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BMW 8 Series Convertible vs Kia EV9 comparison

Compare performance (625 HP vs 508 HP), boot space and price (99,400 £ vs 54,600 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Convertible or Kia EV9?

BMW 8 Series Convertible vs Kia EV9: Key differences

BMW 8 Series Convertible

  • slightly more power
  • visibly quicker 0–100 km/h
  • noticeably lighter
  • very slightly more trunk space
details

Kia EV9

5 (1 Reviews)
rate
  • significantly cheaper
details

By Achim Sedelmaier

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

8 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 EV9 is significantly cheaper – starting at 54,600 £ , while the BMW 8 Series Convertible costs 99,400 £ . That’s a price difference of around 44,837 £.

EV9

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 BMW 8 Series Convertible offers slightly more power – delivering 625 HP compared to 508 HP. That’s roughly 117 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 8 Series Convertible is visibly quicker – completing the sprint in 3.3 s, while the Kia EV9 takes 4.6 s. That’s about 1.3 s quicker.

There’s also a difference in torque: the BMW 8 Series Convertible delivers barely more torque with 750 Nm compared to 740 Nm. That’s about 10 Nm more.

8 Series Convertible

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 EV9 offers more seats – 7 vs 4.

In terms of curb weight, BMW 8 Series Convertible is noticeably lighter – 1,915 kg compared to 2,392 kg. The difference is around 477 kg.

Looking at boot space, the BMW 8 Series Convertible offers very slightly more boot space – 350 L compared to 333 L. That’s a difference of about 17 L.

When it comes to payload, the Kia EV9 carries visibly more – 615 kg compared to 425 kg. That’s a difference of about 190 kg.

Who wins the race in the data check?

The Kia EV9 stands well ahead of its rival 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 £54,600
EV9

Kia EV9

  • Engine Type Electric
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 204 - 508 HP
  • Consumption kWh/100km 19.5 - 22.8 kWh/100km
  • Electric Range 443 - 563 km
details

Frequently compared as well

Kia EV9
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BMW 8 Series Convertible
Kia EV9

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

BMW 8 Series Convertible

The BMW 8 Series Convertible is a head-turning grand tourer that drops its roof with the kind of theatrical flourish you expect from a modern Bavarian showboat. It wraps occupants in sumptuous materials and driver-focused polish, offering effortless long-distance comfort and just enough drama to make every arrival feel like an occasion.

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P90343983_highRes_the-new-bmw-m850i-xd
P90343979_highRes_the-new-bmw-m850i-xd

Reviews BMW 8 Series Convertible

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

Kia EV9

The Kia EV9 is a bold, boxy electric SUV that looks like it could swallow your luggage and the in‑laws, with an interior that feels more lounge than cockpit and a presence that makes smaller rivals suddenly feel shy. On the road it delivers calm long‑distance composure with enough shove to keep overtakes effortless, and its tech and practicality make it an easy, sensible choice for buyers who want electric without compromise.

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KIA_EV9-GTLine-Static_01
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KIA_EV9-GTLine-Detail_02
KIA_EV9-GTLine-Interior_02
KIA_EV9-GTLine-Interior_01

Reviews Kia EV9

5 (1 Reviews)
rate

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

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BMW 8 Series Convertible
Kia EV9

Costs and Consumption
Price
99,400 - 165,800 £
Price
54,600 - 78,400 £
Consumption L/100km
6.9 - 11.2 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
19.5 - 22.8 kWh/100km
Electric Range
-
Electric Range
443 - 563 km
Battery Capacity
-
Battery Capacity
-
co2
180 - 255 g/km
co2
0 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
SUV
Seats
4
Seats
6 - 7
Doors
2
Doors
-
Curb weight
1,915 - 2,125 kg
Curb weight
2,392 - 2,664 kg
Trunk capacity
350 L
Trunk capacity
333 L
Length
4,851 - 4,867 mm
Length
-
Width
1,902 - 1,907 mm
Width
1,980 mm
Height
1,345 - 1,353 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
340 - 425 kg
Payload
542 - 615 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
333 - 625 HP
Power HP
204 - 508 HP
Acceleration 0-100km/h
3.3 - 5.5 s
Acceleration 0-100km/h
4.6 - 9.4 s
Max Speed
250 km/h
Max Speed
-
Torque
500 - 750 Nm
Torque
350 - 740 Nm
Number of Cylinders
6 - 8
Number of Cylinders
-
Power kW
245 - 460 kW
Power kW
150 - 374 kW
Engine capacity
2,993 - 4,395 cm3
Engine capacity
-

General
Model Year
2024
Model Year
2025
CO2 Efficiency Class
G
CO2 Efficiency Class
A
Brand
BMW
Brand
Kia
What drivetrain options does the BMW 8 Series Convertible have?

Available configurations include All-Wheel Drive or Rear-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.