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Audi A6 Limousine vs Mercedes GLC comparison

Compare performance (367 HP vs 680 HP), boot space and price (47,600 £ vs 50,300 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Limousine or Mercedes GLC?

Audi A6 Limousine vs Mercedes GLC: Key differences

Audi A6 Limousine

  • only slightly cheaper
  • very slightly lighter
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Mercedes GLC

4.4 (11 Reviews)
rate
  • considerably more power
  • markedly more efficient
  • significantly more electric range
  • markedly quicker 0–100 km/h
  • markedly more trunk space
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All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

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

A6 Limousine

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 Limousine is only slightly cheaper – starting at 47,600 £ , while the Mercedes GLC costs 50,300 £ . That’s a price difference of around 2,756 £.

Fuel consumption also shows a difference: the Mercedes GLC uses 1.6 L/100km and is markedly more efficient than the Audi A6 Limousine with 2.2 L/100km. The difference is about 0.6 L/100km.

As for electric range, the Mercedes GLC offers significantly more range – reaching up to 714 km, about 609 km more than the Audi A6 Limousine.

GLC

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 GLC offers considerably 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 GLC is markedly quicker – completing the sprint in 3.5 s, while the Audi A6 Limousine takes 4.7 s. That’s about 1.2 s quicker.

There’s also a difference in torque: the Mercedes GLC delivers considerably more torque with 1,020 Nm compared to 580 Nm. That’s about 440 Nm more.

A6 Limousine

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 5 people.

In terms of curb weight, Audi A6 Limousine is very slightly lighter – 1,845 kg compared to 1,985 kg. The difference is around 140 kg.

Looking at boot space, the Mercedes GLC offers markedly more boot space – 620 L compared to 492 L. That’s a difference of about 128 L.

When it comes to payload, the Audi A6 Limousine carries very slightly more – 625 kg compared to 575 kg. That’s a difference of about 50 kg.

Who wins the race in the data check?

The Mercedes GLC is decisively 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 £50,300
GLC

Mercedes GLC

  • Engine Type : Diesel MHEV, Plugin Hybrid, Electric
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 186 - 680 HP
  • Consumption L/100km : 1.6 - 9.7 L/100km
  • Consumption kWh/100km : 14.9 - 16.6 kWh/100km
  • Electric Range : 12 - 714 km
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Frequently compared as well

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Audi A6 Limousine
Mercedes GLC

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A6 Limousine

The Audi A6 cuts a clean, purposeful silhouette with an interior that feels like a quiet, high-tech office on wheels—luxurious materials and clever gadgets make long journeys surprisingly pleasant. It balances composed, confident driving with enough flair to keep you entertained, making it a sensible choice for buyers who want executive polish without showing off.

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Reviews Audi A6 Limousine

No reviews yet. Share your experience and help others decide.

Mercedes GLC

The Mercedes GLC blends plush cabin comfort and composed road manners into an SUV that feels more grown-up than it looks. It won’t shout for attention, but will quietly please buyers who want refinement, usable space and a touch of luxury without the drama.

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Reviews Mercedes GLC

4.4 (11 Reviews)
rate
Marek
2 Jan 2026, 18:32:30

There’s something about a Mercedes — you have to take it for a spin to feel it and understand why it’s special.

How do you mainly use this car? (optional): Commuter (short/medium distance)
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Audi A6 Limousine
Mercedes GLC

Costs and Consumption
Price
47,600 - 68,100 £
Price
50,300 - 111,000 £
Consumption L/100km
2.2 - 7.3 L/100km
Consumption L/100km
1.6 - 9.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
14.9 - 16.6 kWh/100km
Electric Range
97 - 105 km
Electric Range
12 - 714 km
Battery Capacity
-
Battery Capacity
94 kWh
co2
49 - 166 g/km
co2
0 - 221 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1,845 - 2,220 kg
Curb weight
1,985 - 2,535 kg
Trunk capacity
354 - 492 L
Trunk capacity
390 - 620 L
Length
-
Length
4,845 mm
Width
1,875 mm
Width
1,890 - 1,913 mm
Height
-
Height
1,644 mm
Max trunk capacity
-
Max trunk capacity
1,740 L
Payload
535 - 625 kg
Payload
475 - 575 kg

Engine and Performance
Engine Type
Petrol, Diesel MHEV, Petrol MHEV, Plugin Hybrid
Engine Type
Diesel MHEV, Plugin Hybrid, Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox, Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
204 - 367 HP
Power HP
186 - 680 HP
Acceleration 0-100km/h
4.7 - 8.2 s
Acceleration 0-100km/h
3.5 - 9 s
Max Speed
-
Max Speed
210 km/h
Torque
340 - 580 Nm
Torque
380 - 1,020 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4 - 6
Power kW
150 - 270 kW
Power kW
137 - 500 kW
Engine capacity
1,968 - 2,995 cm3
Engine capacity
1,991 - 2,989 cm3

General
Model Year
2025
Model Year
2,025 - 2,026
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
D, B, E, F, G, A
Brand
Audi
Brand
Mercedes-Benz
What drivetrain options does the Audi A6 Limousine have?

Available configurations include 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.