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BMW 4 Series Convertible vs Lexus LM comparison

Compare performance (530 HP vs 206 HP), boot space and price (52,600 £ vs 109,700 £ ) at a glance. Find out which car is the better choice for you – BMW 4 Series Convertible or Lexus LM?

BMW 4 Series Convertible vs Lexus LM: Key differences

BMW 4 Series Convertible

  • significantly cheaper
  • considerably more power
  • noticeably more efficient
  • substantially quicker 0–100 km/h
  • markedly lighter
  • considerably more trunk space
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Lexus LM

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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 significantly cheaper – starting at 52,600 £ , while the Lexus LM costs 109,700 £ . That’s a price difference of around 57,086 £.

Fuel consumption also shows a difference: the BMW 4 Series Convertible uses 5.2 L/100km and is noticeably more efficient than the Lexus LM with 7.1 L/100km. The difference is about 1.9 L/100km.

LM

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 considerably more power – delivering 530 HP compared to 206 HP. That’s roughly 324 HP more horsepower.

When accelerating from 0 to 100 km/h, the BMW 4 Series Convertible is substantially quicker – completing the sprint in 3.7 s, while the Lexus LM takes 8.7 s. That’s about 5 s quicker.

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.

Seats: Lexus LM offers more seats – 7 vs 4.

In terms of curb weight, BMW 4 Series Convertible is markedly lighter – 1,765 kg compared to 2,345 kg. The difference is around 580 kg.

Looking at boot space, the BMW 4 Series Convertible offers considerably more boot space – 385 L compared to 110 L. That’s a difference of about 275 L.

When it comes to payload, the Lexus LM carries clearly more – 535 kg compared to 420 kg. That’s a difference of about 115 kg.

Who wins the race in the data check?

The BMW 4 Series Convertible stands well ahead of its rival 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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BMW 4 Series Convertible
Lexus LM

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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Lexus LM

The Lexus LM is a decadent, chauffeur-friendly people carrier that dresses up van practicality with yacht-like luxury and unmistakable Lexus polish. Inside it’s all about rear-seat pampering and serene refinement — perfect for buyers who want to arrive feeling like royalty, even if it’s not for the tightest budget or the smallest parking space.

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Reviews Lexus LM

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BMW 4 Series Convertible
Lexus LM

Costs and Consumption
Price
52,600 - 97,800 £
Price
109,700 - 131,900 £
Consumption L/100km
5.2 - 10.2 L/100km
Consumption L/100km
7.1 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
136 - 231 g/km
co2
160 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Convertible
Body Type
MPV
Seats
4
Seats
4 - 7
Doors
-
Doors
-
Curb weight
1,765 - 2,055 kg
Curb weight
2,345 kg
Trunk capacity
385 L
Trunk capacity
110 L
Length
-
Length
-
Width
1,852 - 1,887 mm
Width
1,890 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
345 - 420 kg
Payload
525 - 535 kg

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

General
Model Year
2,024 - 2,025
Model Year
2025
CO2 Efficiency Class
E, F, G
CO2 Efficiency Class
F
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.