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Audi A8 vs Mercedes G Class comparison

Compare performance (571 HP vs 605 HP), boot space and price (91,400 £ vs 106,600 £ ) at a glance. Find out which car is the better choice for you – Audi A8 or Mercedes G Class?

Audi A8 vs Mercedes G Class: Key differences

Audi A8

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  • moderately cheaper
  • clearly more efficient
  • slightly quicker 0–100 km/h
  • clearly lighter
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Mercedes G Class

  • marginally more power
  • substantially more electric range
  • noticeably more trunk space
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By Achim Sedelmaier

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

A8

Costs and Efficiency:

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

Audi A8 is moderately cheaper – starting at 91,400 £ , while the Mercedes G Class costs 106,600 £ . That’s a price difference of around 15,219 £.

Fuel consumption also shows a difference: the Audi A8 uses 4.6 L/100km and is clearly more efficient than the Mercedes G Class with 8.7 L/100km. The difference is about 4.1 L/100km.

As for electric range, the Mercedes G Class offers substantially more range – reaching up to 479 km, about 421 km more than the Audi A8.

G Class

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 Mercedes G Class offers marginally more power – delivering 605 HP compared to 571 HP. That’s roughly 34 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A8 is slightly quicker – completing the sprint in 3.8 s, while the Mercedes G Class takes 4.4 s. That’s about 0.6 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.

A8

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.

Both vehicles offer seating for 5 people.

In terms of curb weight, Audi A8 is clearly lighter – 2,035 kg compared to 2,485 kg. The difference is around 450 kg.

Looking at boot space, the Mercedes G Class offers noticeably more boot space – 640 L compared to 390 L. That’s a difference of about 250 L.

When it comes to payload, the Mercedes G Class carries very slightly more – 715 kg compared to 700 kg. That’s a difference of about 15 kg.

Who wins the race in the data check?

The Mercedes G Class 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 £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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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

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View detailed analysis

Audi A8

The Audi A8 arrives with the kind of quiet authority that makes other limousines feel like they’re trying too hard, offering a cabin wrapped in subtle luxury and tech that never demands attention. For buyers who want composed comfort and discreet status, it’s the sensible splurge that turns daily commutes into a private parade.

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Reviews Audi A8

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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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Audi A8
Mercedes G Class

Costs and Consumption
Price
91,400 - 134,900 £
Price
106,600 - 171,000 £
Consumption L/100km
4.6 - 11.5 L/100km
Consumption L/100km
8.7 - 14.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
28 kWh/100km
Electric Range
58 km
Electric Range
479 km
Battery Capacity
-
Battery Capacity
-
co2
105 - 260 g/km
co2
0 - 336 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Off-Roader
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
2,035 - 2,415 kg
Curb weight
2,485 - 3,085 kg
Trunk capacity
390 L
Trunk capacity
640 L
Length
-
Length
-
Width
1,945 mm
Width
1,931 - 1,984 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
525 - 700 kg
Payload
115 - 715 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel MHEV, Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox, Reduction Gearbox
Drive Type
All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
286 - 571 HP
Power HP
387 - 605 HP
Acceleration 0-100km/h
3.8 - 5.9 s
Acceleration 0-100km/h
4.4 - 5.8 s
Max Speed
-
Max Speed
-
Torque
500 - 800 Nm
Torque
760 - 1,164 Nm
Number of Cylinders
6 - 8
Number of Cylinders
6 - 8
Power kW
210 - 420 kW
Power kW
285 - 445 kW
Engine capacity
2,967 - 3,996 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2025
Model Year
2,025 - 2,026
CO2 Efficiency Class
G, C
CO2 Efficiency Class
G, A
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A8?

The Audi A8 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.