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BMW 4 Series Convertible vs Renault Symbioz comparison

Compare performance (530 HP vs 158 HP), boot space and price (52,600 £ vs 24,700 £ ) at a glance. Find out which car is the better choice for you – BMW 4 Series Convertible or Renault Symbioz?

BMW 4 Series Convertible vs Renault Symbioz: Key differences

BMW 4 Series Convertible

  • substantially more power
  • clearly quicker 0–100 km/h
details

Renault Symbioz

4.8 (5 Reviews)
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  • considerably cheaper
  • somewhat more efficient
  • visibly lighter
  • visibly 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.

Renault Symbioz is considerably cheaper – starting at 24,700 £ , while the BMW 4 Series Convertible costs 52,600 £ . That’s a price difference of around 27,943 £.

Fuel consumption also shows a difference: the Renault Symbioz uses 4.5 L/100km and is somewhat more efficient than the BMW 4 Series Convertible with 5.2 L/100km. The difference is about 0.7 L/100km.

Symbioz

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 BMW 4 Series Convertible offers substantially more power – delivering 530 HP compared to 158 HP. That’s roughly 372 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 4 Series Convertible is clearly quicker – completing the sprint in 3.7 s, while the Renault Symbioz takes 9.1 s. That’s about 5.4 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:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Seats: Renault Symbioz offers more seats – 5 vs 4.

In terms of curb weight, Renault Symbioz is visibly lighter – 1,359 kg compared to 1,765 kg. The difference is around 406 kg.

Looking at boot space, the Renault Symbioz offers visibly more boot space – 576 L compared to 385 L. That’s a difference of about 191 L.

When it comes to payload, the Renault Symbioz carries only slightly more – 459 kg compared to 420 kg. That’s a difference of about 39 kg.

Who wins the race in the data check?

The BMW 4 Series Convertible 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 £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
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Frequently compared as well

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Renault Symbioz
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BMW 4 Series Convertible
Renault Symbioz

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.

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Reviews BMW 4 Series Convertible

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

Renault Symbioz

The Renault Symbioz is a forward-looking concept car that imagines a seamless link between vehicle and home, pairing a lounge-like cabin with striking, futuristic styling. More idea than production plan, it showcases Renault's vision for connected, autonomous and sustainable mobility while provoking debate about how we will live and travel.

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Reviews Renault Symbioz

4.8 (5 Reviews)
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PF
19 Feb 2026, 11:56:45

A delightful hybrid (family car). Roomy, quick (combined nearly 150 hp) and safe.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Michael
5 Dec 2025, 23:17:28

I've been driving the Symbioz Full Hybrid with the iconic trim for 3,500 km. I test-drove both cars. I think the win goes to the Symbioz. Good quality at a family-friendly price. Unfortunately the Opel is simply too expensive. Strangely, what never really gets mentioned is that the Symbioz's suspension is absolutely superb.

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BMW 4 Series Convertible
Renault Symbioz

Costs and Consumption
Price
52,600 - 97,800 £
Price
24,700 - 31,100 £
Consumption L/100km
5.2 - 10.2 L/100km
Consumption L/100km
4.5 - 6 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
136 - 231 g/km
co2
102 - 136 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
SUV
Seats
4
Seats
5
Doors
-
Doors
-
Curb weight
1,765 - 2,055 kg
Curb weight
1,359 - 1,465 kg
Trunk capacity
385 L
Trunk capacity
492 - 576 L
Length
-
Length
-
Width
1,852 - 1,887 mm
Width
1,797 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
345 - 420 kg
Payload
455 - 459 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol, Petrol MHEV
Engine Type
Full Hybrid, Petrol MHEV
Transmission
Automatic
Transmission
Automatic, Manuel
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox, 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
140 - 158 HP
Acceleration 0-100km/h
3.7 - 8.2 s
Acceleration 0-100km/h
9.1 - 11 s
Max Speed
-
Max Speed
-
Torque
300 - 700 Nm
Torque
250 - 265 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
135 - 390 kW
Power kW
103 - 116 kW
Engine capacity
1,995 - 2,998 cm3
Engine capacity
1,332 - 1,789 cm3

General
Model Year
2,024 - 2,025
Model Year
2025
CO2 Efficiency Class
E, F, G
CO2 Efficiency Class
C, D, E
Brand
BMW
Brand
Renault
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.