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Audi A4 Avant vs Mercedes GLB comparison

Compare performance (470 HP vs 354 HP), boot space and price (37,200 £ vs 50,600 £ ) at a glance. Find out which car is the better choice for you – Audi A4 Avant or Mercedes GLB?

Audi A4 Avant vs Mercedes GLB: Key differences

Audi A4 Avant

  • visibly cheaper
  • noticeably more power
  • significantly quicker 0–100 km/h
  • noticeably lighter

Mercedes GLB

3.6 (4 Reviews)
rate
  • 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.

By Achim Sedelmaier

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

A4 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.

Audi A4 Avant is visibly cheaper – starting at 37,200 £ , while the Mercedes GLB costs 50,600 £ . That’s a price difference of around 13,370 £.

GLB

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Audi A4 Avant offers noticeably more power – delivering 470 HP compared to 354 HP. That’s roughly 116 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A4 Avant is significantly quicker – completing the sprint in 3.7 s, while the Mercedes GLB takes 5.5 s. That’s about 1.8 s quicker.

There’s also a difference in torque: the Audi A4 Avant delivers slightly more torque with 600 Nm compared to 515 Nm. That’s about 85 Nm more.

A4 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 A4 Avant is noticeably lighter – 1,595 kg compared to 2,200 kg. The difference is around 605 kg.

Looking at boot space, the Mercedes GLB offers only slightly more boot space – 540 L compared to 495 L. That’s a difference of about 45 L.

When it comes to payload, the Audi A4 Avant carries somewhat more – 565 kg compared to 500 kg. That’s a difference of about 65 kg.

Who wins the race in the data check?

The Audi A4 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 £37,200
A4 Avant

Audi A4 Avant

  • Engine Type : Diesel MHEV, Petrol MHEV, Petrol
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Front-Wheel Drive
  • Power HP : 136 - 470 HP
  • Consumption L/100km : 4.8 - 9.7 L/100km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A4 Avant

The Audi A4 Avant blends elegant, understated styling with practical estate versatility, making it a polished choice for drivers who want both poise and generous cargo space. Inside, the cabin feels premium and tech-forward while the composed driving manners turn routine journeys into a quietly satisfying experience—exactly the sensible indulgence buyers will appreciate.

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Reviews Audi A4 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

3.6 (4 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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Audi A4 Avant
Mercedes GLB

Costs and Consumption
Price
37,200 - 122,500 £
Price
50,600 - 62,400 £
Consumption L/100km
4.8 - 9.7 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
15.8 - 15.9 kWh/100km
Electric Range
-
Electric Range
614 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
126 - 220 g/km
co2
0 g/km
Fuel tank capacity
40 - 58 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
1,595 - 1,820 kg
Curb weight
2,200 - 2,280 kg
Trunk capacity
495 L
Trunk capacity
540 L
Length
4,750 - 4,782 mm
Length
-
Width
1,842 - 1,866 mm
Width
1,861 mm
Height
1,428 - 1,493 mm
Height
-
Max trunk capacity
1,495 L
Max trunk capacity
-
Payload
510 - 565 kg
Payload
500 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol MHEV, Petrol
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Automatic Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
All-Wheel Drive, Front-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
136 - 470 HP
Power HP
272 - 354 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
5.5 - 7.4 s
Max Speed
210 - 300 km/h
Max Speed
-
Torque
270 - 600 Nm
Torque
335 - 515 Nm
Number of Cylinders
4 - 6
Number of Cylinders
-
Power kW
100 - 346 kW
Power kW
200 - 260 kW
Engine capacity
1,968 - 2,894 cm3
Engine capacity
-

General
Model Year
2,023 - 2,024
Model Year
2,026
CO2 Efficiency Class
E, F, D, G
CO2 Efficiency Class
A
Brand
Audi
Brand
Mercedes-Benz
What drivetrain options does the Audi A4 Avant have?

The Audi A4 Avant is available as All-Wheel Drive or Front-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.