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Mercedes CLA Coupe vs Audi A3 Sportback comparison

Compare performance (354 HP vs 400 HP), boot space and price (39,600 £ vs 27,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes CLA Coupe or Audi A3 Sportback?

Mercedes CLA Coupe vs Audi A3 Sportback: Key differences

Mercedes CLA Coupe

4.8 (2 Reviews)
rate
  • clearly more electric range
  • marginally more trunk space

Audi A3 Sportback

3.9 (1 Reviews)
rate
  • considerably cheaper
  • slightly more power
  • considerably more efficient
  • visibly quicker 0–100 km/h
  • clearly lighter

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

CLA Coupe

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 Sportback is considerably cheaper – starting at 27,000 £ , while the Mercedes CLA Coupe costs 39,600 £ . That’s a price difference of around 12,636 £.

Fuel consumption also shows a difference: the Audi A3 Sportback uses 1.1 L/100km and is considerably more efficient than the Mercedes CLA Coupe with 4.9 L/100km. The difference is about 3.8 L/100km.

As for electric range, the Mercedes CLA Coupe offers clearly more range – reaching up to 791 km, about 650 km more than the Audi A3 Sportback.

A3 Sportback

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 Audi A3 Sportback offers slightly more power – delivering 400 HP compared to 354 HP. That’s roughly 46 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Sportback is visibly quicker – completing the sprint in 3.8 s, while the Mercedes CLA Coupe takes 4.9 s. That’s about 1.1 s quicker.

Looking at top speed, the Audi A3 Sportback is slightly faster – reaching 237 km/h, while the Mercedes CLA Coupe tops out at 210 km/h. The difference is around 27 km/h.

There’s also a difference in torque: the Mercedes CLA Coupe delivers barely more torque with 515 Nm compared to 500 Nm. That’s about 15 Nm more.

CLA Coupe

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

Looking at boot space, the Mercedes CLA Coupe offers marginally more boot space – 405 L compared to 380 L. That’s a difference of about 25 L.

When it comes to payload, the Audi A3 Sportback carries only slightly more – 480 kg compared to 455 kg. That’s a difference of about 25 kg.

Who wins the race in the data check?

The Audi A3 Sportback 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 £27,000
A3 Sportback

Audi A3 Sportback

  • Engine Type : Petrol, Petrol MHEV, Diesel, Plugin Hybrid
  • Transmission : Manuel, Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 400 HP
  • Consumption L/100km : 1.1 - 9.3 L/100km
  • Electric Range : 134 - 141 km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes CLA Coupe

The Mercedes CLA Coupe cuts a rakish silhouette that blends sporty coupe lines with everyday practicality, giving style-minded buyers a premium image without shouting. Inside it feels more luxurious than its size suggests, with a slick cabin, intuitive tech and a composed ride — the kind of car that parties in the city and still shows up polished on Sunday morning.

details
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Reviews Mercedes CLA Coupe

4.8 (2 Reviews)
rate
marco
12 Mar 2026, 18:44:45

A car with a unique line — the shooting brake finally gets a sporty rear and a roomy trunk.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Dejf
18 Dec 2025, 14:59:40

Nice efficient car. Like it

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

Audi A3 Sportback

The Audi A3 Sportback wraps premium materials and crisp German design into a practical hatchback package that makes daily driving feel smart rather than showy. It’s nimble in the city, composed on longer trips, and carries just enough swagger to satisfy buyers who want quality without shouting about it.

details
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A202258_overfull
A202235_overfull
A202271_overfull
A201906_overfull
A202227_overfull

Reviews Audi A3 Sportback

3.9 (1 Reviews)
rate

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

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Mercedes CLA Coupe
Audi A3 Sportback

Costs and Consumption
Price
39,600 - 59,300 £
Price
27,000 - 56,600 £
Consumption L/100km
4.9 - 5.3 L/100km
Consumption L/100km
1.1 - 9.3 L/100km
Consumption kWh/100km
12.2 - 12.6 kWh/100km
Consumption kWh/100km
-
Electric Range
541 - 791 km
Electric Range
134 - 141 km
Battery Capacity
58 kWh
Battery Capacity
19.7 kWh
co2
0 - 120 g/km
co2
25 - 211 g/km
Fuel tank capacity
-
Fuel tank capacity
40 L

Dimensions and Body
Body Type
Coupe
Body Type
Hatchback
Seats
5
Seats
5
Doors
4
Doors
5
Curb weight
1,695 - 2,135 kg
Curb weight
1,360 - 1,685 kg
Trunk capacity
405 L
Trunk capacity
280 - 380 L
Length
4,723 mm
Length
4,352 - 4,353 mm
Width
1,855 mm
Width
1,816 - 1,851 mm
Height
1,468 mm
Height
1,441 - 1,470 mm
Max trunk capacity
-
Max trunk capacity
1,100 L
Payload
430 - 455 kg
Payload
410 - 480 kg

Engine and Performance
Engine Type
Electric, Petrol MHEV
Engine Type
Petrol, Petrol MHEV, Diesel, Plugin Hybrid
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Reduction Gearbox, Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
156 - 354 HP
Power HP
116 - 400 HP
Acceleration 0-100km/h
4.9 - 8.8 s
Acceleration 0-100km/h
3.8 - 10.1 s
Max Speed
210 km/h
Max Speed
225 - 237 km/h
Torque
280 - 515 Nm
Torque
220 - 500 Nm
Number of Cylinders
4
Number of Cylinders
4 - 5
Power kW
115 - 260 kW
Power kW
85 - 294 kW
Engine capacity
1,499 cm3
Engine capacity
1,498 - 2,480 cm3

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

The Mercedes CLA Coupe is available as Rear-Wheel Drive, All-Wheel Drive or Front-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.