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Audi A6 Avant vs Mercedes C Class Sedan 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 Sedan?

Audi A6 Avant vs Mercedes C Class Sedan: Key differences

Audi A6 Avant

  • marginally more trunk space

Mercedes C Class Sedan

  • noticeably cheaper
  • substantially more power
  • substantially more efficient
  • somewhat more electric range
  • clearly quicker 0–100 km/h
  • slightly lighter

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 Sedan 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 Mercedes C Class Sedan uses 1.6 L/100km and is substantially more efficient than the Audi A6 Avant with 2.3 L/100km. The difference is about 0.7 L/100km.

As for electric range, the Mercedes C Class Sedan offers somewhat more range – reaching up to 117 km, about 16 km more than the Audi A6 Avant.

C Class Sedan

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 Sedan 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 Sedan 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 no difference in top speed – both reach 250 km/h.

There’s also a difference in torque: the Mercedes C Class Sedan 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 Sedan 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 Mercedes C Class Sedan 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 £41,300
C Class Sedan

Mercedes C Class Sedan

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 183 - 680 HP
  • Consumption L/100km : 1.6 - 9 L/100km
  • Electric Range : 11 - 117 km
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Costs and Consumption
View detailed analysis

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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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Mercedes C Class Sedan

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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Audi A6 Avant
Mercedes C Class Sedan

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
1.6 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
11 - 117 km
Battery Capacity
-
Battery Capacity
19.5 kWh
co2
53 - 170 g/km
co2
41 - 205 g/km
Fuel tank capacity
56 - 60 L
Fuel tank capacity
50 L

Dimensions and Body
Body Type
Estate
Body Type
Sedan
Seats
5
Seats
5
Doors
5
Doors
4
Curb weight
1,865 - 2,240 kg
Curb weight
1,695 - 2,195 kg
Trunk capacity
404 - 503 L
Trunk capacity
315 - 455 L
Length
4,999 mm
Length
4,751 mm
Width
1,875 mm
Width
1,820 - 1,900 mm
Height
1,472 mm
Height
1,438 mm
Max trunk capacity
1,497 - 1,534 L
Max trunk capacity
-
Payload
535 - 570 kg
Payload
480 - 570 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
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
238 - 250 km/h
Max Speed
235 - 250 km/h
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
2,025
Model Year
2,024 - 2,025
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
E, B, 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.