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Kia Niro vs Mazda 3 Sedan comparison

Compare performance (138 HP vs 186 HP), boot space and price (29,100 £ vs 25,000 £ ) at a glance. Find out which car is the better choice for you – Kia Niro or Mazda 3 Sedan?

Kia Niro vs Mazda 3 Sedan: Key differences

Kia Niro

4.5 (2 Reviews)
rate
  • markedly more efficient

Mazda 3 Sedan

4.7 (1 Reviews)
rate
  • a bit cheaper
  • visibly more power
  • visibly quicker 0–100 km/h
  • marginally lighter

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

Niro

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 a bit cheaper – starting at 25,000 £ , while the Kia Niro costs 29,100 £ . That’s a price difference of around 4,157 £.

Fuel consumption also shows a difference: the Kia Niro uses 4.5 L/100km and is markedly more efficient than the Mazda 3 Sedan with 5.5 L/100km. The difference is about 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 visibly more power – delivering 186 HP compared to 138 HP. That’s roughly 48 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 Niro takes 11.1 s. That’s about 3 s quicker.

There’s also a difference in torque: the Kia Niro delivers marginally more torque with 265 Nm compared to 240 Nm. That’s about 25 Nm more.

Niro

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, Mazda 3 Sedan is marginally lighter – 1,420 kg compared to 1,474 kg. The difference is around 54 kg.

When it comes to payload, the Mazda 3 Sedan carries very slightly more – 481 kg compared to 466 kg. That’s a difference of about 15 kg.

Who wins the race in the data check?

The Mazda 3 Sedan is clearly superior 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

Kia Niro
Kia XCeed
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It's the compact-crossover face-off that asks whether you crave wallet-friendly efficiency or a bit more personality: the Kia Niro goes toe-to-toe with the Kia XCeed. One is all about hybrid thrift and everyday practicality; the other flirts with sharper styling and a livelier drive — both sensible …
Kia Niro
Kia Stonic
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In the battle of compact crossovers, the Kia Niro and Kia Stonic each bring their own unique strengths to the table. The Niro impresses with its hybrid efficiency and spacious interior, making it an ideal choice for eco-conscious drivers. Meanwhile, the Stonic stands out with its sporty design and …
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Mazda 3 Sedan

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Kia Niro

The Kia Niro blends clever packaging and modern styling into a compact crossover that’s refreshingly sensible for daily life. It’s comfortable, economical and packed with user‑friendly tech, so if you want a fuss‑free family car with a touch of green credibility, the Niro is worth a test drive.

details
Kia_Niro_HEV_08
Kia_Niro_HEV_24
Kia_Niro_HEV_22
Kia_Niro_HEV_05
Kia_Niro_HEV_13

Reviews Kia Niro

4.5 (2 Reviews)
rate
Archi
25 Mar 2026, 13:11:41

Efficient, functional, understated, spacious and comfortable. No surprises: it delivers what it promises and does its job without fanfare. Good buy.

How do you mainly use this car? (optional): Leisure / Weekend driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Wolfgang Schäfer
21 Oct 2025, 14:01:32

I've been driving the Kia Niro since 2019 and am still very happy with this car.

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.

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Kia Niro
Mazda 3 Sedan

Costs and Consumption
Price
29,100 - 33,800 £
Price
25,000 - 34,200 £
Consumption L/100km
4.5 - 4.9 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
102 - 111 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
1,474 kg
Curb weight
1,420 - 1,492 kg
Trunk capacity
-
Trunk capacity
450 L
Length
-
Length
-
Width
1,825 mm
Width
1,795 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
466 kg
Payload
467 - 481 kg

Engine and Performance
Engine Type
Full Hybrid
Engine Type
Petrol MHEV
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Automatic Gearbox
Drive Type
Front-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
138 HP
Power HP
140 - 186 HP
Acceleration 0-100km/h
11.1 - 11.4 s
Acceleration 0-100km/h
8.1 - 9.8 s
Max Speed
-
Max Speed
-
Torque
265 Nm
Torque
238 - 240 Nm
Number of Cylinders
4
Number of Cylinders
4
Power kW
102 kW
Power kW
103 - 137 kW
Engine capacity
1,580 cm3
Engine capacity
1,998 - 2,488 cm3

General
Model Year
2,025
Model Year
2,025
CO2 Efficiency Class
C
CO2 Efficiency Class
D
Brand
Kia
Brand
Mazda
What drive types are available for the Kia Niro?

The Kia Niro 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.