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Mercedes GLB vs Porsche 911 Coupe comparison

Compare performance (354 HP vs 711 HP), boot space and price (43,200 £ vs 125,800 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLB or Porsche 911 Coupe?

Mercedes GLB vs Porsche 911 Coupe: Key differences

Mercedes GLB

3.6 (4 Reviews)
rate
  • clearly cheaper
  • significantly more efficient
  • noticeably more trunk space
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Porsche 911 Coupe

  • significantly more power
  • substantially quicker 0–100 km/h
  • slightly lighter
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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

GLB

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 GLB is clearly cheaper – starting at 43,200 £ , while the Porsche 911 Coupe costs 125,800 £ . That’s a price difference of around 82,631 £.

Fuel consumption also shows a difference: the Mercedes GLB uses 5.7 L/100km and is significantly more efficient than the Porsche 911 Coupe with 10.3 L/100km. The difference is about 4.6 L/100km.

911 Coupe

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 Porsche 911 Coupe offers significantly more power – delivering 711 HP compared to 354 HP. That’s roughly 357 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche 911 Coupe is substantially quicker – completing the sprint in 2.5 s, while the Mercedes GLB takes 5.5 s. That’s about 3 s quicker.

There’s also a difference in torque: the Porsche 911 Coupe delivers visibly more torque with 800 Nm compared to 515 Nm. That’s about 285 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 911 Coupe is slightly lighter – 1,536 kg compared to 1,840 kg. The difference is around 304 kg.

Looking at boot space, the Mercedes GLB offers noticeably more boot space – 540 L compared to 373 L. That’s a difference of about 167 L.

When it comes to payload, the Mercedes GLB carries noticeably more – 505 kg compared to 310 kg. That’s a difference of about 195 kg.

Who wins the race in the data check?

The Mercedes GLB is decisively ahead 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 £43,200
GLB

Mercedes GLB

  • Engine Type Electric, Full Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 156 - 354 HP
  • Consumption L/100km 5.7 - 6.1 L/100km
  • Consumption kWh/100km 15.4 - 15.9 kWh/100km
  • Electric Range 431 - 631 km
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Frequently compared as well

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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 compact luxury SUV that blends smart packaging with a polished, composed driving experience. Its flexible interior and premium feel make it a sensible pick for buyers who want Mercedes comfort and practicality in a smaller footprint.

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Reviews Mercedes GLB

3.6 (4 Reviews)
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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 911 Coupe

The Porsche 911 Coupe remains the iconic sports car you buy when you want a thrilling weekend weapon that still behaves like a civilized companion during the weekdays. Its classic silhouette and razor‑sharp handling deliver a grin-inducing drive every time, while the polished interior and intuitive controls remind you this is a car built for drivers, not just headlines.

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Reviews Porsche 911 Coupe

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

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Porsche 911 Coupe

Costs and Consumption
Price
43,200 - 62,400 £
Price
125,800 - 301,000 £
Consumption L/100km
5.7 - 6.1 L/100km
Consumption L/100km
10.3 - 13.8 L/100km
Consumption kWh/100km
15.4 - 15.9 kWh/100km
Consumption kWh/100km
-
Electric Range
431 - 631 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 - 138 g/km
co2
233 - 312 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
-
Curb weight
1,840 - 2,280 kg
Curb weight
1,536 - 1,815 kg
Trunk capacity
540 L
Trunk capacity
373 L
Length
-
Length
-
Width
1,861 mm
Width
1,852 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
485 - 505 kg
Payload
228 - 310 kg

Engine and Performance
Engine Type
Electric, Full Hybrid
Engine Type
Petrol, Full Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
156 - 354 HP
Power HP
394 - 711 HP
Acceleration 0-100km/h
5.5 - 9.7 s
Acceleration 0-100km/h
2.5 - 4.5 s
Max Speed
-
Max Speed
-
Torque
280 - 515 Nm
Torque
450 - 800 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
115 - 260 kW
Power kW
290 - 523 kW
Engine capacity
1,499 cm3
Engine capacity
2,981 - 3,996 cm3

General
Model Year
2026
Model Year
2,024 - 2,026
CO2 Efficiency Class
A, D, E
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.