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Kia Stonic vs Mercedes CLA Coupe comparison

Compare performance (115 HP vs 354 HP), boot space and price (20,400 £ vs 39,600 £ ) at a glance. Find out which car is the better choice for you – Kia Stonic or Mercedes CLA Coupe?

Kia Stonic vs Mercedes CLA Coupe: Key differences

Kia Stonic

4.7 (3 Reviews)
rate
  • substantially cheaper
  • clearly lighter
details

Mercedes CLA Coupe

4.8 (2 Reviews)
rate
  • clearly more power
  • moderately more efficient
  • considerably quicker 0–100 km/h
  • a bit more trunk space
details

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

Stonic

Costs and Efficiency:

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

Kia Stonic is substantially cheaper – starting at 20,400 £ , while the Mercedes CLA Coupe costs 39,600 £ . That’s a price difference of around 19,245 £.

Fuel consumption also shows a difference: the Mercedes CLA Coupe uses 4.9 L/100km and is moderately more efficient than the Kia Stonic with 5.6 L/100km. The difference is about 0.7 L/100km.

CLA Coupe

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 Mercedes CLA Coupe offers clearly more power – delivering 354 HP compared to 115 HP. That’s roughly 239 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes CLA Coupe is considerably quicker – completing the sprint in 4.9 s, while the Kia Stonic takes 10.7 s. That’s about 5.8 s quicker.

There’s also a difference in torque: the Mercedes CLA Coupe delivers clearly more torque with 515 Nm compared to 200 Nm. That’s about 315 Nm more.

Stonic

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, Kia Stonic is clearly lighter – 1,205 kg compared to 1,695 kg. The difference is around 490 kg.

Looking at boot space, the Mercedes CLA Coupe offers a bit more boot space – 405 L compared to 352 L. That’s a difference of about 53 L.

When it comes to payload, the Mercedes CLA Coupe carries only slightly more – 455 kg compared to 445 kg. That’s a difference of about 10 kg.

Who wins the race in the data check?

The Mercedes CLA Coupe is far ahead overall 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 £39,600
CLA Coupe

Mercedes CLA Coupe

  • Engine Type Electric, Full Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive
  • Power HP 156 - 354 HP
  • Consumption L/100km 4.9 - 5.3 L/100km
  • Consumption kWh/100km 12.3 - 12.7 kWh/100km
  • Electric Range 542 - 792 km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Kia Stonic

The Kia Stonic is a compact crossover that pairs nimble city manners with a surprisingly spacious and comfortable cabin. It’s a practical, well-equipped choice for buyers who value sensible features, approachable styling and easy everyday usability.

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Reviews Kia Stonic

4.7 (3 Reviews)
rate
Jan
18 Mar 2026, 07:19:10

Very good car, uses little fuel, nothing's gone wrong in 4 years, no breakdowns.

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
Ennio
4 Feb 2026, 13:19:36

I'm very satisfied — I have a Stonic Black Edition hybrid, and I haven't had any problems after two years.

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

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
19C0225_069
19C0225_068
19C0225_067
19C0225_044

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

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Kia Stonic
Mercedes CLA Coupe

Costs and Consumption
Price
20,400 - 26,800 £
Price
39,600 - 60,000 £
Consumption L/100km
5.6 - 5.7 L/100km
Consumption L/100km
4.9 - 5.3 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
12.3 - 12.7 kWh/100km
Electric Range
-
Electric Range
542 - 792 km
Battery Capacity
-
Battery Capacity
-
co2
126 - 128 g/km
co2
0 - 120 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Coupe
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,205 - 1,270 kg
Curb weight
1,695 - 2,135 kg
Trunk capacity
352 L
Trunk capacity
405 L
Length
-
Length
-
Width
1,760 mm
Width
1,855 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
440 - 445 kg
Payload
430 - 455 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
Engine Type
Electric, Full Hybrid
Transmission
Manual, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Reduction Gearbox, Dual-Clutch Automatic
Drive Type
Front-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive
Power HP
100 - 115 HP
Power HP
156 - 354 HP
Acceleration 0-100km/h
10.7 - 12.1 s
Acceleration 0-100km/h
4.9 - 8.8 s
Max Speed
-
Max Speed
-
Torque
172 - 200 Nm
Torque
280 - 515 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
74 - 85 kW
Power kW
115 - 260 kW
Engine capacity
998 cm3
Engine capacity
1,499 cm3

General
Model Year
2025
Model Year
2,025 - 2,026
CO2 Efficiency Class
D
CO2 Efficiency Class
A, C, D
Brand
Kia
Brand
Mercedes-Benz
Is the Kia Stonic offered with different drivetrains?

The Kia Stonic is offered with 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.