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Kia Stonic vs Mazda 6 Estate comparison

Compare performance (115 HP vs 194 HP), boot space and price (20,400 £ vs 30,000 £ ) at a glance. Find out which car is the better choice for you – Kia Stonic or Mazda 6 Estate?

Kia Stonic vs Mazda 6 Estate: Key differences

Kia Stonic

4.6 (2 Reviews)
rate
  • considerably cheaper
  • markedly more efficient
  • clearly lighter
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Mazda 6 Estate

4.9 (2 Reviews)
rate
  • significantly more power
  • markedly quicker 0–100 km/h
  • noticeably 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:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

Kia Stonic is considerably cheaper – starting at 20,400 £ , while the Mazda 6 Estate costs 30,000 £ . That’s a price difference of around 9,609 £.

Fuel consumption also shows a difference: the Kia Stonic uses 5.6 L/100km and is markedly more efficient than the Mazda 6 Estate with 6.8 L/100km. The difference is about 1.2 L/100km.

6 Estate

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Mazda 6 Estate offers significantly more power – delivering 194 HP compared to 115 HP. That’s roughly 79 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mazda 6 Estate is markedly 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 6 Estate delivers clearly more torque with 258 Nm compared to 200 Nm. That’s about 58 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 clearly lighter – 1,205 kg compared to 1,475 kg. The difference is around 270 kg.

Looking at boot space, the Mazda 6 Estate offers noticeably more boot space – 522 L compared to 352 L. That’s a difference of about 170 L.

When it comes to payload, the Mazda 6 Estate carries noticeably more – 571 kg compared to 445 kg. That’s a difference of about 126 kg.

Who wins the race in the data check?

The Mazda 6 Estate 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 £30,000
6 Estate

Mazda 6 Estate

  • Engine Type Petrol
  • Transmission Manuel, Automatic
  • Drive Type Front-Wheel Drive
  • Power HP 145 - 194 HP
  • Consumption L/100km 6.8 - 7.6 L/100km
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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

Mazda 6 Estate

The Mazda 6 Estate marries elegant, flowing design with everyday practicality, so you get a grown-up wagon that still looks the part on a weekend escape. It rewards drivers with poised handling and a nicely finished cabin, proving that sensible family cars can be engaging — and a little bit cheeky — too.

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Reviews Mazda 6 Estate

4.9 (2 Reviews)
rate
Kai
14 Jul 2026, 09:51:17

Very stylish and robust car that's consistently comfortable even on long journeys.

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
Mazda 6 Estate

Costs and Consumption
Price
20,400 - 26,800 £
Price
30,000 - 43,500 £
Consumption L/100km
5.6 - 5.7 L/100km
Consumption L/100km
6.8 - 7.6 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
126 - 128 g/km
co2
155 - 172 g/km
Fuel tank capacity
-
Fuel tank capacity
62 L

Dimensions and Body
Body Type
SUV
Body Type
Estate
Seats
5
Seats
5
Doors
-
Doors
5
Curb weight
1,205 - 1,270 kg
Curb weight
1,475 - 1,598 kg
Trunk capacity
352 L
Trunk capacity
522 L
Length
-
Length
4,805 mm
Width
1,760 mm
Width
1,840 mm
Height
-
Height
1,480 mm
Max trunk capacity
-
Max trunk capacity
1,664 L
Payload
440 - 445 kg
Payload
483 - 571 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
Engine Type
Petrol
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
145 - 194 HP
Acceleration 0-100km/h
10.7 - 12.1 s
Acceleration 0-100km/h
8.1 - 10.7 s
Max Speed
-
Max Speed
205 - 223 km/h
Torque
172 - 200 Nm
Torque
213 - 258 Nm
Number of Cylinders
3
Number of Cylinders
4
Power kW
74 - 85 kW
Power kW
107 - 143 kW
Engine capacity
998 cm3
Engine capacity
1,998 - 2,488 cm3

General
Model Year
2025
Model Year
2,021 - 2,022
CO2 Efficiency Class
D
CO2 Efficiency Class
E, F
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.