VS

Mercedes GLB vs Porsche 911 Convertible comparison

Compare performance (354 HP vs 711 HP), boot space and price (43,200 £ vs 138,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLB or Porsche 911 Convertible?

Mercedes GLB vs Porsche 911 Convertible: Key differences

Mercedes GLB

3.6 (4 Reviews)
rate
  • clearly cheaper
  • substantially more efficient
  • noticeably more trunk space
details

Porsche 911 Convertible

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

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:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Mercedes GLB is clearly cheaper – starting at 43,200 £ , while the Porsche 911 Convertible costs 138,000 £ . That’s a price difference of around 94,803 £.

Fuel consumption also shows a difference: the Mercedes GLB uses 5.7 L/100km and is substantially more efficient than the Porsche 911 Convertible with 10.5 L/100km. The difference is about 4.8 L/100km.

911 Convertible

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 911 Convertible offers considerably 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 Convertible is clearly quicker – completing the sprint in 2.6 s, while the Mercedes GLB takes 5.5 s. That’s about 2.9 s quicker.

There’s also a difference in torque: the Porsche 911 Convertible delivers clearly 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 4.

In terms of curb weight, Porsche 911 Convertible is slightly lighter – 1,572 kg compared to 1,840 kg. The difference is around 268 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 markedly more – 505 kg compared to 345 kg. That’s a difference of about 160 kg.

Who wins the race in the data check?

The Mercedes GLB 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 £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
details

Frequently compared as well

Mercedes EQB
Mercedes GLB
VS
The Mercedes EQB and Mercedes GLB target the same compact‑SUV buyers but take very different routes: the EQB is the all‑electric choice while the GLB relies on conventional petrol/diesel and mild‑hybrid engines. This quick comparison looks at driving character, interior practicality, range and …
Mercedes GLB
smart #5
VS
The Mercedes GLB is a sensible, slightly boxy premium compact SUV that delivers real-world space, family practicality and a composed long-distance ride, while the smart #5 is a punchy electric crossover that trades rear-seat room for sharp styling, low running costs and urban agility. If you …
Mercedes GLB
Porsche 911 Convertible

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.

details
19C0853_001
19C0853_003
19C0853_015
19C0853_069
19C0797_007

Reviews Mercedes GLB

3.6 (4 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 911 Convertible

The Porsche 911 Cabriolet transforms the iconic silhouette into an open‑air weapon, offering roof-down glamour and razor-sharp handling that still feels perfectly composed on normal roads. It’s the kind of car that serves daily duties with surprising ease while delivering intoxicating engine music and a grin factor that makes every trip feel like a small victory.

details
serpimg_JYmvXq

Reviews Porsche 911 Convertible

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

Frequently compared as well

BMW iX3
Mercedes GLB
VS
The BMW iX3 and Mercedes GLB go head-to-head as two very different takes on the premium compact SUV: the iX3 is BMW’s electric, efficiency-focused offering while the GLB is Mercedes’ practical, multi‑seat family SUV. This comparison will help you weigh the iX3’s EV range, refinement and tech …
Mercedes GLB
Peugeot 5008
VS
The Mercedes GLB and the Peugeot 5008 are compact SUVs aimed at buyers who need space and practicality, but they take very different approaches — the GLB leans toward a premium, tech‑focused experience while the 5008 emphasizes family‑friendly seating and value. If you want an upmarket cabin and …
Mercedes GLB
Volvo EX60
VS
Line up the pragmatic, boxy Mercedes GLB — a family-friendly compact SUV that prides itself on space and sensible engineering — against the sleek, tech-forward Volvo EX60 with its unmistakable Scandinavian design and safety-first instincts. It’s a clash of personalities: German practicality and …
Mercedes GLB
VW Tayron
VS
In the competitive compact SUV segment, the Mercedes GLB and VW Tayron each bring their unique strengths to the table. The GLB captivates with its luxurious interior and advanced technology features, making it a perfect blend of style and substance. Meanwhile, the VW Tayron impresses with its …
Mercedes CLA Shooting Brake
Mercedes GLB
VS
The Mercedes CLA Shooting Brake and the Mercedes GLB take two very different approaches to compact premium motoring: the CLA Shooting Brake pairs coupe-like styling with an estate’s practicality, while the GLB is a boxy, family-focused compact SUV that emphasizes space and versatility. If you …
Mercedes GLB
Skoda Enyaq
VS
Mercedes GLB and Skoda Enyaq go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Mercedes GLB or the Skoda …
Mercedes GLB
Tesla Model Y
VS
The Mercedes GLB and Tesla Model Y both aim at compact-SUV buyers but take very different approaches: the GLB focuses on practical space, traditional refinement and optional third-row seating, while the Model Y offers an all-electric drivetrain, strong range and Tesla’s tech-focused experience. …
BMW iX2
Mercedes GLB
VS
BMW iX2 and Mercedes GLB go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the BMW iX2 or the Mercedes GLB …
Mercedes GLB
Porsche 911 Convertible

Costs and Consumption
Price
43,200 - 62,400 £
Price
138,000 - 244,500 £
Consumption L/100km
5.7 - 6.1 L/100km
Consumption L/100km
10.5 - 13.7 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
237 - 310 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Convertible
Seats
5
Seats
2 - 4
Doors
-
Doors
-
Curb weight
1,840 - 2,280 kg
Curb weight
1,572 - 1,900 kg
Trunk capacity
540 L
Trunk capacity
163 - 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
195 - 345 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
2.6 - 4.7 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.