@ Audi AG
@ Mercedes-Benz Group Media
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Audi A3 Sportback vs Mercedes GLB - Differences and prices compared

Compare performance (400 HP vs 320 HP), boot space and price (26800 £ vs 40500 £) at a glance. Find out which car is the better choice for you – Audi A3 Sportback or Mercedes GLB?

Audi A3 Sportback

Mercedes GLB

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

A3 Sportback @ Audi AG

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

Audi A3 Sportback has a significantly advantage in terms of price – it starts at 26800 £, while the Mercedes GLB costs 40500 £. That’s a price difference of around 13681 £.

Fuel consumption also shows a difference: Audi A3 Sportback manages with 1.10 L and is therefore clearly more efficient than the Mercedes GLB with 5.60 L. The difference is about 4.50 L per 100 km.

GLB @ Mercedes-Benz Group Media

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 A3 Sportback has a to a small extent edge – offering 400 HP compared to 320 HP. That’s roughly 80 HP more horsepower.

In acceleration from 0 to 100 km/h, the Audi A3 Sportback is significantly quicker – completing the sprint in 3.80 s, while the Mercedes GLB takes 5.50 s. That’s about 1.70 s faster.

In terms of top speed, the performs better – reaching , while the tops out at . The difference is around .

There’s also a difference in torque: Audi A3 Sportback pulls slightly stronger with 500 Nm compared to 400 Nm. That’s about 100 Nm difference.

A3 Sportback @ Audi AG

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Seats: offers more seating capacity – vs .

In curb weight, Audi A3 Sportback is evident lighter – 1360 kg compared to 1640 kg. The difference is around 280 kg.

In terms of boot space, the Mercedes GLB offers noticeable more room – 570 L compared to 380 L. That’s a difference of about 190 L.

In maximum load capacity, the Mercedes GLB performs noticeable better – up to 1805 L, which is about 605 L more than the Audi A3 Sportback.

When it comes to payload, Mercedes GLB slight takes the win – 500 kg compared to 480 kg. That’s a difference of about 20 kg.

Who comes out on top?

Overall, the Audi A3 Sportback shows itself to be is largely superior and secures the title of DriveDuel Champion.
It convinces with the more balanced overall package and proves to be the more versatile choice for everyday use.

from about £26,800
A3 Sportback @ Audi AG

Audi A3 Sportback

  • Engine Type : Petrol, Petrol MHEV, Diesel, Plugin Hybrid
  • Transmission : Manuel, Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 400 HP
  • Consumption L/100km : 1.1 - 9.3 L
  • Electric Range : 134 - 141 km
details
Audi A3 Sportback
Mercedes GLB

Costs and Consumption
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Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A3 Sportback

The Audi A3 Sportback wraps premium materials and crisp German design into a practical hatchback package that makes daily driving feel smart rather than showy. It’s nimble in the city, composed on longer trips, and carries just enough swagger to satisfy buyers who want quality without shouting about it.

details
A202267_overfull @ Audi AG
A202258_overfull @ Audi AG
A202235_overfull @ Audi AG
A202271_overfull @ Audi AG
A201906_overfull @ Audi AG
A202227_overfull @ Audi AG

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.

details
19C0853_001 @ Mercedes-Benz Group Media
19C0853_003 @ Mercedes-Benz Group Media
19C0853_015 @ Mercedes-Benz Group Media
19C0853_069 @ Mercedes-Benz Group Media
19C0797_007 @ Mercedes-Benz Group Media

Reviews Audi A3 Sportback

Reviews Mercedes GLB

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Costs and Consumption
Price
26800 - 56600 £
Price
40500 - 65300 £
Consumption L/100km
1.1 - 9.3 L
Consumption L/100km
5.6 - 9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
134 - 141 km
Electric Range
-
Battery Capacity
19.70 kWh
Battery Capacity
-
co2
25 - 211 g/km
co2
146 - 204 g/km
Fuel tank capacity
40 - 55 L
Fuel tank capacity
52 - 60 L

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
1360 - 1685 kg
Curb weight
1640 - 1820 kg
Trunk capacity
280 - 380 L
Trunk capacity
565 - 570 L
Length
4352 - 4381 mm
Length
4634 - 4650 mm
Width
1816 - 1851 mm
Width
1834 - 1850 mm
Height
1415 - 1470 mm
Height
1665 - 1692 mm
Max trunk capacity
1100 - 1200 L
Max trunk capacity
1800 - 1805 L
Payload
410 - 480 kg
Payload
500 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
116 - 400 HP
Power HP
116 - 320 HP
Acceleration 0-100km/h
3.8 - 10.1 s
Acceleration 0-100km/h
5.5 - 11.5 s
Max Speed
205 - 250 km/h
Max Speed
188 - 250 km/h
Torque
220 - 500 Nm
Torque
230 - 400 Nm
Number of Cylinders
4 - 5
Number of Cylinders
4
Power kW
85 - 294 kW
Power kW
85 - 235 kW
Engine capacity
1498 - 2480 cm3
Engine capacity
1332 - 1991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D, F, E, G, B
CO2 Efficiency Class
E, F, G
Brand
Audi
Brand
Mercedes-Benz

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What drive types are available for the Audi A3 Sportback?

The Audi A3 Sportback is offered with Front-Wheel Drive or All-Wheel Drive.

The prices and data displayed are estimates based on German list prices and may vary by country. This information is not legally binding.