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Mercedes GLA vs SEAT Ateca comparison

Compare performance (421 HP vs 150 HP), boot space and price (38,800 £ vs 25,100 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLA or SEAT Ateca?

Mercedes GLA vs SEAT Ateca: Key differences

Mercedes GLA

4.5 (4 Reviews)
rate
  • substantially more power
  • considerably more efficient
  • significantly quicker 0–100 km/h
details

SEAT Ateca

4.5 (6 Reviews)
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  • significantly cheaper
  • somewhat lighter
  • a bit more trunk space
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

GLA

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 Ateca is significantly cheaper – starting at 25,100 £ , while the Mercedes GLA costs 38,800 £ . That’s a price difference of around 13,731 £.

Fuel consumption also shows a difference: the Mercedes GLA uses 2.9 L/100km and is considerably more efficient than the SEAT Ateca with 4.9 L/100km. The difference is about 2 L/100km.

Ateca

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 Mercedes GLA offers substantially 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 GLA is significantly quicker – completing the sprint in 4.3 s, while the SEAT Ateca takes 9 s. That’s about 4.7 s quicker.

There’s also a difference in torque: the Mercedes GLA delivers visibly more torque with 500 Nm compared to 360 Nm. That’s about 140 Nm more.

GLA

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 Ateca is somewhat lighter – 1,345 kg compared to 1,570 kg. The difference is around 225 kg.

Looking at boot space, the SEAT Ateca offers a bit more boot space – 510 L compared to 435 L. That’s a difference of about 75 L.

When it comes to payload, the SEAT Ateca carries barely more – 525 kg compared to 500 kg. That’s a difference of about 25 kg.

Who wins the race in the data check?

The Mercedes GLA 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 £38,800
GLA

Mercedes GLA

  • Engine Type Petrol MHEV, Plugin Hybrid, Diesel, Petrol
  • Transmission Automatic
  • Drive Type Front-Wheel Drive, All-Wheel Drive
  • Power HP 116 - 421 HP
  • Consumption L/100km 2.9 - 9.5 L/100km
  • Electric Range 74 km
details

Frequently compared as well

Mercedes B Class
Mercedes GLA
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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 …
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Mercedes GLA
SEAT Ateca

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes GLA

The Mercedes GLA is a compact luxury crossover that brings Mercedes-Benz's refined design and premium cabin materials into a practical, city-friendly package. It combines comfortable ride quality and intuitive tech with poised handling, making it a confident choice for everyday driving and longer journeys.

details
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Reviews Mercedes GLA

4.5 (4 Reviews)
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Lucien
1 May 2026, 07:12:24

GLA 180 petrol. Ideal for city and highway. Very smooth and quiet. The automatic gearbox is a delight. Average consumption 6.2 L/100 km. Special edition 180 Cyber Edition, leather seats....

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
Gutter
24 Feb 2026, 21:53:27

Super nimble, very impressive power from this 1,300cc mild‑hybrid engine — in town, on the road and on the motorway for this 2025 GLA 180 Style AMG... premium interior!

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
Serge
16 Jan 2026, 16:09:11

You have to compare like with like — the GLA should be compared to the Q3, not the Q2 as in your study!

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 Ateca

The SEAT Ateca blends sharp, purposeful styling with practical space that turns everyday errands into something a bit more enjoyable. It’s poised and engaging to drive for its segment, offers solid value, and has just enough personality to make you smile on the school run.

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SEAT-Ateca_004

Reviews SEAT Ateca

4.5 (6 Reviews)
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editor
1 Jul 2026, 17:23:30

Exactly the right size. Just still suitable for families. The touchscreen is nicely integrated, not just a tablet stuck on — it flows into a console with the Virtual Cockpit and still has real buttons for the most important everyday functions. Perfect mix. My comparisons were the new 2er Active Tourer, the B‑Class and the Kia Sportage. The Ateca won for me overall by a clear margin, but it was a bit overpriced in comparison. And it wasn't my dream car. More a "practical car." Cheap is a thing of the past.

The speedo shows up to 218 km/h, but it really struggles to get beyond about 180. Above 150 km/h it also gets noticeably louder, but still acceptable. For people who like to glide along comfortably it's a very good choice; for those who like to drive fast, rather not. It handles dirt tracks well thanks to its ground clearance, and it also takes corners very well. Already somewhat sporty, agile.

Folding tow hitch, partially autonomous driving, lots of useful driver aids, a good multimedia concept, etc., as well as the very good seating position and controls make it attractive.

My previous 2.0L diesel was noticeably better to drive at higher speeds. But yes, times have changed. Not everything is perfect, but overall it has earned its 5 stars when you factor in the price and compare what you get for your money. 1.5 TSI Xperience DSG +XL + ***

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
Stefan
10 Jun 2026, 12:17:28

The Seat Ateca is a very affordable SUV with excellent handling and plenty of space for the whole family. A companion that can do it all and is equally suited to everyday use as to long trips fully loaded. A very good choice for the active family that needs a car that fits most needs.

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
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Nico
20 May 2026, 12:31:33

+ Great, firm seats, large boot for such a compact car, good fuel economy, lots of interior space, uncomplicated controls, very agile and safe handling, good build quality, very good steering, good braking performance, relatively small turning circle
- Very poor voice control and navigation, cockpit display too small with very small fonts and symbols, steering wheel too thin, seats too flat despite electric adjustment, poor engine soundproofing, tank far too small, complicated maintenance (oil change appalling), undersized rear brake, fuel filler on the wrong side, sound almost without bass (Beats)

How do you mainly use this car? (optional): Long-distance driver
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
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Mercedes GLA
SEAT Ateca

Costs and Consumption
Price
38,800 - 75,300 £
Price
25,100 - 36,900 £
Consumption L/100km
2.9 - 9.5 L/100km
Consumption L/100km
4.9 - 6.4 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
74 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
66 - 216 g/km
co2
129 - 144 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,570 - 1,810 kg
Curb weight
1,345 - 1,514 kg
Trunk capacity
385 - 435 L
Trunk capacity
510 L
Length
-
Length
-
Width
1,834 - 1,849 mm
Width
1,841 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 500 kg
Payload
516 - 525 kg

Engine and Performance
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel, Petrol
Engine Type
Petrol, Diesel
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
116 - 150 HP
Acceleration 0-100km/h
4.3 - 11 s
Acceleration 0-100km/h
9 - 11 s
Max Speed
-
Max Speed
-
Torque
230 - 500 Nm
Torque
200 - 360 Nm
Number of Cylinders
4
Number of Cylinders
3 - 4
Power kW
85 - 310 kW
Power kW
85 - 110 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
999 - 1,968 cm3

General
Model Year
2025
Model Year
2025
CO2 Efficiency Class
E, F, B, G
CO2 Efficiency Class
E, D
Brand
Mercedes-Benz
Brand
SEAT
Is the Mercedes GLA offered with different drivetrains?

The Mercedes GLA is available as 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.