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Audi A5 Avant vs Mercedes GLB comparison

Compare performance (639 HP vs 354 HP), boot space and price (41,600 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Avant or Mercedes GLB?

Audi A5 Avant vs Mercedes GLB: Key differences

Audi A5 Avant

4.4 (1 Reviews)
rate
  • only slightly cheaper
  • considerably more power
  • clearly more efficient
  • considerably quicker 0–100 km/h
  • marginally lighter
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Mercedes GLB

3.6 (4 Reviews)
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  • clearly more electric range
  • a bit 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.

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

A5 Avant

Costs and Efficiency:

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

Audi A5 Avant is only slightly cheaper – starting at 41,600 £ , while the Mercedes GLB costs 43,200 £ . That’s a price difference of around 1,583 £.

Fuel consumption also shows a difference: the Audi A5 Avant uses 1.8 L/100km and is clearly more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 3.9 L/100km.

As for electric range, the Mercedes GLB offers clearly more range – reaching up to 631 km, about 513 km more than the Audi A5 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 A5 Avant offers considerably more power – delivering 639 HP compared to 354 HP. That’s roughly 285 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A5 Avant is considerably 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 A5 Avant delivers clearly more torque with 825 Nm compared to 515 Nm. That’s about 310 Nm more.

A5 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 A5 Avant is marginally lighter – 1,785 kg compared to 1,840 kg. The difference is around 55 kg.

Looking at boot space, the Mercedes GLB offers a bit more boot space – 540 L compared to 476 L. That’s a difference of about 64 L.

When it comes to payload, the Audi A5 Avant carries very slightly more – 535 kg compared to 505 kg. That’s a difference of about 30 kg.

Who wins the race in the data check?

The Audi A5 Avant is far ahead overall 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 £41,600
A5 Avant

Audi A5 Avant

  • Engine Type Plug-in Hybrid, Petrol, Diesel MHEV, Petrol MHEV
  • Transmission Automatic
  • Drive Type All-Wheel Drive, Front-Wheel Drive
  • Power HP 150 - 639 HP
  • Consumption L/100km 1.8 - 7.7 L/100km
  • Electric Range 83 - 118 km
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Frequently compared as well

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A5 Avant

The Audi A5 Avant dresses like a sleek coupe but carries like a sensible estate, offering buyers a rare blend of glamour and everyday practicality. Inside, the cabin feels beautifully sorted and the drive is composed and engaging, making routine errands feel a touch more enjoyable than they have any right to be.

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Reviews Audi A5 Avant

4.4 (1 Reviews)
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Hje
10 May 2026, 10:01:51

I do a lot of highway and generally long distance driving where A5 is superior to BMW 3.

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

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)
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 A5 Avant
Mercedes GLB

Costs and Consumption
Price
41,600 - 92,400 £
Price
43,200 - 62,400 £
Consumption L/100km
1.8 - 7.7 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
83 - 118 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
40 - 175 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
1,785 - 2,445 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
361 - 476 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,860 - 1,952 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 535 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Plug-in Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Engine Type
Electric, Full Hybrid
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
150 - 639 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
280 - 825 Nm
Torque
280 - 515 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
110 - 470 kW
Power kW
115 - 260 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,499 cm3

General
Model Year
2,025 - 2,026
Model Year
2026
CO2 Efficiency Class
B, E, F, D
CO2 Efficiency Class
A, D, E
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A5 Avant?

Available configurations include 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.