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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 43,200 £ ) 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 more power
  • substantially more efficient
  • a bit quicker 0–100 km/h
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • slightly cheaper
  • significantly more electric range
  • only slightly lighter
  • only slightly more trunk space
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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:

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

Mercedes GLB is slightly cheaper – starting at 43,200 £ , while the Audi A6 Avant costs 49,700 £ . That’s a price difference of around 6,517 £.

Fuel consumption also shows a difference: the Audi A6 Avant uses 2.3 L/100km and is substantially more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 3.4 L/100km.

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, Mercedes GLB is only slightly lighter – 1,840 kg compared to 1,865 kg. The difference is around 25 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 505 kg. That’s a difference of about 65 kg.

Who wins the race in the data check?

The Audi A6 Avant 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 £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 GLB

The Mercedes GLB is a compact luxury SUV that blends smart packaging with a polished, composed driving experience. Its flexible interior and premium feel make it a sensible pick for buyers who want Mercedes comfort and practicality in a smaller footprint.

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Reviews Mercedes GLB

3.6 (4 Reviews)
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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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Audi A6 Avant
Mercedes GLB

Costs and Consumption
Price
49,700 - 70,200 £
Price
43,200 - 62,400 £
Consumption L/100km
2.3 - 7.5 L/100km
Consumption L/100km
5.7 - 6.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
15.4 - 15.9 kWh/100km
Electric Range
94 - 101 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 170 g/km
co2
0 - 138 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
1,840 - 2,280 kg
Trunk capacity
404 - 503 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,875 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 570 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Electric, Full Hybrid
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
156 - 354 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
340 - 580 Nm
Torque
280 - 515 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
115 - 260 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,499 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
A, D, E
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.