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Mercedes B Class vs SEAT Ateca comparison

Compare performance (238 HP vs 150 HP), boot space and price (33,100 £ vs 25,100 £ ) at a glance. Find out which car is the better choice for you – Mercedes B Class or SEAT Ateca?

Mercedes B Class vs SEAT Ateca: Key differences

Mercedes B Class

4.9 (5 Reviews)
rate
  • visibly more power
  • visibly quicker 0–100 km/h
details

SEAT Ateca

4.6 (5 Reviews)
rate
  • clearly cheaper
  • marginally more efficient
  • marginally lighter
  • somewhat 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

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 Ateca is clearly cheaper – starting at 25,100 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 8,024 £.

Fuel consumption also shows a difference: the SEAT Ateca uses 4.9 L/100km and is marginally more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 0.2 L/100km.

Ateca

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 visibly 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 visibly quicker – completing the sprint in 6.5 s, while the SEAT Ateca takes 9 s. That’s about 2.5 s quicker.

There’s also a difference in torque: the Mercedes B Class delivers marginally more torque with 400 Nm compared to 360 Nm. That’s about 40 Nm more.

B 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 Ateca is marginally lighter – 1,345 kg compared to 1,405 kg. The difference is around 60 kg.

Looking at boot space, the SEAT Ateca offers somewhat more boot space – 510 L compared to 455 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 525 kg. That’s a difference of about 25 kg.

Who wins the race in the data check?

The Mercedes B Class is clearly superior overall 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 …
SEAT Ateca
VW T-Roc
VS
The SEAT Ateca and the VW T‑Roc are two closely related compact crossover SUVs from the Volkswagen Group, each offering a blend of practicality, comfort and engaging driving manners. This comparison will highlight where the Ateca’s straightforward value and roomy practicality differ from the …
Mercedes B Class
SEAT Ateca

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)
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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 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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Reviews SEAT Ateca

4.6 (5 Reviews)
rate
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
Value for Money
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
Value for Money

Frequently compared as well

Hyundai Tucson
SEAT Ateca
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As compact SUVs that balance practicality and value, the Hyundai Tucson and SEAT Ateca are popular choices for buyers seeking everyday comfort with sensible running costs. This comparison cuts through the specs to show which model — the Tucson or the Ateca — suits your needs better, whether you …
Mercedes A Class
Mercedes B Class
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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 …
BMW 2 Series Active Tourer
Mercedes B Class
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The BMW 2 Series Active Tourer and the Mercedes B‑Class are the two leading compact MPVs for buyers who need practical space without the bulk of an SUV. The 2 Series Active Tourer leans toward a driver-focused, sharper feel, while the B‑Class prioritizes passenger comfort, flexible packaging and a …
CUPRA Ateca
SEAT Ateca
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The CUPRA Ateca turns the sensible family SUV into a pocket rocket with sharper suspension, a punchier engine and aggressive styling that makes commuting feel like a weekend trackday. If you prefer lower running costs, more comfort and smarter value, the SEAT Ateca is the clear choice — practical, …
Audi Q3
SEAT Ateca
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SEAT Ateca
Volvo XC40
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SEAT Ateca and Volvo XC40 go head-to-head: compare performance, space, features and price in one quick overview to see which model suits your daily driving, budget and lifestyle better. A clear, side-by-side look helps you make the smarter choice. || Unsure whether the SEAT Ateca or the Volvo XC40 …
CUPRA Terramar
SEAT Ateca
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The CUPRA Terramar serves up sharp handling, punchy powertrains and a premium, slightly flashy cabin that feels like the hot hatch’s grown-up, wearing an SUV’s clothes. The SEAT Ateca is the sensible alternative — roomier, cheaper to run and refreshingly unpretentious — perfect for buyers who want …
CUPRA Formentor
SEAT Ateca
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In a head-to-head comparison, the CUPRA Formentor and SEAT Ateca reveal distinct personalities, with the Formentor offering a sportier, coupe-inspired design and dynamic handling thanks to its performance-tuned CUPRA badge. The Ateca, a robust and more traditional SUV, excels in practicality and …
Mercedes B Class
SEAT Ateca

Costs and Consumption
Price
33,100 - 52,500 £
Price
25,100 - 36,900 £
Consumption L/100km
5.1 - 6.9 L/100km
Consumption L/100km
4.9 - 6.4 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
133 - 156 g/km
co2
129 - 144 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
1,345 - 1,514 kg
Trunk capacity
445 - 455 L
Trunk capacity
510 L
Length
-
Length
-
Width
1,796 mm
Width
1,841 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
515 - 550 kg
Payload
516 - 525 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel
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 - 238 HP
Power HP
116 - 150 HP
Acceleration 0-100km/h
6.5 - 10 s
Acceleration 0-100km/h
9 - 11 s
Max Speed
-
Max Speed
-
Torque
200 - 400 Nm
Torque
200 - 360 Nm
Number of Cylinders
4
Number of Cylinders
3 - 4
Power kW
85 - 175 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
D, E, F
CO2 Efficiency Class
E, 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.