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Mercedes A Class vs SEAT Arona comparison

Compare performance (421 HP vs 150 HP), boot space and price (32,600 £ vs 20,700 £ ) at a glance. Find out which car is the better choice for you – Mercedes A Class or SEAT Arona?

Mercedes A Class vs SEAT Arona: Key differences

Mercedes A Class

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

SEAT Arona

4.9 (2 Reviews)
rate
  • considerably cheaper
  • visibly lighter
  • a bit more trunk space

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

A Class

Costs and Efficiency:

Looking at overall running costs, both models reveal some interesting differences in everyday economy.

SEAT Arona is considerably cheaper – starting at 20,700 £ , while the Mercedes A Class costs 32,600 £ . That’s a price difference of around 11,868 £.

Fuel consumption also shows a difference: the Mercedes A Class uses 2.3 L/100km and is substantially more efficient than the SEAT Arona with 5.3 L/100km. The difference is about 3 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 A Class offers considerably more power – delivering 421 HP compared to 150 HP. That’s roughly 271 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes A Class is clearly quicker – completing the sprint in 3.9 s, while the SEAT Arona takes 8.3 s. That’s about 4.4 s quicker.

There’s also a difference in torque: the Mercedes A Class delivers significantly more torque with 500 Nm compared to 250 Nm. That’s about 250 Nm more.

A Class

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 5 people.

In terms of curb weight, SEAT Arona is visibly lighter – 1,188 kg compared to 1,440 kg. The difference is around 252 kg.

Looking at boot space, the SEAT Arona offers a bit more boot space – 400 L compared to 350 L. That’s a difference of about 50 L.

When it comes to payload, the SEAT Arona carries only slightly more – 522 kg compared to 485 kg. That’s a difference of about 37 kg.

Who wins the race in the data check?

The Mercedes A Class holds a decisive overall lead 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 £32,600
A Class

Mercedes A Class

  • Engine Type : Plugin Hybrid, Petrol MHEV, Diesel, Petrol
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 421 HP
  • Consumption L/100km : 2.3 - 9 L/100km
  • Electric Range : 85 km
details

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Mercedes A Class
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes A Class

The Mercedes A‑Class arrives as a compact charmer that dresses premium materials and a cockpit full of screens in a tidy, city-friendly package, delivering surprising agility and poise. For buyers who want a luxury badge, clever tech and a car that's equally happy in tight streets or on a spirited country run, the A‑Class offers a grown-up feel with a cheeky streak.

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Reviews Mercedes A Class

No reviews yet. Share your experience and help others decide.

SEAT Arona

The SEAT Arona is a cheeky urban crossover that mixes sharp styling with sensible practicality, making it an appealing choice for buyers who want personality without fuss. It’s zippy in traffic, comfortable enough for daily driving, and brings enough character to make routine journeys feel a little more fun.

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Reviews SEAT Arona

4.9 (2 Reviews)
rate
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
SEAT Arona

Costs and Consumption
Price
32,600 - 66,500 £
Price
20,700 - 30,500 £
Consumption L/100km
2.3 - 9 L/100km
Consumption L/100km
5.3 - 5.8 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
85 km
Electric Range
-
Battery Capacity
12.9 kWh
Battery Capacity
-
co2
53 - 205 g/km
co2
120 - 132 g/km
Fuel tank capacity
35 L
Fuel tank capacity
-

Dimensions and Body
Body Type
Hatchback
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
1,440 - 1,695 kg
Curb weight
1,188 - 1,268 kg
Trunk capacity
310 - 350 L
Trunk capacity
400 L
Length
4,428 mm
Length
-
Width
1,796 - 1,850 mm
Width
1,780 mm
Height
1,423 mm
Height
-
Max trunk capacity
1,125 L
Max trunk capacity
-
Payload
450 - 485 kg
Payload
502 - 522 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel, Petrol
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 - 421 HP
Power HP
95 - 150 HP
Acceleration 0-100km/h
3.9 - 9.7 s
Acceleration 0-100km/h
8.3 - 11.1 s
Max Speed
225 km/h
Max Speed
-
Torque
200 - 500 Nm
Torque
175 - 250 Nm
Number of Cylinders
4
Number of Cylinders
3 - 4
Power kW
85 - 310 kW
Power kW
70 - 110 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
999 - 1,498 cm3

General
Model Year
2,024 - 2,025
Model Year
2,025
CO2 Efficiency Class
B, D, E, G
CO2 Efficiency Class
D
Brand
Mercedes-Benz
Brand
SEAT
Is the Mercedes A Class offered with different drivetrains?

The Mercedes A Class 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.