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Audi A3 Sportback vs Kia Stonic comparison

Compare performance (400 HP vs 115 HP), boot space and price (27,000 £ vs 20,400 £ ) at a glance. Find out which car is the better choice for you – Audi A3 Sportback or Kia Stonic?

Audi A3 Sportback vs Kia Stonic: Key differences

Audi A3 Sportback

4.1 (2 Reviews)
rate
  • significantly more power
  • clearly more efficient
  • clearly quicker 0–100 km/h
  • barely more trunk space
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Kia Stonic

4.6 (2 Reviews)
rate
  • clearly cheaper
  • somewhat lighter
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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

A3 Sportback

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 clearly cheaper – starting at 20,400 £ , while the Audi A3 Sportback costs 27,000 £ . That’s a price difference of around 6,609 £.

Fuel consumption also shows a difference: the Audi A3 Sportback uses 1.1 L/100km and is clearly more efficient than the Kia Stonic with 5.6 L/100km. The difference is about 4.5 L/100km.

Stonic

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 Audi A3 Sportback offers significantly more power – delivering 400 HP compared to 115 HP. That’s roughly 285 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Sportback is clearly quicker – completing the sprint in 3.8 s, while the Kia Stonic takes 10.7 s. That’s about 6.9 s quicker.

There’s also a difference in torque: the Audi A3 Sportback delivers substantially more torque with 500 Nm compared to 200 Nm. That’s about 300 Nm more.

A3 Sportback

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 somewhat lighter – 1,205 kg compared to 1,360 kg. The difference is around 155 kg.

Looking at boot space, the Audi A3 Sportback offers barely more boot space – 380 L compared to 352 L. That’s a difference of about 28 L.

When it comes to payload, the Audi A3 Sportback carries barely more – 480 kg compared to 445 kg. That’s a difference of about 35 kg.

Who wins the race in the data check?

The Audi A3 Sportback holds a decisive overall lead 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 £27,000
A3 Sportback

Audi A3 Sportback

  • Engine Type Petrol, Petrol MHEV, Diesel, Plugin Hybrid
  • Transmission Manuel, Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 400 HP
  • Consumption L/100km 1.1 - 9.3 L/100km
  • Electric Range 134 - 141 km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A3 Sportback

The Audi A3 Sportback wraps premium materials and crisp German design into a practical hatchback package that makes daily driving feel smart rather than showy. It’s nimble in the city, composed on longer trips, and carries just enough swagger to satisfy buyers who want quality without shouting about it.

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Reviews Audi A3 Sportback

4.1 (2 Reviews)
rate

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

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

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Audi A3 Sportback
Kia Stonic

Costs and Consumption
Price
27,000 - 92,900 £
Price
20,400 - 26,800 £
Consumption L/100km
1.1 - 9.3 L/100km
Consumption L/100km
5.6 - 5.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
134 - 141 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
25 - 211 g/km
co2
126 - 128 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,360 - 1,685 kg
Curb weight
1,205 - 1,270 kg
Trunk capacity
280 - 380 L
Trunk capacity
352 L
Length
-
Length
-
Width
1,816 - 1,851 mm
Width
1,760 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
410 - 480 kg
Payload
440 - 445 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel, Plugin Hybrid
Engine Type
Petrol, Petrol MHEV
Transmission
Manuel, Automatic
Transmission
Manuel, Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
116 - 400 HP
Power HP
100 - 115 HP
Acceleration 0-100km/h
3.8 - 10.1 s
Acceleration 0-100km/h
10.7 - 12.1 s
Max Speed
-
Max Speed
-
Torque
220 - 500 Nm
Torque
172 - 200 Nm
Number of Cylinders
4 - 5
Number of Cylinders
3
Power kW
85 - 294 kW
Power kW
74 - 85 kW
Engine capacity
1,498 - 2,480 cm3
Engine capacity
998 cm3

General
Model Year
2,025 - 2,026
Model Year
2025
CO2 Efficiency Class
D, F, E, G, B
CO2 Efficiency Class
D
Brand
Audi
Brand
Kia
What drive types are available for the Audi A3 Sportback?

The Audi A3 Sportback is available as Front-Wheel Drive or All-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.