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BMW 8 Series Convertible vs Citroen C5 X comparison

Compare performance (625 HP vs 145 HP), boot space and price (99,400 £ vs 39,400 £ ) at a glance. Find out which car is the better choice for you – BMW 8 Series Convertible or Citroen C5 X?

BMW 8 Series Convertible vs Citroen C5 X: Key differences

BMW 8 Series Convertible

  • significantly more power
  • significantly quicker 0–100 km/h
details

Citroen C5 X

4.2 (4 Reviews)
rate
  • clearly cheaper
  • markedly more efficient
  • visibly 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

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.

Citroen C5 X is clearly cheaper – starting at 39,400 £ , while the BMW 8 Series Convertible costs 99,400 £ . That’s a price difference of around 60,000 £.

Fuel consumption also shows a difference: the Citroen C5 X uses 5.1 L/100km and is markedly more efficient than the BMW 8 Series Convertible with 6.9 L/100km. The difference is about 1.8 L/100km.

C5 X

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 significantly more power – delivering 625 HP compared to 145 HP. That’s roughly 480 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 8 Series Convertible is significantly quicker – completing the sprint in 3.3 s, while the Citroen C5 X takes 10.4 s. That’s about 7.1 s quicker.

There’s also a difference in torque: the BMW 8 Series Convertible delivers considerably more torque with 750 Nm compared to 230 Nm. That’s about 520 Nm more.

8 Series Convertible

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Seats: Citroen C5 X offers more seats – 5 vs 4.

In terms of curb weight, Citroen C5 X is visibly lighter – 1,591 kg compared to 1,915 kg. The difference is around 324 kg.

Looking at boot space, the Citroen C5 X offers markedly more boot space – 545 L compared to 350 L. That’s a difference of about 195 L.

When it comes to payload, the BMW 8 Series Convertible carries barely more – 425 kg compared to 399 kg. That’s a difference of about 26 kg.

Who wins the race in the data check?

The BMW 8 Series Convertible 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 £99,400
8 Series Convertible

BMW 8 Series Convertible

  • Engine Type Diesel MHEV, Petrol
  • Transmission Automatic
  • Drive Type All-Wheel Drive, Rear-Wheel Drive
  • Power HP 333 - 625 HP
  • Consumption L/100km 6.9 - 11.2 L/100km
details

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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.

Citroen C5 X

Citroen C5 X combines the poise of a sleek crossover with the practicality of an estate, delivering a calm, comfortable cabin that feels designed for long, relaxed journeys rather than racetrack drama. If you want a car that pampers passengers, swallows everyday luggage and glides over rough roads like a diplomat dodging awkward questions, this is your kind of transport.

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C5X_PHEV_UK_2022_EXT (21)
C5X_PHEV_2022_EXT (12)
C5X_PHEV_2022_EXT (23)
C5X_2022_INT (20)

Reviews Citroen C5 X

4.2 (4 Reviews)
rate
Flament
13 Jun 2026, 13:54:21

Value for money / comfort, space unbeatable — C5 X Shine, 4‑cylinder petrol with options... heated, electrically adjustable programmable seat, 2 years, 12,000 km, €23,000

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

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BMW 8 Series Convertible
Citroen C5 X

Costs and Consumption
Price
99,400 - 165,800 £
Price
39,400 £
Consumption L/100km
6.9 - 11.2 L/100km
Consumption L/100km
5.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
180 - 255 g/km
co2
116 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
Estate
Seats
4
Seats
5
Doors
2
Doors
-
Curb weight
1,915 - 2,125 kg
Curb weight
1,591 kg
Trunk capacity
350 L
Trunk capacity
545 L
Length
4,851 - 4,867 mm
Length
-
Width
1,902 - 1,907 mm
Width
1,815 mm
Height
1,345 - 1,353 mm
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
340 - 425 kg
Payload
399 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol
Engine Type
Petrol MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
333 - 625 HP
Power HP
145 HP
Acceleration 0-100km/h
3.3 - 5.5 s
Acceleration 0-100km/h
10.4 s
Max Speed
250 km/h
Max Speed
-
Torque
500 - 750 Nm
Torque
230 Nm
Number of Cylinders
6 - 8
Number of Cylinders
3
Power kW
245 - 460 kW
Power kW
107 kW
Engine capacity
2,993 - 4,395 cm3
Engine capacity
1,199 cm3

General
Model Year
2024
Model Year
2025
CO2 Efficiency Class
G
CO2 Efficiency Class
D
Brand
BMW
Brand
Citroen
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.