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Audi A3 Limousine vs Mercedes GLB comparison

Compare performance (400 HP vs 354 HP), boot space and price (27,700 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Audi A3 Limousine or Mercedes GLB?

Audi A3 Limousine vs Mercedes GLB: Key differences

Audi A3 Limousine

  • significantly cheaper
  • a bit more power
  • noticeably more efficient
  • clearly quicker 0–100 km/h
  • markedly lighter
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Mercedes GLB

3.6 (4 Reviews)
rate
  • clearly 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

A3 Limousine

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 Limousine is significantly cheaper – starting at 27,700 £ , while the Mercedes GLB costs 43,200 £ . That’s a price difference of around 15,512 £.

Fuel consumption also shows a difference: the Audi A3 Limousine uses 4.4 L/100km and is noticeably more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 1.3 L/100km.

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 A3 Limousine offers a bit more power – delivering 400 HP compared to 354 HP. That’s roughly 46 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Limousine is clearly quicker – completing the sprint in 3.8 s, while the Mercedes GLB takes 5.5 s. That’s about 1.7 s quicker.

There’s also a difference in torque: the Mercedes GLB delivers very slightly more torque with 515 Nm compared to 500 Nm. That’s about 15 Nm more.

A3 Limousine

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 A3 Limousine is markedly lighter – 1,345 kg compared to 1,840 kg. The difference is around 495 kg.

Looking at boot space, the Mercedes GLB offers clearly more boot space – 540 L compared to 425 L. That’s a difference of about 115 L.

When it comes to payload, the Audi A3 Limousine carries very slightly more – 520 kg compared to 505 kg. That’s a difference of about 15 kg.

Who wins the race in the data check?

The Audi A3 Limousine stands well ahead of its rival 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 £27,700
A3 Limousine

Audi A3 Limousine

  • Engine Type Petrol, Petrol MHEV, Diesel
  • Transmission Manual, Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 400 HP
  • Consumption L/100km 4.4 - 9.2 L/100km
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Audi A3 Limousine
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A3 Limousine

The Audi A3 sedan dresses up compact practicality in clean, premium lines, giving you the feel of an upscale small car with a proper boot. Inside it’s neat, driver-focused and nicely finished — a sensible, enjoyable daily companion that prefers poise over showy theatrics.

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Reviews Audi A3 Limousine

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 A3 Limousine
Mercedes GLB

Costs and Consumption
Price
27,700 - 94,300 £
Price
43,200 - 62,400 £
Consumption L/100km
4.4 - 9.2 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
-
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
115 - 208 g/km
co2
0 - 138 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,345 - 1,640 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
321 - 425 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,816 - 1,851 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
415 - 520 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel
Engine Type
Electric, Full Hybrid
Transmission
Manual, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, 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
116 - 400 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
3.8 - 10.1 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
220 - 500 Nm
Torque
280 - 515 Nm
Number of Cylinders
4 - 5
Number of Cylinders
4
Power kW
85 - 294 kW
Power kW
115 - 260 kW
Engine capacity
1,498 - 2,480 cm3
Engine capacity
1,499 cm3

General
Model Year
2,025 - 2,026
Model Year
2026
CO2 Efficiency Class
D, C, E, G
CO2 Efficiency Class
A, D, E
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A3 Limousine?

The Audi A3 Limousine is available as 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.