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Mercedes B Class vs SEAT Arona comparison

Compare performance (238 HP vs 150 HP), boot space and price (33,100 £ vs 20,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or SEAT Arona?

Mercedes B Class vs SEAT Arona: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • noticeably more power
  • barely more efficient
  • noticeably quicker 0–100 km/h
  • a bit more trunk space
details

SEAT Arona

4.9 (5 Reviews)
rate
  • clearly cheaper
  • somewhat lighter
details

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

B Class

Costs and Efficiency:

When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.

SEAT Arona is clearly cheaper – starting at 20,700 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 12,429 £.

Fuel consumption also shows a difference: the Mercedes B Class uses 5.1 L/100km and is barely more efficient than the SEAT Arona with 5.3 L/100km. The difference is about 0.2 L/100km.

Arona

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 Mercedes B Class offers noticeably more power – delivering 238 HP compared to 150 HP. That’s roughly 88 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes B Class is noticeably quicker – completing the sprint in 6.5 s, while the SEAT Arona takes 8.3 s. That’s about 1.8 s quicker.

There’s also a difference in torque: the Mercedes B Class delivers visibly more torque with 400 Nm compared to 250 Nm. That’s about 150 Nm more.

B Class

Space and Everyday Use:

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

Both vehicles offer seating for 5 people.

In terms of curb weight, SEAT Arona is somewhat lighter – 1,188 kg compared to 1,405 kg. The difference is around 217 kg.

Looking at boot space, the Mercedes B Class offers a bit more boot space – 455 L compared to 400 L. That’s a difference of about 55 L.

When it comes to payload, the Mercedes B Class carries very slightly more – 550 kg compared to 522 kg. That’s a difference of about 28 kg.

Who wins the race in the data check?

The Mercedes B Class 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.

from £33,100
B Class

Mercedes B Class

  • Engine Type Petrol MHEV, Diesel
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 238 HP
  • Consumption L/100km 5.1 - 6.9 L/100km
details

Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class and Mercedes GLA target buyers who want Mercedes practicality with premium touches, but they take different paths: the B‑Class is a spacious, hatchback-style people carrier while the GLA is a compact crossover with a higher ride height and sportier stance. This comparison looks …
Renault Captur
SEAT Arona
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The Renault Captur and SEAT Arona are two of Europe’s most popular compact crossovers, each offering a city-friendly footprint with raised driving position and SUV styling. This short comparison focuses on practicality, driving character, running costs and feature value to help you pick the one …
Mercedes B Class
SEAT Arona

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes B Class

The Mercedes B-Class is a smart, grown-up compact people carrier that dresses everyday practicality in a near‑premium polish, perfect for buyers who want comfort and a classy badge without the theatrics. It won’t set your pulse racing on a back road, but it will make school runs, commutes and grocery hauls feel pleasantly civilized — a reliable, slightly posh companion for real life.

details
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Reviews Mercedes B Class

4.9 (5 Reviews)
rate
Peter
5 Mar 2026, 05:51:19

My wife and I have been driving a Mercedes W247 200d for seven years now, with 93,000 km on the clock. The car is very comfortable even on long trips and economical. At the last service the pads of the electric parking brake were replaced; otherwise no repairs. We love this car.

How do you mainly use this car? (optional): Family car
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

SEAT Arona

The SEAT Arona is a compact crossover that blends practical, city-friendly packaging with a sporty, youthful design. It delivers a comfortable ride, an intuitive cabin and economical running costs, making it a sensible pick for daily drives and weekend getaways.

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Reviews SEAT Arona

4.9 (5 Reviews)
rate
Jorge Soares
29 May 2026, 20:19:35

É um excelente crossover...
Tem uma imagem desportiva e está bem equipado a nível de segurança e de tecnologia...
Tem uma óptima posição de condução...
É muito divertido de conduzir...
Só tenho pena de não trazer de fábrica o pneu sobresselente...

How do you mainly use this car? (optional): Commuter (short/medium distance)
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Jorge Soares
26 Mar 2026, 01:31:22

Comprei há 2 meses o Seat Arona novo DE 95 cv... ´Trata-se da versão base...
Estou muito contente com o mesmo...
Tem um ótima posição elevada da condução, é económico, tem uma bagageira com uma boa capacidade de arrumação...
Considero que este B Suv tem uma aparência bem desportiva e atraente...
Só tenho pena deste carro não ter instalados de fábrica os faróis dianteiros de nevoeiro, nem a câmara de ré acho que isto faz muita falta a nível da segurança da condução... Só a versão superior do carro é que traz instalada isto tudo...

How do you mainly use this car? (optional): City / Short distance
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money

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Mercedes A Class
Mercedes B Class
VS
The Mercedes A‑Class is the sporty, tech‑savvy compact that thrills with sharp handling and a slick cockpit, while the Mercedes B‑Class trades a bit of attitude for towering practicality, roomier seats and a more useful boot. Choose the A‑Class if you want driving fun and style; pick the B‑Class if …
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Think of the SEAT Arona as the chunky crossover that gives you a higher view of the road, more boot space and practical family-friendly packaging, while the SEAT Ibiza is the sharper, lighter hatch that’s more fun to hustle through town and returns better fuel economy. Pick the Arona if you want …
SEAT Arona
VW T-Cross
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The SEAT Arona and the VW T-Cross are closely matched compact crossovers aimed at buyers who want city-friendly dimensions, practical interiors and a touch of SUV style. This comparison focuses on space, fuel economy, driving feel, safety and running costs to help you decide which suits your …
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VW Taigo
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The SEAT Arona is the zesty city crossover that trades bravado for practicality, while the VW Taigo dresses up the same bones with a sleeker, coupé-like roofline — pick Arona for everyday sense and Taigo if style tops your shopping list. Both share VW Group underpinnings and efficient engines, so …
SEAT Arona
SEAT Leon
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City-smart crossover or grown-up hatchback — the SEAT Arona vs SEAT Leon is the clash many buyers face when choosing between style and substance. We take both on the road, test fuel use, boot space and driving feel, and pick the one that fits your commute, weekend plans and bank balance.
SEAT Arona
VW T-Roc
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Sibling rivalry in compact-SUV clothing: the SEAT Arona and VW T‑Roc go head-to-head — one brings Spanish spice and value, the other German polish and refinement. We’ll compare driving feel, practicality, tech and running costs so you can pick the compact crossover that deserves a spot in your …
Opel Mokka
SEAT Arona
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Deciding between the Vauxhall Mokka and the SEAT Arona means choosing between two compact crossovers that blend city-sized agility with SUV styling. This comparison cuts through trim levels and specs to focus on real-world driving, interior space, running costs and overall value so you can pick the …
Mercedes B Class
SEAT Arona

Costs and Consumption
Price
33,100 - 52,500 £
Price
20,700 - 30,300 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
5.3 - 5.8 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
120 - 132 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,405 - 1,565 kg
Curb weight
1,188 - 1,268 kg
Trunk capacity
445 - 455 L
Trunk capacity
400 L
Length
-
Length
-
Width
1,796 mm
Width
1,780 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
502 - 522 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
Engine Type
Petrol
Transmission
Automatic
Transmission
Manuel, Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive
Power HP
116 - 238 HP
Power HP
95 - 150 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
8.3 - 11.1 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
175 - 250 Nm
Number of Cylinders
4
Number of Cylinders
3 - 4
Power kW
85 - 175 kW
Power kW
70 - 110 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
999 - 1,498 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
D, E, F
CO2 Efficiency Class
D
Brand
Mercedes-Benz
Brand
SEAT
What drivetrain options does the Mercedes B Class have?

Available configurations include 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.