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Audi A6 Avant vs Mercedes S Class comparison

Compare performance (367 HP vs 635 HP), boot space and price (49,700 £ vs 104,000 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Avant or Mercedes S Class?

Audi A6 Avant vs Mercedes S Class: Key differences

Audi A6 Avant

  • substantially cheaper
  • somewhat lighter
details

Mercedes S Class

  • significantly more power
  • marginally more efficient
  • somewhat more electric range
  • somewhat quicker 0–100 km/h
details

By Achim Sedelmaier

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

A6 Avant

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Audi A6 Avant is substantially cheaper – starting at 49,700 £ , while the Mercedes S Class costs 104,000 £ . That’s a price difference of around 54,305 £.

Fuel consumption also shows a difference: the Mercedes S Class uses 2.2 L/100km and is marginally more efficient than the Audi A6 Avant with 2.3 L/100km. The difference is about 0.1 L/100km.

As for electric range, the Mercedes S Class offers somewhat more range – reaching up to 118 km, about 17 km more than the Audi A6 Avant.

S Class

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 S Class offers significantly more power – delivering 635 HP compared to 367 HP. That’s roughly 268 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes S Class is somewhat quicker – completing the sprint in 4 s, while the Audi A6 Avant takes 4.7 s. That’s about 0.7 s quicker.

There’s also a difference in torque: the Mercedes S Class delivers noticeably more torque with 850 Nm compared to 580 Nm. That’s about 270 Nm more.

A6 Avant

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 A6 Avant is somewhat lighter – 1,865 kg compared to 2,165 kg. The difference is around 300 kg.

When it comes to payload, the Mercedes S Class carries a bit more – 660 kg compared to 570 kg. That’s a difference of about 90 kg.

Who wins the race in the data check?

The Mercedes S Class is far ahead 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 £104,000
S Class

Mercedes S Class

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive, Rear-Wheel Drive
  • Power HP : 336 - 635 HP
  • Consumption L/100km : 2.2 - 11 L/100km
  • Electric Range : 98 - 118 km
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Frequently compared as well

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A6 Avant

The Audi A6 Avant wraps executive poise and usable practicality into an impeccably finished estate that makes everyday driving feel noticeably more grown-up. It serves up a calm, composed ride and clever packaging for buyers who want space and refinement without ostentation — the sensible choice that still manages to impress.

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Reviews Audi A6 Avant

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Mercedes S Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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Reviews Mercedes S Class

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Audi A6 Avant
Mercedes S Class

Costs and Consumption
Price
49,700 - 70,200 £
Price
104,000 - 201,400 £
Consumption L/100km
2.3 - 7.5 L/100km
Consumption L/100km
2.2 - 11 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
98 - 118 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 170 g/km
co2
50 - 252 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,865 - 2,240 kg
Curb weight
2,165 - 2,650 kg
Trunk capacity
404 - 503 L
Trunk capacity
-
Length
-
Length
-
Width
1,875 mm
Width
1,921 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 570 kg
Payload
420 - 660 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Power HP
204 - 367 HP
Power HP
336 - 635 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
4 - 5.7 s
Max Speed
-
Max Speed
-
Torque
340 - 580 Nm
Torque
560 - 850 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6 - 8
Power kW
150 - 270 kW
Power kW
247 - 467 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
G, B, F
Brand
Audi
Brand
Mercedes-Benz
Is the Audi A6 Avant offered with different drivetrains?

The Audi A6 Avant is offered with 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.