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Mercedes G-Class vs Porsche 911 Convertible comparison

Compare performance (605 HP vs 711 HP), boot space and price (106,600 £ vs 138,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes G-Class or Porsche 911 Convertible?

Mercedes G-Class vs Porsche 911 Convertible: Key differences

Mercedes G-Class

  • clearly cheaper
  • markedly more efficient
  • significantly more trunk space
details

Porsche 911 Convertible

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

By Achim Sedelmaier

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

G-Class

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 G-Class is clearly cheaper – starting at 106,600 £ , while the Porsche 911 Convertible costs 138,000 £ . That’s a price difference of around 31,410 £.

Fuel consumption also shows a difference: the Mercedes G-Class uses 8.7 L/100km and is markedly more efficient than the Porsche 911 Convertible with 10.5 L/100km. The difference is about 1.8 L/100km.

911 Convertible

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 Convertible offers somewhat more power – delivering 711 HP compared to 605 HP. That’s roughly 106 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche 911 Convertible is significantly quicker – completing the sprint in 2.6 s, while the Mercedes G-Class takes 4.4 s. That’s about 1.8 s quicker.

There’s also a difference in torque: the Mercedes G-Class delivers clearly more torque with 1,164 Nm compared to 800 Nm. That’s about 364 Nm more.

G-Class

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Seats: Mercedes G-Class offers more seats – 5 vs 4.

In terms of curb weight, Porsche 911 Convertible is substantially lighter – 1,572 kg compared to 2,485 kg. The difference is around 913 kg.

Looking at boot space, the Mercedes G-Class offers significantly more boot space – 640 L compared to 373 L. That’s a difference of about 267 L.

When it comes to payload, the Mercedes G-Class carries substantially more – 715 kg compared to 345 kg. That’s a difference of about 370 kg.

Who wins the race in the data check?

The Mercedes G-Class 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 £106,600
G-Class

Mercedes G-Class

  • Engine Type Petrol MHEV, Diesel MHEV, Electric
  • Transmission Automatic
  • Drive Type All-Wheel Drive
  • Power HP 387 - 605 HP
  • Consumption L/100km 8.7 - 14.7 L/100km
  • Consumption kWh/100km 28 kWh/100km
  • Electric Range 479 km
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View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes G-Class

The G-Class, often called the G‑Wagen, is a blocky icon that blends unapologetic off-road prowess with a plush, modern cabin, announcing your arrival before you even step out. It’s equally at home crawling over rocks or cruising city streets, and owning one feels like adopting a very expensive, very capable personality.

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Reviews Mercedes G-Class

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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

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Costs and Consumption
Price
106,600 - 171,000 £
Price
138,000 - 244,500 £
Consumption L/100km
8.7 - 14.7 L/100km
Consumption L/100km
10.5 - 13.7 L/100km
Consumption kWh/100km
28 kWh/100km
Consumption kWh/100km
-
Electric Range
479 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 - 336 g/km
co2
237 - 310 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Off-Roader
Body Type
Convertible
Seats
5
Seats
2 - 4
Doors
-
Doors
-
Curb weight
2,485 - 3,085 kg
Curb weight
1,572 - 1,900 kg
Trunk capacity
640 L
Trunk capacity
163 - 373 L
Length
-
Length
-
Width
1,931 - 1,984 mm
Width
1,852 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
115 - 715 kg
Payload
195 - 345 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Electric
Engine Type
Petrol, Full Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Automatic Gearbox, Reduction Gearbox
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
387 - 605 HP
Power HP
394 - 711 HP
Acceleration 0-100km/h
4.4 - 5.8 s
Acceleration 0-100km/h
2.6 - 4.7 s
Max Speed
-
Max Speed
-
Torque
760 - 1,164 Nm
Torque
450 - 800 Nm
Number of Cylinders
6 - 8
Number of Cylinders
6
Power kW
285 - 445 kW
Power kW
290 - 523 kW
Engine capacity
2,989 - 3,982 cm3
Engine capacity
2,981 - 3,996 cm3

General
Model Year
2,025 - 2,026
Model Year
2,024 - 2,026
CO2 Efficiency Class
G, A
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
What drivetrain options does the Mercedes G-Class have?

The Mercedes G-Class is available as 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.