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Mazda 3 Sedan vs Audi A3 Sportback comparison

Compare performance (186 HP vs 400 HP), boot space and price (25,400 £ vs 27,000 £ ) at a glance. Find out which car is the better choice for you – Mazda 3 Sedan or Audi A3 Sportback?

Mazda 3 Sedan vs Audi A3 Sportback: Key differences

Mazda 3 Sedan

4.7 (1 Reviews)
rate
  • only slightly cheaper
  • slightly more trunk space
details

Audi A3 Sportback

4.1 (2 Reviews)
rate
  • substantially more power
  • substantially more efficient
  • significantly quicker 0–100 km/h
  • only slightly lighter
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By Achim Sedelmaier

Here’s where it gets real: The technical differences in detail

3 Sedan

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mazda 3 Sedan is only slightly cheaper – starting at 25,400 £ , while the Audi A3 Sportback costs 27,000 £ . That’s a price difference of around 1,552 £.

Fuel consumption also shows a difference: the Audi A3 Sportback uses 1.1 L/100km and is substantially more efficient than the Mazda 3 Sedan with 5.5 L/100km. The difference is about 4.4 L/100km.

A3 Sportback

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 Audi A3 Sportback offers substantially more power – delivering 400 HP compared to 186 HP. That’s roughly 214 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Sportback is significantly quicker – completing the sprint in 3.8 s, while the Mazda 3 Sedan takes 8.1 s. That’s about 4.3 s quicker.

There’s also a difference in torque: the Audi A3 Sportback delivers substantially more torque with 500 Nm compared to 240 Nm. That’s about 260 Nm more.

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, Audi A3 Sportback is only slightly lighter – 1,360 kg compared to 1,417 kg. The difference is around 57 kg.

Looking at boot space, the Mazda 3 Sedan offers slightly more boot space – 450 L compared to 380 L. That’s a difference of about 70 L.

When it comes to payload, the Mazda 3 Sedan carries marginally more – 501 kg compared to 480 kg. That’s a difference of about 21 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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Mazda 3 Sedan
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

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.

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Reviews Mazda 3 Sedan

4.7 (1 Reviews)
rate

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

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.

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Mazda 3 Sedan
Audi A3 Sportback

Costs and Consumption
Price
25,400 - 34,700 £
Price
27,000 - 92,900 £
Consumption L/100km
5.5 - 6 L/100km
Consumption L/100km
1.1 - 9.3 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
134 - 141 km
Battery Capacity
-
Battery Capacity
-
co2
123 - 137 g/km
co2
25 - 211 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
Hatchback
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,417 - 1,468 kg
Curb weight
1,360 - 1,685 kg
Trunk capacity
450 L
Trunk capacity
280 - 380 L
Length
-
Length
-
Width
1,795 mm
Width
1,816 - 1,851 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
482 - 501 kg
Payload
410 - 480 kg

Engine and Performance
Engine Type
Petrol MHEV
Engine Type
Petrol, Petrol MHEV, Diesel, Plugin Hybrid
Transmission
Manuel, Automatic
Transmission
Manuel, Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Front-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
140 - 186 HP
Power HP
116 - 400 HP
Acceleration 0-100km/h
8.1 - 9.8 s
Acceleration 0-100km/h
3.8 - 10.1 s
Max Speed
-
Max Speed
-
Torque
238 - 240 Nm
Torque
220 - 500 Nm
Number of Cylinders
4
Number of Cylinders
4 - 5
Power kW
103 - 137 kW
Power kW
85 - 294 kW
Engine capacity
1,998 - 2,488 cm3
Engine capacity
1,498 - 2,480 cm3

General
Model Year
2026
Model Year
2,025 - 2,026
CO2 Efficiency Class
D, E
CO2 Efficiency Class
D, F, E, G, B
Brand
Mazda
Brand
Audi
What drivetrain options does the Mazda 3 Sedan have?

The Mazda 3 Sedan 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.