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BMW 4 Series Convertible vs Porsche Boxster - Differences and prices compared

Compare performance (530 HP vs 500 HP), boot space and price (52100 £ vs 136000 £ ) at a glance. Find out which car is the better choice for you – BMW 4 Series Convertible or Porsche Boxster?

BMW 4 Series Convertible

Porsche Boxster

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 has a clearly advantage in terms of price – it starts at 52100 £ , while the Porsche Boxster costs 136000 £ . That’s a price difference of around 83914 £.

Fuel consumption also shows a difference: BMW 4 Series Convertible manages with 5.20 L and is therefore convincingly more efficient than the Porsche Boxster with 12.70 L. The difference is about 7.50 L per 100 km.

4 Series Convertible

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 4 Series Convertible has a hardly perceptible edge – offering 530 HP compared to 500 HP. That’s roughly 30 HP more horsepower.

In acceleration from 0 to 100 km/h, the Porsche Boxster is hardly perceptible quicker – completing the sprint in 3.40 s, while the BMW 4 Series Convertible takes 3.70 s. That’s about 0.30 s faster.

In terms of top speed, the Porsche Boxster performs somewhat better – reaching 308 km/h, while the BMW 4 Series Convertible tops out at 250 km/h. The difference is around 58 km/h.

There’s also a difference in torque: BMW 4 Series Convertible pulls distinct stronger with 700 Nm compared to 450 Nm. That’s about 250 Nm difference.

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: BMW 4 Series Convertible offers significantly more seating capacity – 4 vs 2.

In curb weight, Porsche Boxster is slightly lighter – 1485 kg compared to 1765 kg. The difference is around 280 kg.

In terms of boot space, the BMW 4 Series Convertible offers decisively more room – 385 L compared to 122 L. That’s a difference of about 263 L.

When it comes to payload, BMW 4 Series Convertible distinct takes the win – 420 kg compared to 270 kg. That’s a difference of about 150 kg.

Who wins the race in the data check?

The BMW 4 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.

BMW 4 Series Convertible
Porsche Boxster

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis
from about £52,100
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
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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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Porsche Boxster

The Porsche Boxster epitomizes the essence of a pure, open-top driving experience with its mid-engine roadster design. Known for its agile handling and dynamic performance, the Boxster seamlessly blends luxury with thrilling precision on the road. Its unmistakable styling and superior engineering continue to captivate automotive enthusiasts who crave a visceral connection to the art of driving.

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Reviews BMW 4 Series Convertible

Reviews Porsche Boxster

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Porsche Boxster

Costs and Consumption
Price
52100 - 96600 £
Price
136000 £
Consumption L/100km
5.2 - 10.2 L
Consumption L/100km
12.70 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
136 - 231 g/km
co2
288 g/km
Fuel tank capacity
59 L
Fuel tank capacity
54 L

Dimensions and Body
Body Type
Convertible
Body Type
Roadster
Seats
4
Seats
2
Doors
2
Doors
2
Curb weight
1765 - 2055 kg
Curb weight
1485 kg
Trunk capacity
385 L
Trunk capacity
122 L
Length
4768 - 4770 mm
Length
4418 mm
Width
1852 - 1887 mm
Width
1822 mm
Height
1384 - 1394 mm
Height
1252 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
345 - 420 kg
Payload
270 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol, Petrol MHEV
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Dual-Clutch Automatic
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
184 - 530 HP
Power HP
500 HP
Acceleration 0-100km/h
3.7 - 8.2 s
Acceleration 0-100km/h
3.40 s
Max Speed
236 - 250 km/h
Max Speed
308 km/h
Torque
300 - 700 Nm
Torque
450 Nm
Number of Cylinders
4 - 6
Number of Cylinders
6
Power kW
135 - 390 kW
Power kW
368 kW
Engine capacity
1995 - 2998 cm3
Engine capacity
3996 cm3

General
Model Year
2024 - 2025
Model Year
2023
CO2 Efficiency Class
E, F, G
CO2 Efficiency Class
G
Brand
BMW
Brand
Porsche

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What drive types are available for the BMW 4 Series Convertible?

The BMW 4 Series Convertible is offered with Rear-Wheel Drive or All-Wheel Drive.

The prices shown are estimates based on German list prices, adjusted for local VAT. Local registration taxes (e.g. NoVA, BPM or CO2 malus) are not included. This information is not legally binding.