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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
  • substantially more efficient
  • visibly quicker 0–100 km/h

SEAT Ateca

4.9 (3 Reviews)
rate
  • clearly cheaper
  • marginally lighter
  • somewhat 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.

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 Mercedes B Class uses 2.5 L/100km and is substantially more efficient than the SEAT Ateca with 4.9 L/100km. The difference is about 2.4 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 a bit more torque with 450 Nm compared to 360 Nm. That’s about 90 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 : Plugin Hybrid, Petrol MHEV, Diesel
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 238 HP
  • Consumption L/100km : 2.5 - 6.9 L/100km
  • Electric Range : 83 km
details

Frequently compared as well

Mercedes B Class
Mercedes GLA
VS
The Mercedes B‑Class is the practical, airy people‑carrier that prioritises space and comfort, while the Mercedes GLA takes the same mechanical smarts and adds SUV looks, higher ride height and a touch more road presence. Pick the B‑Class for family‑friendly sense and efficiency, choose the GLA if …
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 …
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.

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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 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

4.9 (3 Reviews)
rate

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

Frequently compared as well

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The SEAT Ateca is the sensible, roomy sibling that prioritises practicality and comfort, while the VW T‑Roc plays the cooler, more characterful role with sharper styling and a slightly cheekier drive — both share the VW Group's solid underpinnings and similar engines. Choose the Ateca if you need …
SEAT Ateca
Skoda Kamiq
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In the competitive compact SUV segment, the SEAT Ateca and Skoda Kamiq offer distinct yet appealing options for buyers. The Ateca impresses with its sporty design and responsive handling, making it a favorite among those who prioritize driving dynamics. Meanwhile, the Kamiq stands out for its …
Hyundai Tucson
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Ford Kuga
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CUPRA Ateca
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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 …
Mercedes B Class
SEAT Ateca

Costs and Consumption
Price
33,100 - 52,500 £
Price
25,100 - 36,900 £
Consumption L/100km
2.5 - 6.9 L/100km
Consumption L/100km
4.9 - 6.4 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
83 km
Electric Range
-
Battery Capacity
12.9 kWh
Battery Capacity
-
co2
56 - 156 g/km
co2
129 - 144 g/km
Fuel tank capacity
35 L
Fuel tank capacity
-

Dimensions and Body
Body Type
MPV
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
-
Curb weight
1,405 - 1,745 kg
Curb weight
1,345 - 1,514 kg
Trunk capacity
405 - 455 L
Trunk capacity
510 L
Length
4,419 mm
Length
-
Width
1,796 mm
Width
1,841 mm
Height
1,562 mm
Height
-
Max trunk capacity
1,440 L
Max trunk capacity
-
Payload
505 - 550 kg
Payload
516 - 525 kg

Engine and Performance
Engine Type
Plugin Hybrid, 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
223 km/h
Max Speed
-
Torque
200 - 450 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
2,024 - 2,025
Model Year
2,025
CO2 Efficiency Class
B, 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.