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Audi A6 Avant vs Mercedes GLS - Differences and prices compared

Compare performance (367 HP vs 634 HP), boot space and price (49700 £ vs 96100 £) at a glance. Find out which car is the better choice for you – Audi A6 Avant or Mercedes GLS?

Audi A6 Avant

Mercedes GLS

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

A6 Avant

Costs and Efficiency:

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

Audi A6 Avant has a convincingly advantage in terms of price – it starts at 49700 £, while the Mercedes GLS costs 96100 £. That’s a price difference of around 46406 £.

Fuel consumption also shows a difference: Audi A6 Avant manages with 2.30 L and is therefore convincingly more efficient than the Mercedes GLS with 7.80 L. The difference is about 5.50 L per 100 km.

GLS

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 Mercedes GLS has a convincingly edge – offering 634 HP compared to 367 HP. That’s roughly 267 HP more horsepower.

In acceleration from 0 to 100 km/h, the Mercedes GLS is slightly quicker – completing the sprint in 4.20 s, while the Audi A6 Avant takes 4.70 s. That’s about 0.50 s faster.

In terms of top speed, the Mercedes GLS performs slightly better – reaching 280 km/h, while the Audi A6 Avant tops out at 250 km/h. The difference is around 30 km/h.

There’s also a difference in torque: Mercedes GLS pulls clearly perceptible stronger with 850 Nm compared to 550 Nm. That’s about 300 Nm difference.

A6 Avant

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 GLS offers evident more seating capacity – 7 vs 5.

In curb weight, Audi A6 Avant is distinct lighter – 1865 kg compared to 2550 kg. The difference is around 685 kg.

In terms of boot space, the Audi A6 Avant offers noticeable more room – 503 L compared to 355 L. That’s a difference of about 148 L.

In maximum load capacity, the Mercedes GLS performs noticeable better – up to 2400 L, which is about 866 L more than the Audi A6 Avant.

When it comes to payload, Mercedes GLS somewhat takes the win – 695 kg compared to 570 kg. That’s a difference of about 125 kg.

Who comes out on top?

Overall, the Audi A6 Avant shows itself to be outperforms in nearly all aspects and secures the title of DriveDuel Champion.
It convinces with the more balanced overall package and proves to be the more versatile choice for everyday use.

from about £49,700
A6 Avant

Audi A6 Avant

  • Engine Type : Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 204 - 367 HP
  • Consumption L/100km : 2.3 - 7.5 L
  • Electric Range : 94 - 101 km
details
Audi A6 Avant
Mercedes GLS

Costs and Consumption
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Engine and Performance
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Dimensions and Body
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Audi A6 Avant

The Audi A6 Avant wraps executive poise and usable practicality into an impeccably finished estate that makes everyday driving feel noticeably more grown-up. It serves up a calm, composed ride and clever packaging for buyers who want space and refinement without ostentation — the sensible choice that still manages to impress.

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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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Reviews Audi A6 Avant

Reviews Mercedes GLS

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GLS

Costs and Consumption
Price
49700 - 70200 £
Price
96100 - 208500 £
Consumption L/100km
2.3 - 7.5 L
Consumption L/100km
7.8 - 13.7 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
-
Battery Capacity
20.70 kWh
Battery Capacity
-
co2
53 - 170 g/km
co2
204 - 310 g/km
Fuel tank capacity
46 - 60 L
Fuel tank capacity
90 L

Dimensions and Body
Body Type
Estate
Body Type
SUV
Seats
5
Seats
7
Doors
5
Doors
5
Curb weight
1865 - 2240 kg
Curb weight
2550 - 2825 kg
Trunk capacity
404 - 503 L
Trunk capacity
355 L
Length
4999 mm
Length
5208 - 5233 mm
Width
1875 mm
Width
1956 mm
Height
1472 mm
Height
1782 - 1838 mm
Max trunk capacity
1423 - 1534 L
Max trunk capacity
2400 L
Payload
535 - 570 kg
Payload
445 - 695 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
204 - 367 HP
Power HP
333 - 634 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
4.2 - 6.7 s
Max Speed
238 - 250 km/h
Max Speed
238 - 280 km/h
Torque
340 - 550 Nm
Torque
500 - 850 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6 - 8
Power kW
150 - 270 kW
Power kW
245 - 466 kW
Engine capacity
1968 - 2995 cm3
Engine capacity
2989 - 3982 cm3

General
Model Year
2025
Model Year
2024 - 2025
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
G
Brand
Audi
Brand
Mercedes-Benz

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Is the Audi A6 Avant offered with different drivetrains?

The Audi A6 Avant is available as Front-Wheel Drive or All-Wheel Drive.

The prices and data displayed are estimates based on German list prices and may vary by country. This information is not legally binding.