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Audi A6 Avant vs Mercedes GLB comparison

Compare performance (367 HP vs 354 HP), boot space and price (49,700 £ vs 50,600 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Avant or Mercedes GLB?

Audi A6 Avant vs Mercedes GLB: Key differences

Audi A6 Avant

  • barely cheaper
  • barely more power
  • a bit quicker 0–100 km/h
  • a bit lighter

Mercedes GLB

3.2 (3 Reviews)
rate
  • significantly more electric range
  • only 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 Avant

Costs and Efficiency:

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

Audi A6 Avant is barely cheaper – starting at 49,700 £ , while the Mercedes GLB costs 50,600 £ . That’s a price difference of around 898 £.

As for electric range, the Mercedes GLB offers significantly more range – reaching up to 631 km, about 530 km more than the Audi A6 Avant.

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 Avant offers barely more power – delivering 367 HP compared to 354 HP. That’s roughly 13 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A6 Avant is a bit quicker – completing the sprint in 4.7 s, while the Mercedes GLB takes 5.5 s. That’s about 0.8 s quicker.

There’s also a difference in torque: the Audi A6 Avant delivers a bit more torque with 580 Nm compared to 515 Nm. That’s about 65 Nm more.

A6 Avant

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In terms of curb weight, Audi A6 Avant is a bit lighter – 1,865 kg compared to 2,200 kg. The difference is around 335 kg.

Looking at boot space, the Mercedes GLB offers only slightly more boot space – 540 L compared to 503 L. That’s a difference of about 37 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 Mercedes GLB is decisively ahead 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 £50,600
GLB

Mercedes GLB

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 272 - 354 HP
  • Consumption kWh/100km : 15.8 - 15.9 kWh/100km
  • Electric Range : 614 - 631 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 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 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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Mercedes GLB

Costs and Consumption
Price
49,700 - 70,200 £
Price
50,600 - 62,400 £
Consumption L/100km
2.3 - 7.5 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Electric Range
94 - 101 km
Electric Range
614 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 170 g/km
co2
0 g/km
Fuel tank capacity
56 - 60 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
1,865 - 2,240 kg
Curb weight
2,200 - 2,280 kg
Trunk capacity
404 - 503 L
Trunk capacity
540 L
Length
4,999 mm
Length
-
Width
1,875 mm
Width
1,861 mm
Height
1,472 mm
Height
-
Max trunk capacity
1,497 - 1,534 L
Max trunk capacity
-
Payload
535 - 570 kg
Payload
500 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
204 - 367 HP
Power HP
272 - 354 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
5.5 - 7.4 s
Max Speed
238 - 250 km/h
Max Speed
-
Torque
340 - 580 Nm
Torque
335 - 515 Nm
Number of Cylinders
4 - 6
Number of Cylinders
-
Power kW
150 - 270 kW
Power kW
200 - 260 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
-

General
Model Year
2,025
Model Year
2,026
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
A
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.