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Audi Q8 vs Mercedes GLS comparison

Compare performance (640 HP vs 634 HP), boot space and price (77,300 £ vs 191,300 £ ) at a glance. Find out which car is the better choice for you – Audi Q8 or Mercedes GLS?

Audi Q8 vs Mercedes GLS: Key differences

Audi Q8

  • considerably cheaper
  • very slightly more power
  • significantly more efficient
  • somewhat quicker 0–100 km/h
  • visibly lighter
  • clearly more trunk space
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Mercedes GLS

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By Achim Sedelmaier

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

Q8

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.

Audi Q8 is considerably cheaper – starting at 77,300 £ , while the Mercedes GLS costs 191,300 £ . That’s a price difference of around 113,946 £.

Fuel consumption also shows a difference: the Audi Q8 uses 3.9 L/100km and is significantly more efficient than the Mercedes GLS with 13.3 L/100km. The difference is about 9.4 L/100km.

GLS

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 Audi Q8 offers very slightly more power – delivering 640 HP compared to 634 HP. That’s roughly 6 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi Q8 is somewhat quicker – completing the sprint in 3.6 s, while the Mercedes GLS takes 4.2 s. That’s about 0.6 s quicker.

Both models offer the same torque – 850 Nm.

Q8

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 GLS offers more seats – 7 vs 5.

In terms of curb weight, Audi Q8 is visibly lighter – 2,175 kg compared to 2,700 kg. The difference is around 525 kg.

Looking at boot space, the Audi Q8 offers clearly more boot space – 605 L compared to 355 L. That’s a difference of about 250 L.

When it comes to payload, the Mercedes GLS carries marginally more – 695 kg compared to 665 kg. That’s a difference of about 30 kg.

Who wins the race in the data check?

The Audi Q8 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 £77,300
Q8

Audi Q8

  • Engine Type : Petrol MHEV, Diesel MHEV, Petrol, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 231 - 640 HP
  • Consumption L/100km : 3.9 - 13.1 L/100km
  • Electric Range : 80 km
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi Q8

The Audi Q8 wraps coupe-like flair around a burly SUV stance, serving up a cabin dressed in premium materials and smart tech that puts comfort and swagger front and center. It’s composed and comfortable on long runs yet happy to play when asked, making it a tempting choice for buyers who want head-turning looks without surrendering everyday practicality.

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Mercedes GLS

The GLS — usually just called the GLS — is Mercedes' flagship SUV, wrapping limousine-like comfort and commanding road presence into a smart, family-ready package. It pampers occupants with a hushed cabin, premium materials and intuitive tech, while still managing to feel confident and a little indulgent on the daily commute.

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Mercedes GLS

Costs and Consumption
Price
77,300 - 137,100 £
Price
191,300 £
Consumption L/100km
3.9 - 13.1 L/100km
Consumption L/100km
13.3 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
80 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
88 - 297 g/km
co2
302 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
5
Seats
7
Doors
-
Doors
-
Curb weight
2,175 - 2,490 kg
Curb weight
2,700 kg
Trunk capacity
439 - 605 L
Trunk capacity
355 L
Length
-
Length
-
Width
1,995 - 2,007 mm
Width
1,956 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
620 - 665 kg
Payload
695 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Petrol, Plugin Hybrid
Engine Type
Petrol MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
231 - 640 HP
Power HP
634 HP
Acceleration 0-100km/h
3.6 - 7.1 s
Acceleration 0-100km/h
4.2 s
Max Speed
-
Max Speed
-
Torque
500 - 850 Nm
Torque
850 Nm
Number of Cylinders
6 - 8
Number of Cylinders
8
Power kW
170 - 471 kW
Power kW
466 kW
Engine capacity
2,967 - 3,996 cm3
Engine capacity
3,982 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
G, B
CO2 Efficiency Class
G
Brand
Audi
Brand
Mercedes-Benz
What drivetrain options does the Audi Q8 have?

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.