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Kia Stonic vs Mercedes A Class comparison

Compare performance (115 HP vs 421 HP), boot space and price (20,400 £ vs 32,600 £ ) at a glance. Find out which car is the better choice for you – Kia Stonic or Mercedes A Class?

Kia Stonic vs Mercedes A Class: Key differences

Kia Stonic

4.6 (2 Reviews)
rate
  • substantially cheaper
  • moderately lighter
  • very slightly more trunk space
details

Mercedes A Class

2.7 (1 Reviews)
rate
  • considerably more power
  • considerably more efficient
  • considerably quicker 0–100 km/h
details

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 substantially cheaper – starting at 20,400 £ , while the Mercedes A Class costs 32,600 £ . That’s a price difference of around 12,177 £.

Fuel consumption also shows a difference: the Mercedes A Class uses 2.3 L/100km and is considerably more efficient than the Kia Stonic with 5.6 L/100km. The difference is about 3.3 L/100km.

A Class

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 A Class offers considerably more power – delivering 421 HP compared to 115 HP. That’s roughly 306 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes A Class is considerably quicker – completing the sprint in 3.9 s, while the Kia Stonic takes 10.7 s. That’s about 6.8 s quicker.

There’s also a difference in torque: the Mercedes A Class delivers substantially more torque with 500 Nm compared to 200 Nm. That’s about 300 Nm more.

Stonic

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, Kia Stonic is moderately lighter – 1,205 kg compared to 1,440 kg. The difference is around 235 kg.

Looking at boot space, the Kia Stonic offers very slightly more boot space – 352 L compared to 350 L. That’s a difference of about 2 L.

When it comes to payload, the Mercedes A Class carries barely more – 485 kg compared to 445 kg. That’s a difference of about 40 kg.

Who wins the race in the data check?

The Mercedes A Class 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 £32,600
A Class

Mercedes A Class

  • Engine Type : Petrol MHEV, Diesel, Plugin Hybrid, Petrol
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 421 HP
  • Consumption L/100km : 2.3 - 9 L/100km
  • Electric Range : 85 km
details

Frequently compared as well

Mercedes A Class
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Kia Stonic
Kia XCeed
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Mercedes A Class

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 sprightly compact crossover that mixes city-friendly agility with a cheeky, modern design — perfect for buyers who want style without sacrificing sense. Inside it serves up clever practicality and a bright, well-equipped cabin, making everyday driving feel a bit more fun than it has any right to be.

details
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Kia_Stonic_MY22_16
Kia_Stonic_MY22_15
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Kia_Stonic_MJ22_05

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 A Class

The Mercedes A‑Class arrives as a compact charmer that dresses premium materials and a cockpit full of screens in a tidy, city-friendly package, delivering surprising agility and poise. For buyers who want a luxury badge, clever tech and a car that's equally happy in tight streets or on a spirited country run, the A‑Class offers a grown-up feel with a cheeky streak.

details
18C0292_008
18C0292_010
18C0292_042
18C0291_067
18C0122_04

Reviews Mercedes A Class

2.7 (1 Reviews)
rate

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

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Mercedes A Class

Costs and Consumption
Price
20,400 - 26,800 £
Price
32,600 - 66,500 £
Consumption L/100km
5.6 - 5.7 L/100km
Consumption L/100km
2.3 - 9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
85 km
Battery Capacity
-
Battery Capacity
-
co2
126 - 128 g/km
co2
53 - 205 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,205 - 1,270 kg
Curb weight
1,440 - 1,695 kg
Trunk capacity
352 L
Trunk capacity
310 - 350 L
Length
-
Length
-
Width
1,760 mm
Width
1,796 - 1,850 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
440 - 445 kg
Payload
450 - 485 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
Engine Type
Petrol MHEV, Diesel, Plugin Hybrid, Petrol
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
100 - 115 HP
Power HP
116 - 421 HP
Acceleration 0-100km/h
10.7 - 12.1 s
Acceleration 0-100km/h
3.9 - 9.7 s
Max Speed
-
Max Speed
-
Torque
172 - 200 Nm
Torque
200 - 500 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
74 - 85 kW
Power kW
85 - 310 kW
Engine capacity
998 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D
CO2 Efficiency Class
D, E, B, 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.