer and the Mercedes B‑Class are the two leading compact MPVs for buyers who need practical space without the bulk of an SUV. The 2 Series Active Tourer leans toward a driver-focused, sharper feel, while the B‑Class prioritizes passenger comfort, flexible packaging and a …
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Mercedes B Class
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Mercedes B Class
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Mercedes B Class
Porsche Boxster

Costs and Consumption
Price
33,100 - 52,500 £
Price
136,000 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
12.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
288 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body
Body Type
MPV
Body Type
Roadster
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
1,405 - 1,565 kg
Curb weight
1,485 kg
Trunk capacity
445 - 455 L
Trunk capacity
122 L
Length
-
Length
4,418 mm
Width
1,796 mm
Width
1,822 mm
Height
-
Height
1,252 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
270 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
116 - 238 HP
Power HP
500 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
308 km/h
Torque
200 - 400 Nm
Torque
450 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
85 - 175 kW
Power kW
368 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
3,996 cm3

General
Model Year
2025
Model Year
2023
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
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.