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Audi A6 Limousine vs Mercedes GLB comparison

Compare performance (367 HP vs 354 HP), boot space and price (47,600 £ vs 43,200 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Limousine or Mercedes GLB?

Audi A6 Limousine vs Mercedes GLB: Key differences

Audi A6 Limousine

  • very slightly more power
  • significantly more efficient
  • somewhat quicker 0–100 km/h
details

Mercedes GLB

3.6 (4 Reviews)
rate
  • somewhat cheaper
  • substantially more electric range
  • only slightly lighter
  • marginally 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.

By Achim Sedelmaier

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

A6 Limousine

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Mercedes GLB is somewhat cheaper – starting at 43,200 £ , while the Audi A6 Limousine costs 47,600 £ . That’s a price difference of around 4,374 £.

Fuel consumption also shows a difference: the Audi A6 Limousine uses 2.2 L/100km and is significantly more efficient than the Mercedes GLB with 5.7 L/100km. The difference is about 3.5 L/100km.

As for electric range, the Mercedes GLB offers substantially more range – reaching up to 631 km, about 526 km more than the Audi A6 Limousine.

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 A6 Limousine offers very slightly more power – delivering 367 HP compared to 354 HP. That’s roughly 13 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A6 Limousine is somewhat quicker – completing the sprint in 4.7 s, while the Mercedes GLB takes 5.5 s. That’s about 0.8 s quicker.

There’s also a difference in torque: the Audi A6 Limousine delivers slightly more torque with 580 Nm compared to 515 Nm. That’s about 65 Nm more.

A6 Limousine

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes GLB is only slightly lighter – 1,840 kg compared to 1,845 kg. The difference is around 5 kg.

Looking at boot space, the Mercedes GLB offers marginally more boot space – 540 L compared to 492 L. That’s a difference of about 48 L.

When it comes to payload, the Audi A6 Limousine carries slightly more – 625 kg compared to 505 kg. That’s a difference of about 120 kg.

Who wins the race in the data check?

The Audi A6 Limousine holds a decisive overall lead 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 £47,600
A6 Limousine

Audi A6 Limousine

  • Engine Type Petrol, Diesel MHEV, Petrol MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 204 - 367 HP
  • Consumption L/100km 2.2 - 7.3 L/100km
  • Electric Range 97 - 105 km
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Audi A6 Limousine
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A6 Limousine

The Audi A6 cuts a clean, purposeful silhouette with an interior that feels like a quiet, high-tech office on wheels—luxurious materials and clever gadgets make long journeys surprisingly pleasant. It balances composed, confident driving with enough flair to keep you entertained, making it a sensible choice for buyers who want executive polish without showing off.

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Reviews Audi A6 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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Costs and Consumption
Price
47,600 - 68,100 £
Price
43,200 - 62,400 £
Consumption L/100km
2.2 - 7.3 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
97 - 105 km
Electric Range
431 - 631 km
Battery Capacity
-
Battery Capacity
-
co2
49 - 166 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
1,845 - 2,220 kg
Curb weight
1,840 - 2,280 kg
Trunk capacity
354 - 492 L
Trunk capacity
540 L
Length
-
Length
-
Width
1,875 mm
Width
1,861 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 625 kg
Payload
485 - 505 kg

Engine and Performance
Engine Type
Petrol, Diesel MHEV, Petrol MHEV, Plugin Hybrid
Engine Type
Electric, Full Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
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
204 - 367 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
4.7 - 8.2 s
Acceleration 0-100km/h
5.5 - 9.7 s
Max Speed
-
Max Speed
-
Torque
340 - 580 Nm
Torque
280 - 515 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
115 - 260 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,499 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
A, D, E
Brand
Audi
Brand
Mercedes-Benz
What drivetrain options does the Audi A6 Limousine have?

Available configurations include 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.