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Kia Stonic vs Mazda 3 Sedan comparison

Compare performance (115 HP vs 186 HP), boot space and price (20,400 £ vs 25,000 £ ) at a glance. Find out which car is the better choice for you – Kia Stonic or Mazda 3 Sedan?

Kia Stonic vs Mazda 3 Sedan: Key differences

Kia Stonic

4.6 (2 Reviews)
rate
  • markedly cheaper
  • a bit lighter
details

Mazda 3 Sedan

4.7 (1 Reviews)
rate
  • clearly more power
  • barely more efficient
  • visibly quicker 0–100 km/h
  • visibly 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.

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 markedly cheaper – starting at 20,400 £ , while the Mazda 3 Sedan costs 25,000 £ . That’s a price difference of around 4,586 £.

Fuel consumption also shows a difference: the Mazda 3 Sedan uses 5.5 L/100km and is barely more efficient than the Kia Stonic with 5.6 L/100km. The difference is about 0.1 L/100km.

3 Sedan

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 Mazda 3 Sedan offers clearly more power – delivering 186 HP compared to 115 HP. That’s roughly 71 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mazda 3 Sedan is visibly quicker – completing the sprint in 8.1 s, while the Kia Stonic takes 10.7 s. That’s about 2.6 s quicker.

There’s also a difference in torque: the Mazda 3 Sedan delivers moderately more torque with 240 Nm compared to 200 Nm. That’s about 40 Nm more.

Stonic

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, Kia Stonic is a bit lighter – 1,205 kg compared to 1,420 kg. The difference is around 215 kg.

Looking at boot space, the Mazda 3 Sedan offers visibly more boot space – 450 L compared to 352 L. That’s a difference of about 98 L.

When it comes to payload, the Mazda 3 Sedan carries only slightly more – 481 kg compared to 445 kg. That’s a difference of about 36 kg.

Who wins the race in the data check?

The Mazda 3 Sedan 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 £25,000
3 Sedan

Mazda 3 Sedan

  • Engine Type : Petrol MHEV
  • Transmission : Manuel, Automatic
  • Drive Type : Front-Wheel Drive
  • Power HP : 140 - 186 HP
  • Consumption L/100km : 5.5 - 6.1 L/100km
details

Frequently compared as well

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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 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.

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Kia_Stonic_MY22_16
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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

Mazda 3 Sedan

The Mazda 3 Sedan dresses like a compact premium car, with sculpted lines and an interior that punches well above its class. It rewards drivers with eager handling and a composed, comfortable ride that turns routine runs into something a bit more enjoyable — proof that style and substance can share the same key.

details
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Reviews Mazda 3 Sedan

4.7 (1 Reviews)
rate

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

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Mazda 3 Sedan

Costs and Consumption
Price
20,400 - 26,800 £
Price
25,000 - 34,200 £
Consumption L/100km
5.6 - 5.7 L/100km
Consumption L/100km
5.5 - 6.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
126 - 128 g/km
co2
123 - 135 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
1,420 - 1,492 kg
Trunk capacity
352 L
Trunk capacity
450 L
Length
-
Length
-
Width
1,760 mm
Width
1,795 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
440 - 445 kg
Payload
467 - 481 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
Engine Type
Petrol MHEV
Transmission
Manuel, Automatic
Transmission
Manuel, Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Drive Type
Front-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
100 - 115 HP
Power HP
140 - 186 HP
Acceleration 0-100km/h
10.7 - 12.1 s
Acceleration 0-100km/h
8.1 - 9.8 s
Max Speed
-
Max Speed
-
Torque
172 - 200 Nm
Torque
238 - 240 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
74 - 85 kW
Power kW
103 - 137 kW
Engine capacity
998 cm3
Engine capacity
1,998 - 2,488 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D
CO2 Efficiency Class
D
Brand
Kia
Brand
Mazda
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.