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Mercedes C Class Sedan vs Audi A3 Limousine comparison

Compare performance (680 HP vs 400 HP), boot space and price (41,300 £ vs 27,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes C Class Sedan or Audi A3 Limousine?

Mercedes C Class Sedan vs Audi A3 Limousine: Key differences

Mercedes C Class Sedan

  • clearly more power
  • clearly more efficient
  • slightly quicker 0–100 km/h
  • very slightly more trunk space

Audi A3 Limousine

  • considerably cheaper
  • clearly lighter

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

C Class Sedan

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 A3 Limousine is considerably cheaper – starting at 27,700 £ , while the Mercedes C Class Sedan costs 41,300 £ . That’s a price difference of around 13,640 £.

Fuel consumption also shows a difference: the Mercedes C Class Sedan uses 1.6 L/100km and is clearly more efficient than the Audi A3 Limousine with 4.4 L/100km. The difference is about 2.8 L/100km.

A3 Limousine

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 Mercedes C Class Sedan offers clearly more power – delivering 680 HP compared to 400 HP. That’s roughly 280 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes C Class Sedan is slightly quicker – completing the sprint in 3.4 s, while the Audi A3 Limousine takes 3.8 s. That’s about 0.4 s quicker.

There’s also a difference in torque: the Mercedes C Class Sedan delivers considerably more torque with 1,020 Nm compared to 500 Nm. That’s about 520 Nm more.

C Class Sedan

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 A3 Limousine is clearly lighter – 1,360 kg compared to 1,695 kg. The difference is around 335 kg.

Looking at boot space, the Mercedes C Class Sedan offers very slightly more boot space – 455 L compared to 425 L. That’s a difference of about 30 L.

When it comes to payload, the Mercedes C Class Sedan carries a bit more – 570 kg compared to 480 kg. That’s a difference of about 90 kg.

Who wins the race in the data check?

The Mercedes C Class Sedan holds a decisive overall lead 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

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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 A3 Limousine

The Audi A3 sedan dresses up compact practicality in clean, premium lines, giving you the feel of an upscale small car with a proper boot. Inside it’s neat, driver-focused and nicely finished — a sensible, enjoyable daily companion that prefers poise over showy theatrics.

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Mercedes C Class Sedan
Audi A3 Limousine

Costs and Consumption
Price
41,300 - 103,400 £
Price
27,700 - 58,300 £
Consumption L/100km
1.6 - 9 L/100km
Consumption L/100km
4.4 - 9.2 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
11 - 117 km
Electric Range
-
Battery Capacity
19.5 kWh
Battery Capacity
-
co2
41 - 205 g/km
co2
115 - 208 g/km
Fuel tank capacity
50 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Sedan
Seats
5
Seats
5
Doors
4
Doors
-
Curb weight
1,695 - 2,195 kg
Curb weight
1,360 - 1,640 kg
Trunk capacity
315 - 455 L
Trunk capacity
321 - 425 L
Length
4,751 mm
Length
-
Width
1,820 - 1,900 mm
Width
1,816 - 1,851 mm
Height
1,438 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 570 kg
Payload
415 - 480 kg

Engine and Performance
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Engine Type
Petrol, Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
183 - 680 HP
Power HP
116 - 400 HP
Acceleration 0-100km/h
3.4 - 8.6 s
Acceleration 0-100km/h
3.8 - 10.1 s
Max Speed
235 - 250 km/h
Max Speed
-
Torque
250 - 1,020 Nm
Torque
220 - 500 Nm
Number of Cylinders
4
Number of Cylinders
4 - 5
Power kW
135 - 500 kW
Power kW
85 - 294 kW
Engine capacity
1,496 - 1,999 cm3
Engine capacity
1,498 - 2,480 cm3

General
Model Year
2,024 - 2,025
Model Year
2,025
CO2 Efficiency Class
E, B, D, G
CO2 Efficiency Class
D, C, E, G
Brand
Mercedes-Benz
Brand
Audi
What drivetrain options does the Mercedes C Class Sedan have?

The Mercedes C Class Sedan is available as Rear-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.