VS

BMW 4 Series Convertible vs Kia K4 comparison

Compare performance (530 HP vs 180 HP), boot space and price (52,600 £ vs 24,800 £ ) at a glance. Find out which car is the better choice for you – BMW 4 Series Convertible or Kia K4?

BMW 4 Series Convertible vs Kia K4: Key differences

BMW 4 Series Convertible

  • considerably more power
  • somewhat more efficient
  • substantially quicker 0–100 km/h
details

Kia K4

4.4 (6 Reviews)
rate
  • significantly cheaper
  • markedly lighter
  • markedly more trunk space
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

4 Series Convertible

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 significantly cheaper – starting at 24,800 £ , while the BMW 4 Series Convertible costs 52,600 £ . That’s a price difference of around 27,866 £.

Fuel consumption also shows a difference: the BMW 4 Series Convertible uses 5.2 L/100km and is somewhat more efficient than the Kia K4 with 5.8 L/100km. The difference is about 0.6 L/100km.

K4

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 BMW 4 Series Convertible offers considerably more power – delivering 530 HP compared to 180 HP. That’s roughly 350 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 4 Series Convertible is substantially quicker – completing the sprint in 3.7 s, while the Kia K4 takes 8.4 s. That’s about 4.7 s quicker.

There’s also a difference in torque: the BMW 4 Series Convertible delivers clearly more torque with 700 Nm compared to 265 Nm. That’s about 435 Nm more.

4 Series Convertible

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Seats: Kia K4 offers more seats – 5 vs 4.

In terms of curb weight, Kia K4 is markedly lighter – 1,415 kg compared to 1,765 kg. The difference is around 350 kg.

Looking at boot space, the Kia K4 offers markedly more boot space – 604 L compared to 385 L. That’s a difference of about 219 L.

When it comes to payload, the Kia K4 carries barely more – 455 kg compared to 420 kg. That’s a difference of about 35 kg.

Who wins the race in the data check?

The BMW 4 Series Convertible 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 £52,600
4 Series Convertible

BMW 4 Series Convertible

  • Engine Type Diesel MHEV, Petrol, Petrol MHEV
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 184 - 530 HP
  • Consumption L/100km 5.2 - 10.2 L/100km
details

Frequently compared as well

Skoda Octavia Combi
Kia K4
VS
Comparing the Škoda Octavia Estate (commonly called the Octavia Combi) with the Kia K4 pits a spacious, practical wagon against a compact, value-focused sedan, each aimed at buyers who prioritise different kinds of everyday usability. This short head-to-head will focus on space, driving character, …
BMW 4 Series Convertible
Mercedes CLE Convertible
VS
The BMW 4 Series Convertible and the Mercedes CLE Convertible go head-to-head as premium drop-top coupes, with the BMW known for taut, driver-focused handling and the CLE leaning into comfort, style, and advanced tech. Choose the 4 Series for a sharper, more engaging drive; opt for the CLE if you …
BMW 4 Series Convertible
Kia K4

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BMW 4 Series Convertible

The BMW 4 Series Convertible blends coupe-like elegance with open-top drama, its sleek profile and distinctive grille demanding attention whether the roof’s up or down. Behind the wheel it serves up taut handling and a refined ride, making it a rewarding choice for drivers who want sporty character without sacrificing everyday comfort — and yes, it looks spectacular when you drop the top.

details
P90400407_highRes_the-all-new-bmw-4-se
P90400400_highRes_the-all-new-bmw-4-se
P90400423_highRes_the-all-new-bmw-4-se
P90414434_highRes_bmw-m440i-xdrive-con
P90133563_highRes_the-new-bmw-4-series

Reviews BMW 4 Series Convertible

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

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.

details
serpimg_SfmUuV

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

Frequently compared as well

Kia Ceed
Kia K4
VS
Kia Ceed and Kia K4 go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Kia Ceed or the Kia K4 is the …
BMW 4 Series Convertible
Mercedes E-Class
VS
BMW 4 Series Convertible and Mercedes E-Class go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the BMW 4 …
BMW 4 Series Convertible
BMW 8 Series Convertible
VS
BMW 4 Series Convertible and BMW 8 Series Convertible go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the …
Kia XCeed
Kia K4
VS
Kia XCeed and Kia K4 go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Kia XCeed or the Kia K4 is the …
Peugeot 308 SW
Kia K4
VS
Peugeot 308 SW and Kia K4 go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Peugeot 308 SW or the Kia K4 …
BMW 2 Series
BMW 4 Series Convertible
VS
In the realm of luxury coupes, the BMW 2 Series takes center stage with its compact agility and sporty dynamics, making it an ideal choice for enthusiasts seeking spirited driving in urban settings. Meanwhile, the BMW 4 Series Convertible offers an alluring blend of style and elegance, with its …
Ford Focus
Kia K4
VS
Ford Focus and Kia K4 go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Ford Focus or the Kia K4 is the …
Honda HR-V
Kia K4
VS
Honda HR-V and Kia K4 go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the Honda HR-V or the Kia K4 is the …
BMW 4 Series Convertible
Kia K4

Costs and Consumption
Price
52,600 - 97,800 £
Price
24,800 - 34,200 £
Consumption L/100km
5.2 - 10.2 L/100km
Consumption L/100km
5.8 - 7.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
136 - 231 g/km
co2
132 - 161 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
Hatchback, Estate
Seats
4
Seats
5
Doors
-
Doors
-
Curb weight
1,765 - 2,055 kg
Curb weight
1,415 - 1,540 kg
Trunk capacity
385 L
Trunk capacity
328 - 604 L
Length
-
Length
-
Width
1,852 - 1,887 mm
Width
1,850 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
345 - 420 kg
Payload
435 - 455 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol, Petrol MHEV
Engine Type
Petrol, Petrol MHEV
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
184 - 530 HP
Power HP
115 - 180 HP
Acceleration 0-100km/h
3.7 - 8.2 s
Acceleration 0-100km/h
8.4 - 12.3 s
Max Speed
-
Max Speed
-
Torque
300 - 700 Nm
Torque
200 - 265 Nm
Number of Cylinders
4 - 6
Number of Cylinders
3 - 4
Power kW
135 - 390 kW
Power kW
85 - 132 kW
Engine capacity
1,995 - 2,998 cm3
Engine capacity
998 - 1,598 cm3

General
Model Year
2,024 - 2,025
Model Year
2,025 - 2,026
CO2 Efficiency Class
E, F, G
CO2 Efficiency Class
D, E, F
Brand
BMW
Brand
Kia
What drive types are available for the BMW 4 Series Convertible?

The BMW 4 Series Convertible is available as Rear-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.