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Kia K4 vs Mazda MX-5 Roadster comparison

Compare performance (180 HP vs 132 HP), boot space and price (24,800 £ vs 29,000 £ ) at a glance. Find out which car is the better choice for you – Kia K4 or Mazda MX-5 Roadster?

Kia K4 vs Mazda MX-5 Roadster: Key differences

Kia K4

4.4 (6 Reviews)
rate
  • moderately cheaper
  • noticeably more power
  • very slightly more efficient
  • clearly more trunk space
details

Mazda MX-5 Roadster

  • only slightly quicker 0–100 km/h
  • visibly lighter
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

K4

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 K4 is moderately cheaper – starting at 24,800 £ , while the Mazda MX-5 Roadster costs 29,000 £ . That’s a price difference of around 4,200 £.

Fuel consumption also shows a difference: the Kia K4 uses 5.8 L/100km and is very slightly more efficient than the Mazda MX-5 Roadster with 6.2 L/100km. The difference is about 0.4 L/100km.

MX-5 Roadster

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 Kia K4 offers noticeably more power – delivering 180 HP compared to 132 HP. That’s roughly 48 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mazda MX-5 Roadster is only slightly quicker – completing the sprint in 8.3 s, while the Kia K4 takes 8.4 s. That’s about 0.1 s quicker.

There’s also a difference in torque: the Kia K4 delivers substantially more torque with 265 Nm compared to 152 Nm. That’s about 113 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.

Seats: Kia K4 offers more seats – 5 vs 2.

In terms of curb weight, Mazda MX-5 Roadster is visibly lighter – 1,078 kg compared to 1,415 kg. The difference is around 337 kg.

Looking at boot space, the Kia K4 offers clearly more boot space – 604 L compared to 130 L. That’s a difference of about 474 L.

When it comes to payload, the Kia K4 carries substantially more – 455 kg compared to 152 kg. That’s a difference of about 303 kg.

Who wins the race in the data check?

The Kia K4 is decisively ahead 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 £24,800
K4

Kia K4

  • Engine Type Petrol, Petrol MHEV
  • Transmission Manuel, Automatic
  • Drive Type Front-Wheel Drive
  • Power HP 115 - 180 HP
  • Consumption L/100km 5.8 - 7.1 L/100km
details

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Kia K4

Kia K4 shakes up the compact-sedan crowd with concept-car looks, a smartly packaged cabin, and the kind of easygoing refinement that makes rush hour feel less like a chore. It blends value, tech, and a dash of attitude, serving up a smooth, confident drive that might have you taking the long way home just to show off those angles.

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Reviews Kia K4

4.4 (6 Reviews)
rate
Joz
20 May 2026, 08:04:45

A modern, ultra-easy-to-use car with a full set of systems and assistants that work as they should, but with a sluggish gearbox and poor noise insulation.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Joz
20 May 2026, 08:04:45

A modern, ultra-easy-to-use car with a full set of systems and assistants that work as they should, but with a sluggish gearbox and poor soundproofing.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Joz
20 May 2026, 08:04:44

A modern, ultra-easy-to-use car with a full set of systems and assistants that work as they should, but with a sluggish gearbox and poor noise insulation.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Joz
20 May 2026, 08:04:44

A modern, ultra-easy-to-use car with a full set of systems and assistants that work as they should, but with a sluggish gearbox and poor sound insulation.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Joz
20 May 2026, 08:04:44

A modern, ultra-easy-to-use car with a full set of systems and assistants that work as they should, but hampered by a sluggish gearbox and poor soundproofing.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

Mazda MX-5 Roadster

The Mazda MX-5 is a featherweight, open-top sports car that turns ordinary roads into a grin-inducing playground thanks to razor-sharp steering and an engaging, tactile gearbox. It won’t swallow the weekly shopping or ski bags, but for anyone after pure driving fun and sun-on-your-face weekends, few cars match its sheer charm and value.

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2023_mazda_mx-5_portugal_int_002_highres

Reviews Mazda MX-5 Roadster

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

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Costs and Consumption
Price
24,800 - 34,200 £
Price
29,000 - 34,300 £
Consumption L/100km
5.8 - 7.1 L/100km
Consumption L/100km
6.2 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
132 - 161 g/km
co2
140 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback, Estate
Body Type
Roadster
Seats
5
Seats
2
Doors
-
Doors
-
Curb weight
1,415 - 1,540 kg
Curb weight
1,078 kg
Trunk capacity
328 - 604 L
Trunk capacity
130 L
Length
-
Length
-
Width
1,850 mm
Width
1,735 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
435 - 455 kg
Payload
152 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
Engine Type
Petrol
Transmission
Manuel, Automatic
Transmission
Manuel
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Manual Gearbox
Drive Type
Front-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
115 - 180 HP
Power HP
132 HP
Acceleration 0-100km/h
8.4 - 12.3 s
Acceleration 0-100km/h
8.3 s
Max Speed
-
Max Speed
-
Torque
200 - 265 Nm
Torque
152 Nm
Number of Cylinders
3 - 4
Number of Cylinders
4
Power kW
85 - 132 kW
Power kW
97 kW
Engine capacity
998 - 1,598 cm3
Engine capacity
1,496 cm3

General
Model Year
2,025 - 2,026
Model Year
2025
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
E
Brand
Kia
Brand
Mazda
Is the Kia K4 offered with different drivetrains?

The Kia K4 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.