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Audi A8 vs Mercedes GLB - Differences and prices compared

Compare performance (571 HP vs 320 HP), boot space and price (91400 £ vs 40500 £) at a glance. Find out which car is the better choice for you – Audi A8 or Mercedes GLB?

Audi A8

5 (1 Reviews)
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Mercedes GLB

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

A8 @ Audi AG

Costs and Efficiency:

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

Mercedes GLB has a decisively advantage in terms of price – it starts at 40500 £, while the Audi A8 costs 91400 £. That’s a price difference of around 50862 £.

Fuel consumption also shows a difference: Mercedes GLB manages with 5.60 L and is therefore distinct more efficient than the Audi A8 with 7 L. The difference is about 1.40 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 A8 has a significantly edge – offering 571 HP compared to 320 HP. That’s roughly 251 HP more horsepower.

In acceleration from 0 to 100 km/h, the Audi A8 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 A8 pulls convincingly stronger with 800 Nm compared to 400 Nm. That’s about 400 Nm difference.

A8 @ 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, Mercedes GLB is noticeable lighter – 1640 kg compared to 2035 kg. The difference is around 395 kg.

In terms of boot space, the Mercedes GLB offers slightly more room – 570 L compared to 505 L. That’s a difference of about 65 L.

When it comes to payload, Audi A8 distinct takes the win – 700 kg compared to 500 kg. That’s a difference of about 200 kg.

Who wins the race?

The Audi A8 proves to be dominates this comparison and therefore becomes our DriveDuel Champion!
Audi A8 is the better all-rounder in this comparison.

from about £91,400
A8 @ Audi AG

Audi A8

  • Engine Type : Petrol MHEV, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 286 - 571 HP
  • Consumption L/100km : 7 - 11.5 L
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Audi A8
Mercedes GLB

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A8

5 (1 Reviews)
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The Audi A8 arrives with the kind of quiet authority that makes other limousines feel like they’re trying too hard, offering a cabin wrapped in subtle luxury and tech that never demands attention. For buyers who want composed comfort and discreet status, it’s the sensible splurge that turns daily commutes into a private parade.

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A220717_overfull @ Audi AG
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A218438_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.

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Reviews Audi A8

5 (1 Reviews)
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Reviews Mercedes GLB

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Costs and Consumption
Price
91400 - 134900 £
Price
40500 - 65300 £
Consumption L/100km
7 - 11.5 L
Consumption L/100km
5.6 - 9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
183 - 260 g/km
co2
146 - 204 g/km
Fuel tank capacity
82 L
Fuel tank capacity
52 - 60 L

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
4
Doors
5
Curb weight
2035 - 2295 kg
Curb weight
1640 - 1820 kg
Trunk capacity
505 L
Trunk capacity
565 - 570 L
Length
5190 - 5320 mm
Length
4634 - 4650 mm
Width
1945 mm
Width
1834 - 1850 mm
Height
1473 - 1488 mm
Height
1665 - 1692 mm
Max trunk capacity
-
Max trunk capacity
1800 - 1805 L
Payload
540 - 700 kg
Payload
500 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV
Engine Type
Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
286 - 571 HP
Power HP
116 - 320 HP
Acceleration 0-100km/h
3.8 - 5.9 s
Acceleration 0-100km/h
5.5 - 11.5 s
Max Speed
250 km/h
Max Speed
188 - 250 km/h
Torque
500 - 800 Nm
Torque
230 - 400 Nm
Number of Cylinders
6 - 8
Number of Cylinders
4
Power kW
210 - 420 kW
Power kW
85 - 235 kW
Engine capacity
2967 - 3996 cm3
Engine capacity
1332 - 1991 cm3

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

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Is the Audi A8 offered with different drivetrains?

The Audi A8 is offered with 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.