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Audi A6 Avant vs Mercedes C-Class Saloon comparison

Compare performance (367 HP vs 680 HP), boot space and price (49,700 £ vs 41,300 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Avant or Mercedes C-Class Saloon?

Audi A6 Avant vs Mercedes C-Class Saloon: Key differences

Audi A6 Avant

  • substantially more efficient
  • significantly more electric range
  • marginally more trunk space
details

Mercedes C-Class Saloon

  • noticeably cheaper
  • substantially more power
  • clearly quicker 0–100 km/h
  • slightly lighter
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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.

Mercedes C-Class Saloon is noticeably cheaper – starting at 41,300 £ , while the Audi A6 Avant costs 49,700 £ . That’s a price difference of around 8,389 £.

Fuel consumption also shows a difference: the Audi A6 Avant uses 2.3 L/100km and is substantially more efficient than the Mercedes C-Class Saloon with 4.5 L/100km. The difference is about 2.2 L/100km.

As for electric range, the Audi A6 Avant offers significantly more range – reaching up to 101 km, about 90 km more than the Mercedes C-Class Saloon.

C-Class Saloon

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Mercedes C-Class Saloon offers substantially more power – delivering 680 HP compared to 367 HP. That’s roughly 313 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes C-Class Saloon is clearly quicker – completing the sprint in 3.4 s, while the Audi A6 Avant takes 4.7 s. That’s about 1.3 s quicker.

There’s also a difference in torque: the Mercedes C-Class Saloon delivers considerably more torque with 1,020 Nm compared to 580 Nm. That’s about 440 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, Mercedes C-Class Saloon is slightly lighter – 1,695 kg compared to 1,865 kg. The difference is around 170 kg.

Looking at boot space, the Audi A6 Avant offers marginally more boot space – 503 L compared to 455 L. That’s a difference of about 48 L.

Maximum payload is identical – both can carry up to 570 kg.

Who wins the race in the data check?

The Audi A6 Avant stands well ahead of its rival 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 £49,700
A6 Avant

Audi A6 Avant

  • Engine Type Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 204 - 367 HP
  • Consumption L/100km 2.3 - 7.5 L/100km
  • Electric Range 94 - 101 km
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Mercedes C-Class Saloon

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 C-Class Saloon

The Mercedes C‑Class is the compact executive that dresses like it owns the boulevard, with an interior that blends modern elegance and plush comfort to make everyday driving feel unexpectedly special. On the road it pairs poise with a hint of cheeky agility, rewarding drivers who want refinement without forfeiting a touch of fun — and yes, it still looks great in the driveway.

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Reviews Mercedes C-Class Saloon

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Audi A6 Avant
Mercedes C-Class Saloon

Costs and Consumption
Price
49,700 - 70,200 £
Price
41,300 - 103,400 £
Consumption L/100km
2.3 - 7.5 L/100km
Consumption L/100km
4.5 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
11 km
Battery Capacity
-
Battery Capacity
-
co2
53 - 170 g/km
co2
119 - 205 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
1,695 - 2,165 kg
Trunk capacity
404 - 503 L
Trunk capacity
280 - 455 L
Length
-
Length
-
Width
1,875 mm
Width
1,820 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
535 - 570 kg
Payload
485 - 570 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
204 - 367 HP
Power HP
183 - 680 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
3.4 - 8.6 s
Max Speed
-
Max Speed
-
Torque
340 - 580 Nm
Torque
250 - 1,020 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
135 - 500 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,496 - 1,999 cm3

General
Model Year
2025
Model Year
2,024 - 2,025
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
E, D, G
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.