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Kia Stonic vs Mercedes C-Class Saloon comparison

Compare performance (115 HP vs 680 HP), boot space and price (20,400 £ vs 41,300 £ ) at a glance. Find out which car is the better choice for you – Kia Stonic or Mercedes C-Class Saloon?

Kia Stonic vs Mercedes C-Class Saloon: Key differences

Kia Stonic

4.6 (2 Reviews)
rate
  • significantly cheaper
  • considerably lighter
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Mercedes C-Class Saloon

  • clearly more power
  • visibly more efficient
  • significantly quicker 0–100 km/h
  • clearly 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

Stonic

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

Kia Stonic is significantly cheaper – starting at 20,400 £ , while the Mercedes C-Class Saloon costs 41,300 £ . That’s a price difference of around 20,934 £.

Fuel consumption also shows a difference: the Mercedes C-Class Saloon uses 4.5 L/100km and is visibly more efficient than the Kia Stonic with 5.6 L/100km. The difference is about 1.1 L/100km.

C-Class Saloon

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 C-Class Saloon offers clearly more power – delivering 680 HP compared to 115 HP. That’s roughly 565 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes C-Class Saloon is significantly quicker – completing the sprint in 3.4 s, while the Kia Stonic takes 10.7 s. That’s about 7.3 s quicker.

There’s also a difference in torque: the Mercedes C-Class Saloon delivers clearly more torque with 1,020 Nm compared to 200 Nm. That’s about 820 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 considerably lighter – 1,205 kg compared to 1,695 kg. The difference is around 490 kg.

Looking at boot space, the Mercedes C-Class Saloon offers clearly more boot space – 455 L compared to 352 L. That’s a difference of about 103 L.

When it comes to payload, the Mercedes C-Class Saloon carries markedly more – 570 kg compared to 445 kg. That’s a difference of about 125 kg.

Who wins the race in the data check?

The Mercedes C-Class Saloon stands well ahead of its rival 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
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

4.6 (2 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 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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Reviews Mercedes C-Class Saloon

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

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Mercedes C-Class Saloon

Costs and Consumption
Price
20,400 - 26,800 £
Price
41,300 - 103,400 £
Consumption L/100km
5.6 - 5.7 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
126 - 128 g/km
co2
119 - 205 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,205 - 1,270 kg
Curb weight
1,695 - 2,165 kg
Trunk capacity
352 L
Trunk capacity
455 L
Length
-
Length
-
Width
1,760 mm
Width
1,820 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
440 - 445 kg
Payload
485 - 570 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
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
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
100 - 115 HP
Power HP
183 - 680 HP
Acceleration 0-100km/h
10.7 - 12.1 s
Acceleration 0-100km/h
3.4 - 8.6 s
Max Speed
-
Max Speed
-
Torque
172 - 200 Nm
Torque
250 - 1,020 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
74 - 85 kW
Power kW
135 - 500 kW
Engine capacity
998 cm3
Engine capacity
1,496 - 1,999 cm3

General
Model Year
2025
Model Year
2,024 - 2,025
CO2 Efficiency Class
D
CO2 Efficiency Class
E, D, G
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.