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BMW 4 Series Convertible vs Lexus RX comparison

Compare performance (530 HP vs 371 HP), boot space and price (52,600 £ vs 63,300 £ ) at a glance. Find out which car is the better choice for you – BMW 4 Series Convertible or Lexus RX?

BMW 4 Series Convertible vs Lexus RX: Key differences

BMW 4 Series Convertible

  • noticeably cheaper
  • clearly more power
  • considerably quicker 0–100 km/h
  • moderately lighter
details

Lexus RX

5 (1 Reviews)
rate
  • considerably more efficient
  • slightly more trunk space
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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:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

BMW 4 Series Convertible is noticeably cheaper – starting at 52,600 £ , while the Lexus RX costs 63,300 £ . That’s a price difference of around 10,672 £.

Fuel consumption also shows a difference: the Lexus RX uses 3.3 L/100km and is considerably more efficient than the BMW 4 Series Convertible with 5.2 L/100km. The difference is about 1.9 L/100km.

RX

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the BMW 4 Series Convertible offers clearly more power – delivering 530 HP compared to 371 HP. That’s roughly 159 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 4 Series Convertible is considerably quicker – completing the sprint in 3.7 s, while the Lexus RX takes 6.2 s. That’s about 2.5 s quicker.

There’s also a difference in torque: the BMW 4 Series Convertible delivers noticeably more torque with 700 Nm compared to 551 Nm. That’s about 149 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: Lexus RX offers more seats – 5 vs 4.

In terms of curb weight, BMW 4 Series Convertible is moderately lighter – 1,765 kg compared to 2,040 kg. The difference is around 275 kg.

Looking at boot space, the Lexus RX offers slightly more boot space – 461 L compared to 385 L. That’s a difference of about 76 L.

When it comes to payload, the Lexus RX carries visibly more – 620 kg compared to 420 kg. That’s a difference of about 200 kg.

Who wins the race in the data check?

The BMW 4 Series Convertible has the upper hand 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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Lexus RX
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Lexus RX

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.

Lexus RX

The Lexus RX glides through city streets with the kind of hushed refinement that turns mundane commutes into a private lounge. It mixes plush comfort and polished practicality in a package that suits buyers who want to arrive relaxed and a touch smug.

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Reviews Lexus RX

5 (1 Reviews)
rate
Angelo Ponte
16 May 2026, 14:16:35

Tried as a replacement car. The driving pleasure and comfort are unmatched by Alfa.

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Lexus RX
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BMW 4 Series Convertible
Lexus RX

Costs and Consumption
Price
52,600 - 97,800 £
Price
63,300 - 87,400 £
Consumption L/100km
5.2 - 10.2 L/100km
Consumption L/100km
3.3 - 8.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
67 km
Battery Capacity
-
Battery Capacity
-
co2
136 - 231 g/km
co2
75 - 183 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
2,040 - 2,185 kg
Trunk capacity
385 L
Trunk capacity
461 L
Length
-
Length
-
Width
1,852 - 1,887 mm
Width
1,920 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
345 - 420 kg
Payload
575 - 620 kg

Engine and Performance
Engine Type
Diesel MHEV, Petrol, Petrol MHEV
Engine Type
Full Hybrid, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Automatic Gearbox, CVT
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
184 - 530 HP
Power HP
207 - 371 HP
Acceleration 0-100km/h
3.7 - 8.2 s
Acceleration 0-100km/h
6.2 - 7.9 s
Max Speed
-
Max Speed
-
Torque
300 - 700 Nm
Torque
551 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
135 - 390 kW
Power kW
152 - 273 kW
Engine capacity
1,995 - 2,998 cm3
Engine capacity
2,393 - 2,487 cm3

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