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Audi A6 Avant vs Mercedes GLA comparison

Compare performance (367 HP vs 421 HP), boot space and price (49,700 £ vs 38,800 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Avant or Mercedes GLA?

Audi A6 Avant vs Mercedes GLA: Key differences

Audi A6 Avant

  • noticeably more efficient
  • markedly more electric range
  • somewhat more trunk space
details

Mercedes GLA

4.5 (4 Reviews)
rate
  • clearly cheaper
  • slightly more power
  • very slightly quicker 0–100 km/h
  • somewhat 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

A6 Avant

Costs and Efficiency:

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

Mercedes GLA is clearly cheaper – starting at 38,800 £ , while the Audi A6 Avant costs 49,700 £ . That’s a price difference of around 10,878 £.

Fuel consumption also shows a difference: the Audi A6 Avant uses 2.3 L/100km and is noticeably more efficient than the Mercedes GLA with 2.9 L/100km. The difference is about 0.6 L/100km.

As for electric range, the Audi A6 Avant offers markedly more range – reaching up to 101 km, about 27 km more than the Mercedes GLA.

GLA

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 Mercedes GLA offers slightly more power – delivering 421 HP compared to 367 HP. That’s roughly 54 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLA is very slightly quicker – completing the sprint in 4.3 s, while the Audi A6 Avant takes 4.7 s. That’s about 0.4 s quicker.

There’s also a difference in torque: the Audi A6 Avant delivers moderately more torque with 580 Nm compared to 500 Nm. That’s about 80 Nm more.

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.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes GLA is somewhat lighter – 1,570 kg compared to 1,865 kg. The difference is around 295 kg.

Looking at boot space, the Audi A6 Avant offers somewhat more boot space – 503 L compared to 435 L. That’s a difference of about 68 L.

When it comes to payload, the Audi A6 Avant carries somewhat more – 570 kg compared to 500 kg. That’s a difference of about 70 kg.

Who wins the race in the data check?

The Audi A6 Avant holds a decisive overall lead 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 £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/100km
  • Electric Range : 94 - 101 km
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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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Reviews Audi A6 Avant

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

Mercedes GLA

The Mercedes GLA is a compact luxury crossover that brings Mercedes-Benz's refined design and premium cabin materials into a practical, city-friendly package. It combines comfortable ride quality and intuitive tech with poised handling, making it a confident choice for everyday driving and longer journeys.

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Reviews Mercedes GLA

4.5 (4 Reviews)
rate
Lucien
1 May 2026, 07:12:24

GLA 180 petrol. Ideal for city and highway. Very smooth and quiet. The automatic gearbox is a delight. Average consumption 6.2 L/100 km. Special edition 180 Cyber Edition, leather seats....

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Gutter
24 Feb 2026, 21:53:27

Super nimble, very impressive power from this 1,300cc mild‑hybrid engine — in town, on the road and on the motorway for this 2025 GLA 180 Style AMG... premium interior!

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Serge
16 Jan 2026, 16:09:11

You have to compare like with like — the GLA should be compared to the Q3, not the Q2 as in your study!

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Audi A6 Avant
Mercedes GLA

Costs and Consumption
Price
49,700 - 70,200 £
Price
38,800 - 75,300 £
Consumption L/100km
2.3 - 7.5 L/100km
Consumption L/100km
2.9 - 9.5 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
74 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 170 g/km
co2
66 - 216 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,865 - 2,240 kg
Curb weight
1,570 - 1,810 kg
Trunk capacity
404 - 503 L
Trunk capacity
385 - 435 L
Length
-
Length
-
Width
1,875 mm
Width
1,834 - 1,849 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 570 kg
Payload
480 - 500 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel, Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
204 - 367 HP
Power HP
116 - 421 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
4.3 - 11 s
Max Speed
-
Max Speed
-
Torque
340 - 580 Nm
Torque
230 - 500 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
85 - 310 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
E, F, B, G
Brand
Audi
Brand
Mercedes-Benz
Is the Audi A6 Avant offered with different drivetrains?

The Audi A6 Avant is offered with Front-Wheel Drive or 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.