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Mercedes GLC vs Porsche 911 Convertible comparison

Compare performance (472 HP vs 711 HP), boot space and price (50,300 £ vs 138,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLC or Porsche 911 Convertible?

Mercedes GLC vs Porsche 911 Convertible: Key differences

Mercedes GLC

4.4 (13 Reviews)
rate
  • clearly cheaper
  • considerably more efficient
  • noticeably more trunk space
details

Porsche 911 Convertible

  • visibly more power
  • clearly quicker 0–100 km/h
  • noticeably 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

GLC

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Mercedes GLC is clearly cheaper – starting at 50,300 £ , while the Porsche 911 Convertible costs 138,000 £ . That’s a price difference of around 87,673 £.

Fuel consumption also shows a difference: the Mercedes GLC uses 1.6 L/100km and is considerably more efficient than the Porsche 911 Convertible with 10.5 L/100km. The difference is about 8.9 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 visibly more power – delivering 711 HP compared to 472 HP. That’s roughly 239 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 GLC takes 4.2 s. That’s about 1.6 s quicker.

There’s also a difference in torque: the Porsche 911 Convertible delivers barely more torque with 800 Nm compared to 750 Nm. That’s about 50 Nm more.

GLC

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 GLC offers more seats – 5 vs 4.

In terms of curb weight, Porsche 911 Convertible is noticeably lighter – 1,572 kg compared to 1,985 kg. The difference is around 413 kg.

Looking at boot space, the Mercedes GLC offers noticeably more boot space – 620 L compared to 373 L. That’s a difference of about 247 L.

When it comes to payload, the Mercedes GLC carries clearly more – 575 kg compared to 345 kg. That’s a difference of about 230 kg.

Who wins the race in the data check?

The Mercedes GLC is clearly superior 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 £50,300
GLC

Mercedes GLC

  • Engine Type Diesel MHEV, Plugin Hybrid, Petrol MHEV
  • Transmission Automatic
  • Drive Type All-Wheel Drive
  • Power HP 186 - 472 HP
  • Consumption L/100km 1.6 - 9.4 L/100km
  • Electric Range 122 - 128 km
details

Frequently compared as well

Mercedes GLC
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes GLC

The Mercedes GLC blends quiet refinement with premium materials to create a comfortable, modern cabin that feels more upscale than its size might suggest. It delivers composed handling and confident on-road manners while offering practical versatility and a strong suite of driver assistance and infotainment features.

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Reviews Mercedes GLC

4.4 (13 Reviews)
rate
Zede
10 May 2026, 20:12:35

Too expensive! To justify it with technology that's equal or inferior.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Marek
2 Jan 2026, 18:32:30

There’s something about a Mercedes — you have to take it for a spin to feel it and understand why it’s special.

How do you mainly use this car? (optional): Commuter (short/medium distance)
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.

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Reviews Porsche 911 Convertible

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

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Porsche 911 Convertible

Costs and Consumption
Price
50,300 - 82,100 £
Price
138,000 - 244,500 £
Consumption L/100km
1.6 - 9.4 L/100km
Consumption L/100km
10.5 - 13.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
122 - 128 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
41 - 214 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
1,985 - 2,400 kg
Curb weight
1,572 - 1,900 kg
Trunk capacity
390 - 620 L
Trunk capacity
163 - 373 L
Length
-
Length
-
Width
1,890 - 1,920 mm
Width
1,852 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
475 - 575 kg
Payload
195 - 345 kg

Engine and Performance
Engine Type
Diesel MHEV, Plugin Hybrid, Petrol MHEV
Engine Type
Petrol, Full Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
186 - 472 HP
Power HP
394 - 711 HP
Acceleration 0-100km/h
4.2 - 9 s
Acceleration 0-100km/h
2.6 - 4.7 s
Max Speed
-
Max Speed
-
Torque
380 - 750 Nm
Torque
450 - 800 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6
Power kW
137 - 347 kW
Power kW
290 - 523 kW
Engine capacity
1,993 - 2,999 cm3
Engine capacity
2,981 - 3,996 cm3

General
Model Year
2,025 - 2,026
Model Year
2,024 - 2,026
CO2 Efficiency Class
D, B, E, F, G
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
Is the Mercedes GLC offered with different drivetrains?

Available configurations include 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.