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Mercedes GLB vs Porsche Boxster comparison

Compare performance (354 HP vs 500 HP), boot space and price (50,600 £ vs 136,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLB or Porsche Boxster?

Mercedes GLB vs Porsche Boxster: Key differences

Mercedes GLB

3.2 (3 Reviews)
rate
  • considerably cheaper
  • significantly more trunk space

Porsche Boxster

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

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

GLB

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 GLB is considerably cheaper – starting at 50,600 £ , while the Porsche Boxster costs 136,000 £ . That’s a price difference of around 85,416 £.

Boxster

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Porsche Boxster offers clearly more power – delivering 500 HP compared to 354 HP. That’s roughly 146 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Boxster is significantly quicker – completing the sprint in 3.4 s, while the Mercedes GLB takes 5.5 s. That’s about 2.1 s quicker.

There’s also a difference in torque: the Mercedes GLB delivers somewhat more torque with 515 Nm compared to 450 Nm. That’s about 65 Nm more.

GLB

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 GLB offers more seats – 5 vs 2.

In terms of curb weight, Porsche Boxster is considerably lighter – 1,485 kg compared to 2,200 kg. The difference is around 715 kg.

Looking at boot space, the Mercedes GLB offers significantly more boot space – 540 L compared to 122 L. That’s a difference of about 418 L.

When it comes to payload, the Mercedes GLB carries clearly more – 500 kg compared to 270 kg. That’s a difference of about 230 kg.

Who wins the race in the data check?

The Mercedes GLB is far ahead overall 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 £50,600
GLB

Mercedes GLB

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 272 - 354 HP
  • Consumption kWh/100km : 15.8 - 15.9 kWh/100km
  • Electric Range : 614 - 631 km
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Porsche Boxster

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes GLB

The Mercedes GLB is a practical compact SUV that mixes boxy, family-friendly space with premium German polish, making it an appealing choice for buyers who want usefulness without pretension. It drives with a confident, composed feel and somehow manages to look both rugged and refined — the grown-up SUV that still likes to have fun.

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Reviews Mercedes GLB

3.2 (3 Reviews)
rate
Hans
19 Feb 2026, 02:39:00

Great car — very satisfied with the GLB 250 4MATIC.

How do you mainly use this car? (optional): Leisure / Weekend driver
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

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Porsche Boxster

Costs and Consumption
Price
50,600 - 62,400 £
Price
136,000 £
Consumption L/100km
-
Consumption L/100km
12.7 L/100km
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Consumption kWh/100km
-
Electric Range
614 - 631 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
288 g/km
Fuel tank capacity
-
Fuel tank capacity
54 L

Dimensions and Body
Body Type
SUV
Body Type
Roadster
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
2,200 - 2,280 kg
Curb weight
1,485 kg
Trunk capacity
540 L
Trunk capacity
122 L
Length
-
Length
4,418 mm
Width
1,861 mm
Width
1,822 mm
Height
-
Height
1,252 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
500 kg
Payload
270 kg

Engine and Performance
Engine Type
Electric
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
272 - 354 HP
Power HP
500 HP
Acceleration 0-100km/h
5.5 - 7.4 s
Acceleration 0-100km/h
3.4 s
Max Speed
-
Max Speed
308 km/h
Torque
335 - 515 Nm
Torque
450 Nm
Number of Cylinders
-
Number of Cylinders
6
Power kW
200 - 260 kW
Power kW
368 kW
Engine capacity
-
Engine capacity
3,996 cm3

General
Model Year
2,026
Model Year
2,023
CO2 Efficiency Class
A
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
What drive types are available for the Mercedes GLB?

Available configurations include Rear-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.