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Audi A6 e-tron Avant vs Mercedes GLB comparison

Compare performance (551 HP vs 354 HP), boot space and price (55,200 £ vs 50,600 £ ) at a glance. Find out which car is the better choice for you – Audi A6 e-tron Avant or Mercedes GLB?

Audi A6 e-tron Avant vs Mercedes GLB: Key differences

Audi A6 e-tron Avant

3.4 (3 Reviews)
rate
  • noticeably more power
  • barely more efficient
  • slightly more electric range
  • clearly quicker 0–100 km/h
  • marginally lighter

Mercedes GLB

3.2 (3 Reviews)
rate
  • marginally cheaper
  • very slightly more trunk space

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

A6 e-tron Avant

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes GLB is marginally cheaper – starting at 50,600 £ , while the Audi A6 e-tron Avant costs 55,200 £ . That’s a price difference of around 4,630 £.

In terms of energy consumption, the Audi A6 e-tron Avant is barely more efficient: consuming 14.8 kWh/100km compared to 15.8 kWh/100km for the Mercedes GLB. That’s a difference of about 1 kWh/100km.

As for electric range, the Audi A6 e-tron Avant offers slightly more range – reaching up to 716 km, about 85 km more than the Mercedes GLB.

GLB

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 Audi A6 e-tron Avant offers noticeably more power – delivering 551 HP compared to 354 HP. That’s roughly 197 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A6 e-tron Avant is clearly quicker – completing the sprint in 3.9 s, while the Mercedes GLB takes 5.5 s. That’s about 1.6 s quicker.

There’s also a difference in torque: the Audi A6 e-tron Avant delivers noticeably more torque with 855 Nm compared to 515 Nm. That’s about 340 Nm more.

A6 e-tron 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, Audi A6 e-tron Avant is marginally lighter – 2,185 kg compared to 2,200 kg. The difference is around 15 kg.

Looking at boot space, the Mercedes GLB offers very slightly more boot space – 540 L compared to 502 L. That’s a difference of about 38 L.

Maximum payload is identical – both can carry up to 500 kg.

Who wins the race in the data check?

The Audi A6 e-tron Avant stands well ahead of its rival 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 £55,200
A6 e-tron Avant

Audi A6 e-tron Avant

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 326 - 551 HP
  • Consumption kWh/100km : 14.8 - 17 kWh/100km
  • Electric Range : 539 - 716 km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A6 e-tron Avant

The Audi A6 e-tron Avant wraps Audi's trademark refinement into a sleek electric estate that looks at home in the city or on the open road. Inside it's grown-up and tech-forward with practical packaging for family life, delivering a composed, confident drive that makes everyday hauling feel a bit more special and slightly futuristic.

details
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Reviews Audi A6 e-tron Avant

3.4 (3 Reviews)
rate

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

Mercedes GLB

The Mercedes GLB is a practical compact SUV that mixes boxy, family-friendly space with premium German polish, making it an appealing choice for buyers who want usefulness without pretension. It drives with a confident, composed feel and somehow manages to look both rugged and refined — the grown-up SUV that still likes to have fun.

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Reviews Mercedes GLB

3.2 (3 Reviews)
rate
Hans
19 Feb 2026, 02:39:00

Great car — very satisfied with the GLB 250 4MATIC.

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

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Costs and Consumption
Price
55,200 - 100,100 £
Price
50,600 - 62,400 £
Consumption L/100km
-
Consumption L/100km
-
Consumption kWh/100km
14.8 - 17 kWh/100km
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Electric Range
539 - 716 km
Electric Range
614 - 631 km
Battery Capacity
75.8 - 94.9 kWh
Battery Capacity
-
co2
0 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
2,185 - 2,410 kg
Curb weight
2,200 - 2,280 kg
Trunk capacity
502 L
Trunk capacity
540 L
Length
4,928 mm
Length
-
Width
1,923 mm
Width
1,861 mm
Height
1,504 - 1,527 mm
Height
-
Max trunk capacity
1,422 L
Max trunk capacity
-
Payload
470 - 500 kg
Payload
500 kg

Engine and Performance
Engine Type
Electric
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
326 - 551 HP
Power HP
272 - 354 HP
Acceleration 0-100km/h
3.9 - 6 s
Acceleration 0-100km/h
5.5 - 7.4 s
Max Speed
210 - 240 km/h
Max Speed
-
Torque
435 - 855 Nm
Torque
335 - 515 Nm
Number of Cylinders
-
Number of Cylinders
-
Power kW
240 - 405 kW
Power kW
200 - 260 kW
Engine capacity
-
Engine capacity
-

General
Model Year
2,024
Model Year
2,026
CO2 Efficiency Class
A
CO2 Efficiency Class
A
Brand
Audi
Brand
Mercedes-Benz
What drivetrain options does the Audi A6 e-tron Avant have?

The Audi A6 e-tron Avant is available as Rear-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.