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Mazda 6 Saloon vs Mercedes GLS comparison

Compare performance (258 HP vs 404 HP), boot space and price (38,500 £ vs 92,700 £ ) at a glance. Find out which car is the better choice for you – Mazda 6 Saloon or Mercedes GLS?

Mazda 6 Saloon vs Mercedes GLS: Key differences

Mazda 6 Saloon

  • clearly cheaper
  • noticeably lighter
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Mercedes GLS

  • noticeably more power
  • markedly quicker 0–100 km/h
  • marginally more trunk space
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By Achim Sedelmaier

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

6 Saloon

Costs and Efficiency:

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

Mazda 6 Saloon is clearly cheaper – starting at 38,500 £ , while the Mercedes GLS costs 92,700 £ . That’s a price difference of around 54,177 £.

GLS

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Mercedes GLS offers noticeably more power – delivering 404 HP compared to 258 HP. That’s roughly 146 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLS is markedly quicker – completing the sprint in 5.6 s, while the Mazda 6 Saloon takes 7.6 s. That’s about 2 s quicker.

There’s also a difference in torque: the Mercedes GLS delivers considerably more torque with 750 Nm compared to 320 Nm. That’s about 430 Nm more.

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, Mazda 6 Saloon is noticeably lighter – 2,027 kg compared to 2,580 kg. The difference is around 553 kg.

Looking at boot space, the Mercedes GLS offers marginally more boot space – 355 L compared to 336 L. That’s a difference of about 19 L.

When it comes to payload, the Mercedes GLS carries clearly more – 820 kg compared to 360 kg. That’s a difference of about 460 kg.

Who wins the race in the data check?

The Mazda 6 Saloon is barely ahead 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 £38,500
6 Saloon

Mazda 6 Saloon

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive
  • Power HP 245 - 258 HP
  • Consumption kWh/100km 16.5 - 16.6 kWh/100km
  • Electric Range 479 - 552 km
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Mazda 6 Saloon

The Mazda6 saloon feels like the sensible yet stylish choice for buyers who want a car that drives with poise and looks sharper than its badge suggests. It mixes engaging handling, a refined cabin and everyday practicality without shouting for attention — perfect for those who prefer understated class with a wink.

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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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Mazda 6 Saloon
Mercedes GLS

Costs and Consumption
Price
38,500 - 41,600 £
Price
92,700 - 104,600 £
Consumption L/100km
-
Consumption L/100km
7.9 - 9.9 L/100km
Consumption kWh/100km
16.5 - 16.6 kWh/100km
Consumption kWh/100km
-
Electric Range
479 - 552 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 g/km
co2
206 - 226 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
7
Doors
5
Doors
-
Curb weight
2,027 - 2,028 kg
Curb weight
2,580 - 2,670 kg
Trunk capacity
336 L
Trunk capacity
355 L
Length
4,921 mm
Length
-
Width
1,890 mm
Width
1,956 mm
Height
1,491 mm
Height
-
Max trunk capacity
1,074 L
Max trunk capacity
-
Payload
359 - 360 kg
Payload
810 - 820 kg

Engine and Performance
Engine Type
Electric
Engine Type
Petrol MHEV, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Automatic Gearbox
Drive Type
Rear-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
245 - 258 HP
Power HP
336 - 404 HP
Acceleration 0-100km/h
7.6 - 7.8 s
Acceleration 0-100km/h
5.6 - 6.2 s
Max Speed
175 km/h
Max Speed
-
Torque
320 Nm
Torque
560 - 750 Nm
Number of Cylinders
-
Number of Cylinders
6
Power kW
180 - 190 kW
Power kW
247 - 297 kW
Engine capacity
-
Engine capacity
2,989 - 2,999 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
A
CO2 Efficiency Class
G
Brand
Mazda
Brand
Mercedes-Benz
What drive types are available for the Mazda 6 Saloon?

The Mazda 6 Saloon is available as Rear-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.