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Alfa Romeo Junior vs BMW 4 Series Convertible comparison

Compare performance (280 HP vs 530 HP), boot space and price (26,100 £ vs 52,600 £ ) at a glance. Find out which car is the better choice for you – Alfa Romeo Junior or BMW 4 Series Convertible?

Alfa Romeo Junior vs BMW 4 Series Convertible: Key differences

Alfa Romeo Junior

4.9 (7 Reviews)
rate
  • substantially cheaper
  • barely more efficient
  • markedly lighter
  • only slightly more trunk space
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BMW 4 Series Convertible

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

Junior

Costs and Efficiency:

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

Alfa Romeo Junior is substantially cheaper – starting at 26,100 £ , while the BMW 4 Series Convertible costs 52,600 £ . That’s a price difference of around 26,528 £.

Fuel consumption also shows a difference: the Alfa Romeo Junior uses 4.8 L/100km and is barely more efficient than the BMW 4 Series Convertible with 5.2 L/100km. The difference is about 0.4 L/100km.

4 Series 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 BMW 4 Series Convertible offers clearly more power – delivering 530 HP compared to 280 HP. That’s roughly 250 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 Alfa Romeo Junior takes 5.9 s. That’s about 2.2 s quicker.

There’s also a difference in torque: the BMW 4 Series Convertible delivers considerably more torque with 700 Nm compared to 345 Nm. That’s about 355 Nm more.

Junior

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Seats: Alfa Romeo Junior offers more seats – 5 vs 4.

In terms of curb weight, Alfa Romeo Junior is markedly lighter – 1,380 kg compared to 1,765 kg. The difference is around 385 kg.

Looking at boot space, the Alfa Romeo Junior offers only slightly more boot space – 415 L compared to 385 L. That’s a difference of about 30 L.

Maximum payload is identical – both can carry up to 420 kg.

Who wins the race in the data check?

The BMW 4 Series Convertible leads convincingly 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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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Alfa Romeo Junior

The Alfa Romeo Junior captures the essence of Italian design with its sleek lines and compact dimensions, making it an icon of elegance and performance. With a spirited driving experience and a charming retro aesthetic, it appeals to enthusiasts and casual drivers alike. This delightful car embodies the brand's rich heritage while remaining a fun and engaging option for those seeking a unique automotive experience.

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AlfaRomeoJunior-Exterieur
AlfaRomeoJunior-Exterieur
AlfaRomeoJunior-Interieur

Reviews Alfa Romeo Junior

4.9 (7 Reviews)
rate
Jerzy
9 May 2026, 04:07:35

The car is a pleasure to drive — you don't want to get out. The navigation guides excellently, but Polish names are mispronounced. The car doesn't have cornering lights. The matrix headlights are very good.

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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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Alfa Romeo Junior
BMW 4 Series Convertible

Costs and Consumption
Price
26,100 - 41,600 £
Price
52,600 - 97,800 £
Consumption L/100km
4.8 - 5.4 L/100km
Consumption L/100km
5.2 - 10.2 L/100km
Consumption kWh/100km
15.1 - 17.5 kWh/100km
Consumption kWh/100km
-
Electric Range
344 - 410 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
0 - 119 g/km
co2
136 - 231 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Convertible
Seats
5
Seats
4
Doors
-
Doors
-
Curb weight
1,380 - 1,689 kg
Curb weight
1,765 - 2,055 kg
Trunk capacity
340 - 415 L
Trunk capacity
385 L
Length
-
Length
-
Width
1,781 mm
Width
1,852 - 1,887 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
390 - 420 kg
Payload
345 - 420 kg

Engine and Performance
Engine Type
Electric, Petrol MHEV
Engine Type
Diesel MHEV, Petrol, Petrol MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Reduction Gearbox, Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
146 - 280 HP
Power HP
184 - 530 HP
Acceleration 0-100km/h
5.9 - 9.1 s
Acceleration 0-100km/h
3.7 - 8.2 s
Max Speed
-
Max Speed
-
Torque
230 - 345 Nm
Torque
300 - 700 Nm
Number of Cylinders
3
Number of Cylinders
4 - 6
Power kW
107 - 207 kW
Power kW
135 - 390 kW
Engine capacity
1,199 cm3
Engine capacity
1,995 - 2,998 cm3

General
Model Year
2,024 - 2,025
Model Year
2,024 - 2,025
CO2 Efficiency Class
A, C, D
CO2 Efficiency Class
E, F, G
Brand
Alfa Romeo
Brand
BMW
What drivetrain options does the Alfa Romeo Junior have?

The Alfa Romeo Junior is offered with Front-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.