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Audi A5 Sportback vs Mercedes GLS comparison

Compare performance (639 HP vs 404 HP), boot space and price (40,200 £ vs 92,700 £ ) at a glance. Find out which car is the better choice for you – Audi A5 Sportback or Mercedes GLS?

Audi A5 Sportback vs Mercedes GLS: Key differences

Audi A5 Sportback

  • significantly cheaper
  • clearly more power
  • considerably more efficient
  • considerably quicker 0–100 km/h
  • clearly lighter
  • clearly more trunk space
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Mercedes GLS

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By Achim Sedelmaier

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

A5 Sportback

Costs and Efficiency:

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

Audi A5 Sportback is significantly cheaper – starting at 40,200 £ , while the Mercedes GLS costs 92,700 £ . That’s a price difference of around 52,462 £.

Fuel consumption also shows a difference: the Audi A5 Sportback uses 2 L/100km and is considerably more efficient than the Mercedes GLS with 7.9 L/100km. The difference is about 5.9 L/100km.

GLS

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 clearly more power – delivering 639 HP compared to 404 HP. That’s roughly 235 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A5 Sportback is considerably quicker – completing the sprint in 3.7 s, while the Mercedes GLS takes 5.6 s. That’s about 1.9 s quicker.

There’s also a difference in torque: the Audi A5 Sportback delivers marginally more torque with 825 Nm compared to 750 Nm. That’s about 75 Nm more.

A5 Sportback

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Seats: Mercedes GLS offers more seats – 7 vs 5.

In terms of curb weight, Audi A5 Sportback is clearly lighter – 1,770 kg compared to 2,580 kg. The difference is around 810 kg.

Looking at boot space, the Audi A5 Sportback offers clearly more boot space – 445 L compared to 355 L. That’s a difference of about 90 L.

When it comes to payload, the Mercedes GLS carries clearly more – 820 kg compared to 530 kg. That’s a difference of about 290 kg.

Who wins the race in the data check?

The Audi A5 Sportback is clearly superior 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
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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

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Mercedes GLS

The GLS — usually just called the GLS — is Mercedes' flagship SUV, wrapping limousine-like comfort and commanding road presence into a smart, family-ready package. It pampers occupants with a hushed cabin, premium materials and intuitive tech, while still managing to feel confident and a little indulgent on the daily commute.

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Reviews Mercedes GLS

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Audi A5 Sportback
Mercedes GLS

Costs and Consumption
Price
40,200 - 91,000 £
Price
92,700 - 104,600 £
Consumption L/100km
2 - 7.6 L/100km
Consumption L/100km
7.9 - 9.9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
84 - 110 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
45 - 172 g/km
co2
206 - 226 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
7
Doors
-
Doors
-
Curb weight
1,770 - 2,430 kg
Curb weight
2,580 - 2,670 kg
Trunk capacity
331 - 445 L
Trunk capacity
355 L
Length
-
Length
-
Width
1,860 - 1,952 mm
Width
1,956 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
475 - 530 kg
Payload
810 - 820 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol, Diesel MHEV, Petrol MHEV
Engine Type
Petrol MHEV, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic, Automatic Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
All-Wheel Drive, Front-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
150 - 639 HP
Power HP
336 - 404 HP
Acceleration 0-100km/h
3.7 - 9.8 s
Acceleration 0-100km/h
5.6 - 6.2 s
Max Speed
-
Max Speed
-
Torque
280 - 825 Nm
Torque
560 - 750 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6
Power kW
110 - 470 kW
Power kW
247 - 297 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
2,989 - 2,999 cm3

General
Model Year
2,025 - 2,026
Model Year
2026
CO2 Efficiency Class
B, E, F, D
CO2 Efficiency Class
G
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.