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Audi A6 e-tron Avant vs Mercedes C Class EQ comparison

Compare performance (551 HP vs 489 HP), boot space and price (55,200 £ vs 58,000 £ ) at a glance. Find out which car is the better choice for you – Audi A6 e-tron Avant or Mercedes C Class EQ?

Audi A6 e-tron Avant vs Mercedes C Class EQ: Key differences

Audi A6 e-tron Avant

3.4 (3 Reviews)
rate
  • very slightly cheaper
  • somewhat more power
  • barely quicker 0–100 km/h
  • a bit lighter
  • barely more trunk space
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Mercedes C Class EQ

  • very slightly more efficient
  • barely more electric range
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By Achim Sedelmaier

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

A6 e-tron 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 e-tron Avant is very slightly cheaper – starting at 55,200 £ , while the Mercedes C Class EQ costs 58,000 £ . That’s a price difference of around 2,796 £.

In terms of energy consumption, the Mercedes C Class EQ is very slightly more efficient: consuming 14.3 kWh/100km compared to 14.8 kWh/100km for the Audi A6 e-tron Avant. That’s a difference of about 0.5 kWh/100km.

As for electric range, the Mercedes C Class EQ offers barely more range – reaching up to 753 km, about 37 km more than the Audi A6 e-tron Avant.

C Class EQ

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 A6 e-tron Avant offers somewhat more power – delivering 551 HP compared to 489 HP. That’s roughly 62 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A6 e-tron Avant is barely quicker – completing the sprint in 3.9 s, while the Mercedes C Class EQ takes 4 s. That’s about 0.1 s quicker.

There’s also a difference in torque: the Audi A6 e-tron Avant delivers barely more torque with 855 Nm compared to 800 Nm. That’s about 55 Nm more.

A6 e-tron Avant

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Both vehicles offer seating for 5 people.

In terms of curb weight, Audi A6 e-tron Avant is a bit lighter – 2,185 kg compared to 2,460 kg. The difference is around 275 kg.

Looking at boot space, the Audi A6 e-tron Avant offers barely more boot space – 502 L compared to 470 L. That’s a difference of about 32 L.

When it comes to payload, the Mercedes C Class EQ carries very slightly more – 505 kg compared to 500 kg. That’s a difference of about 5 kg.

Who wins the race in the data check?

The Audi A6 e-tron Avant leads convincingly 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 £55,200
A6 e-tron Avant

Audi A6 e-tron Avant

  • Engine Type : Electric
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 326 - 551 HP
  • Consumption kWh/100km : 14.8 - 17 kWh/100km
  • Electric Range : 539 - 716 km
Audi A6 e-tron Avant
Mercedes C Class EQ

Costs and Consumption

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Engine and Performance

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Dimensions and Body

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Audi A6 e-tron Avant

The Audi A6 e-tron Avant wraps Audi's trademark refinement into a sleek electric estate that looks at home in the city or on the open road. Inside it's grown-up and tech-forward with practical packaging for family life, delivering a composed, confident drive that makes everyday hauling feel a bit more special and slightly futuristic.

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Mercedes C Class EQ

The Mercedes C‑Class EQ blends the familiar poise and luxury of the C‑Class with Mercedes' EQ electric ethos, delivering a quietly refined and modern driving experience. Inside, it pairs upscale materials and tech-forward touches with a composed ride that suits both city commuting and longer journeys.

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Audi A6 e-tron Avant
Mercedes C Class EQ

Costs and Consumption

Price
55,200 - 100,100 £
Price
58,000 - 67,600 £
Consumption L/100km
-
Consumption L/100km
-
Consumption kWh/100km
14.8 - 17 kWh/100km
Consumption kWh/100km
14.3 - 15.6 kWh/100km
Electric Range
539 - 716 km
Electric Range
706 - 753 km
Battery Capacity
75.8 - 94.9 kWh
Battery Capacity
-
co2
0 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body

Body Type
Estate
Body Type
Sedan
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
2,185 - 2,410 kg
Curb weight
2,460 kg
Trunk capacity
502 L
Trunk capacity
470 L
Length
4,928 mm
Length
-
Width
1,923 mm
Width
1,892 mm
Height
1,504 - 1,527 mm
Height
-
Max trunk capacity
1,422 L
Max trunk capacity
-
Payload
470 - 500 kg
Payload
505 kg

Engine and Performance

Engine Type
Electric
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
326 - 551 HP
Power HP
489 HP
Acceleration 0-100km/h
3.9 - 6 s
Acceleration 0-100km/h
4 s
Max Speed
210 - 240 km/h
Max Speed
-
Torque
435 - 855 Nm
Torque
800 Nm
Number of Cylinders
-
Number of Cylinders
-
Power kW
240 - 405 kW
Power kW
360 kW
Engine capacity
-
Engine capacity
-

General

Model Year
2024
Model Year
2026
CO2 Efficiency Class
A
CO2 Efficiency Class
A
Brand
Audi
Brand
Mercedes-Benz
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.