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Audi A3 Limousine vs Mercedes C-Class Saloon comparison

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

Audi A3 Limousine vs Mercedes C-Class Saloon: Key differences

Audi A3 Limousine

  • clearly cheaper
  • only slightly more efficient
  • visibly lighter
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Mercedes C-Class Saloon

  • significantly more power
  • moderately quicker 0–100 km/h
  • very slightly more trunk space
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By Achim Sedelmaier

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

A3 Limousine

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

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

Fuel consumption also shows a difference: the Audi A3 Limousine uses 4.4 L/100km and is only slightly more efficient than the Mercedes C-Class Saloon with 4.5 L/100km. The difference is about 0.1 L/100km.

C-Class Saloon

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 Saloon offers significantly 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 Saloon is moderately 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 Saloon delivers substantially more torque with 1,020 Nm compared to 500 Nm. That’s about 520 Nm more.

A3 Limousine

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

Looking at boot space, the Mercedes C-Class Saloon 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 Saloon carries slightly 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 Saloon comes out clearly 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 £41,300
C-Class Saloon

Mercedes C-Class Saloon

  • Engine Type Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 183 - 680 HP
  • Consumption L/100km 4.5 - 9 L/100km
  • Electric Range 11 km
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Costs and Consumption
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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 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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Audi A3 Limousine
Mercedes C-Class Saloon

Costs and Consumption
Price
27,700 - 94,300 £
Price
41,300 - 103,400 £
Consumption L/100km
4.4 - 9.2 L/100km
Consumption L/100km
4.5 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
11 km
Battery Capacity
-
Battery Capacity
-
co2
115 - 208 g/km
co2
119 - 205 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,360 - 1,640 kg
Curb weight
1,695 - 2,165 kg
Trunk capacity
321 - 425 L
Trunk capacity
280 - 455 L
Length
-
Length
-
Width
1,816 - 1,851 mm
Width
1,820 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
415 - 480 kg
Payload
485 - 570 kg

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

General
Model Year
2,025 - 2,026
Model Year
2,024 - 2,025
CO2 Efficiency Class
D, C, E, G
CO2 Efficiency Class
E, D, G
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A3 Limousine?

The Audi A3 Limousine is available as 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.