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Audi A5 Sportback vs Mercedes GLB comparison

Compare performance (639 HP vs 354 HP), boot space and price (40,200 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Sportback or Mercedes GLB?

Audi A5 Sportback vs Mercedes GLB: Key differences

Audi A5 Sportback

  • very slightly cheaper
  • considerably more power
  • clearly more efficient
  • significantly quicker 0–100 km/h
  • very slightly lighter
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • clearly more electric range
  • clearly more trunk space
details

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

A5 Sportback

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 A5 Sportback is very slightly cheaper – starting at 40,200 £ , while the Mercedes GLB costs 43,200 £ . That’s a price difference of around 2,997 £.

Fuel consumption also shows a difference: the Audi A5 Sportback uses 2 L/100km and is clearly more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 3.7 L/100km.

As for electric range, the Mercedes GLB offers clearly more range – reaching up to 631 km, about 521 km more than the Audi A5 Sportback.

GLB

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Audi A5 Sportback 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 Sportback 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 A5 Sportback delivers visibly more torque with 825 Nm compared to 515 Nm. That’s about 310 Nm more.

A5 Sportback

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 Sportback is very slightly lighter – 1,770 kg compared to 1,840 kg. The difference is around 70 kg.

Looking at boot space, the Mercedes GLB offers clearly more boot space – 540 L compared to 331 L. That’s a difference of about 209 L.

When it comes to payload, the Audi A5 Sportback carries barely more – 530 kg compared to 505 kg. That’s a difference of about 25 kg.

Who wins the race in the data check?

The Audi A5 Sportback 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 £40,200
A5 Sportback

Audi A5 Sportback

  • Engine Type : Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Front-Wheel Drive
  • Power HP : 150 - 639 HP
  • Consumption L/100km : 2 - 7.6 L/100km
  • Electric Range : 84 - 110 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 A5 Sportback

The Audi A5 Sportback dresses up sleek coupe proportions with the everyday sense of a practical hatchback, so you get striking looks without the compromises. Behind the wheel it balances poise and comfort with premium trimmings that make daily driving feel a little bit special — ideal for buyers who want style and substance in equal measure.

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Reviews Audi A5 Sportback

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 A5 Sportback
Mercedes GLB

Costs and Consumption
Price
40,200 - 91,000 £
Price
43,200 - 62,400 £
Consumption L/100km
2 - 7.6 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
84 - 110 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
45 - 172 g/km
co2
0 - 138 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,770 - 2,430 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
331 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
475 - 530 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Plugin 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 drivetrain options does the Audi A5 Sportback have?

The Audi A5 Sportback 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.