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BMW 4 Series Convertible vs Porsche 911 Convertible comparison

Compare performance (530 HP vs 711 HP), boot space and price (52,600 £ vs 138,000 £ ) at a glance. Find out which car is the better choice for you – BMW 4 Series Convertible or Porsche 911 Convertible?

BMW 4 Series Convertible vs Porsche 911 Convertible: Key differences

BMW 4 Series Convertible

  • clearly cheaper
  • significantly more efficient
  • only slightly more trunk space
details

Porsche 911 Convertible

  • noticeably more power
  • clearly quicker 0–100 km/h
  • slightly lighter
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By Achim Sedelmaier

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

4 Series Convertible

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

BMW 4 Series Convertible is clearly cheaper – starting at 52,600 £ , while the Porsche 911 Convertible costs 138,000 £ . That’s a price difference of around 85,372 £.

Fuel consumption also shows a difference: the BMW 4 Series Convertible uses 5.2 L/100km and is significantly more efficient than the Porsche 911 Convertible with 10.5 L/100km. The difference is about 5.3 L/100km.

911 Convertible

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 Porsche 911 Convertible offers noticeably more power – delivering 711 HP compared to 530 HP. That’s roughly 181 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche 911 Convertible is clearly quicker – completing the sprint in 2.6 s, while the BMW 4 Series Convertible takes 3.7 s. That’s about 1.1 s quicker.

There’s also a difference in torque: the Porsche 911 Convertible delivers somewhat more torque with 800 Nm compared to 700 Nm. That’s about 100 Nm more.

4 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.

Both vehicles offer seating for 4 people.

In terms of curb weight, Porsche 911 Convertible is slightly lighter – 1,572 kg compared to 1,765 kg. The difference is around 193 kg.

Looking at boot space, the BMW 4 Series Convertible offers only slightly more boot space – 385 L compared to 373 L. That’s a difference of about 12 L.

When it comes to payload, the BMW 4 Series Convertible carries a bit more – 420 kg compared to 345 kg. That’s a difference of about 75 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

BMW 4 Series Convertible
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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

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Porsche 911 Convertible

The Porsche 911 Cabriolet transforms the iconic silhouette into an open‑air weapon, offering roof-down glamour and razor-sharp handling that still feels perfectly composed on normal roads. It’s the kind of car that serves daily duties with surprising ease while delivering intoxicating engine music and a grin factor that makes every trip feel like a small victory.

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Reviews Porsche 911 Convertible

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

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BMW 4 Series Convertible
Porsche 911 Convertible

Costs and Consumption
Price
52,600 - 97,800 £
Price
138,000 - 244,500 £
Consumption L/100km
5.2 - 10.2 L/100km
Consumption L/100km
10.5 - 13.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
136 - 231 g/km
co2
237 - 310 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
Convertible
Seats
4
Seats
2 - 4
Doors
-
Doors
-
Curb weight
1,765 - 2,055 kg
Curb weight
1,572 - 1,900 kg
Trunk capacity
385 L
Trunk capacity
163 - 373 L
Length
-
Length
-
Width
1,852 - 1,887 mm
Width
1,852 - 1,900 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
345 - 420 kg
Payload
195 - 345 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol, Petrol MHEV
Engine Type
Petrol, Full Hybrid
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
Rear-Wheel Drive, All-Wheel Drive
Power HP
184 - 530 HP
Power HP
394 - 711 HP
Acceleration 0-100km/h
3.7 - 8.2 s
Acceleration 0-100km/h
2.6 - 4.7 s
Max Speed
-
Max Speed
-
Torque
300 - 700 Nm
Torque
450 - 800 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6
Power kW
135 - 390 kW
Power kW
290 - 523 kW
Engine capacity
1,995 - 2,998 cm3
Engine capacity
2,981 - 3,996 cm3

General
Model Year
2,024 - 2,025
Model Year
2,024 - 2,026
CO2 Efficiency Class
E, F, G
CO2 Efficiency Class
G
Brand
BMW
Brand
Porsche
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.