VS

Audi A3 Sportback vs Mercedes B Class comparison

Compare performance (400 HP vs 238 HP), boot space and price (27,000 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – Audi A3 Sportback or Mercedes B Class?

Audi A3 Sportback vs Mercedes B Class: Key differences

Audi A3 Sportback

3.9 (1 Reviews)
rate
  • visibly cheaper
  • considerably more power
  • clearly more efficient
  • significantly more electric range
  • significantly quicker 0–100 km/h
  • very slightly lighter

Mercedes B Class

4.9 (5 Reviews)
rate
  • slightly 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

A3 Sportback

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Audi A3 Sportback is visibly cheaper – starting at 27,000 £ , while the Mercedes B Class costs 33,100 £ . That’s a price difference of around 6,129 £.

Fuel consumption also shows a difference: the Audi A3 Sportback uses 1.1 L/100km and is clearly more efficient than the Mercedes B Class with 2.5 L/100km. The difference is about 1.4 L/100km.

As for electric range, the Audi A3 Sportback offers significantly more range – reaching up to 141 km, about 58 km more than the Mercedes B Class.

B Class

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 Audi A3 Sportback offers considerably more power – delivering 400 HP compared to 238 HP. That’s roughly 162 HP more horsepower.

When accelerating from 0 to 100 km/h, the Audi A3 Sportback is significantly quicker – completing the sprint in 3.8 s, while the Mercedes B Class takes 6.5 s. That’s about 2.7 s quicker.

Looking at top speed, the Audi A3 Sportback is very slightly faster – reaching 237 km/h, while the Mercedes B Class tops out at 223 km/h. The difference is around 14 km/h.

There’s also a difference in torque: the Audi A3 Sportback delivers marginally more torque with 500 Nm compared to 450 Nm. That’s about 50 Nm more.

A3 Sportback

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Both vehicles offer seating for 5 people.

In terms of curb weight, Audi A3 Sportback is very slightly lighter – 1,360 kg compared to 1,405 kg. The difference is around 45 kg.

Looking at boot space, the Mercedes B Class offers slightly more boot space – 455 L compared to 380 L. That’s a difference of about 75 L.

For maximum load capacity, the Mercedes B Class offers visibly more capacity – up to 1,440 L, about 340 L more than the Audi A3 Sportback.

When it comes to payload, the Mercedes B Class carries moderately more – 550 kg compared to 480 kg. That’s a difference of about 70 kg.

Who wins the race in the data check?

The Audi A3 Sportback 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 £27,000
A3 Sportback

Audi A3 Sportback

  • Engine Type : Petrol, Petrol MHEV, Diesel, Plugin Hybrid
  • Transmission : Manuel, Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 400 HP
  • Consumption L/100km : 1.1 - 9.3 L/100km
  • Electric Range : 134 - 141 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 …
Audi A3 Sportback
Mercedes B Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Audi A3 Sportback

The Audi A3 Sportback wraps premium materials and crisp German design into a practical hatchback package that makes daily driving feel smart rather than showy. It’s nimble in the city, composed on longer trips, and carries just enough swagger to satisfy buyers who want quality without shouting about it.

details
A202267_overfull
A202258_overfull
A202235_overfull
A202271_overfull
A201906_overfull
A202227_overfull

Reviews Audi A3 Sportback

3.9 (1 Reviews)
rate

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

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
18C0947_011
18C0947_009
18C0953_005
18C0953_035
18C0947_044

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

Frequently compared as well

Audi A3 Sportback
Audi Q2
VS
In the latest face-off between the Audi A3 Sportback and the Audi Q2, enthusiasts will find two distinct approaches to premium compact motoring. The A3 Sportback impresses with its sleek design and dynamic driving experience, while the Q2 offers a more adventurous, SUV-inspired stance that caters …
Audi A3 Sportback
VW T-Roc
VS
In the competitive realm of compact cars, the Audi A3 Sportback and VW T-Roc both offer distinct advantages that cater to different preferences. While the A3 Sportback boasts a premium interior and refined performance, the T-Roc shines with its versatility, spaciousness, and slightly higher driving …
BMW 2 Series Active Tourer
Mercedes B Class
VS
Unsure whether the BMW 2 Series Active Tourer or the Mercedes B Class is the better match? Compare both models directly and discover differences in power, efficiency, comfort and value for money — all summarized in one easy view to support your decision.
Audi A3 Sportback
CUPRA Leon
VS
When pitting the Audi A3 Sportback against the CUPRA León, enthusiasts are treated to a compelling clash of style and performance. The A3 Sportback excels with its premium interior and advanced tech features, while the CUPRA León stands out with its sporty dynamics and aggressive design. …
Mercedes B Class
Mercedes C Class Sedan
VS
The Mercedes B-Klasse and C-Klasse Limousine are distinct in their appeal, catering to different automotive preferences. The B-Klasse offers a spacious interior and versatility ideal for family-oriented buyers, while the C-Klasse Limousine crafts a more luxurious experience with its sleek design …
Audi A3 Sportback
SEAT Leon
VS
The Audi A3 Sportback and SEAT Leon compete for the top spot in your garage. See how both models differ in key areas like performance, running costs, interior space and technology. A fast, clear comparison helps you pick the one that fits your needs best.
Audi A3 Sportback
Audi A3 Limousine
VS
In a head-to-head comparison of the Audi A3 Sportback and Audi A3 Limousine, both models showcase the brand's commitment to luxury and performance, yet cater to slightly different preferences. The Sportback impresses with its versatile hatchback design, offering enhanced cargo space and …
Audi A3 Sportback
Audi Q3
VS
In a head-to-head comparison, the Audi A3 Sportback offers a more nimble and dynamic driving experience, perfect for urban environments and those who value agility. Meanwhile, the Audi Q3 stands out with its elevated ride height and spacious interior, catering to families and adventure seekers …
Audi A3 Sportback
Mercedes B Class

Costs and Consumption
Price
27,000 - 56,600 £
Price
33,100 - 52,500 £
Consumption L/100km
1.1 - 9.3 L/100km
Consumption L/100km
2.5 - 6.9 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
134 - 141 km
Electric Range
83 km
Battery Capacity
19.7 kWh
Battery Capacity
12.9 kWh
co2
25 - 211 g/km
co2
56 - 156 g/km
Fuel tank capacity
40 L
Fuel tank capacity
35 L

Dimensions and Body
Body Type
Hatchback
Body Type
MPV
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
1,360 - 1,685 kg
Curb weight
1,405 - 1,745 kg
Trunk capacity
280 - 380 L
Trunk capacity
405 - 455 L
Length
4,352 - 4,353 mm
Length
4,419 mm
Width
1,816 - 1,851 mm
Width
1,796 mm
Height
1,441 - 1,470 mm
Height
1,562 mm
Max trunk capacity
1,100 L
Max trunk capacity
1,440 L
Payload
410 - 480 kg
Payload
505 - 550 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel, Plugin Hybrid
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Dual-Clutch Automatic
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
116 - 400 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
3.8 - 10.1 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
225 - 237 km/h
Max Speed
223 km/h
Torque
220 - 500 Nm
Torque
200 - 450 Nm
Number of Cylinders
4 - 5
Number of Cylinders
4
Power kW
85 - 294 kW
Power kW
85 - 175 kW
Engine capacity
1,498 - 2,480 cm3
Engine capacity
1,332 - 1,991 cm3

General
Model Year
2,025
Model Year
2,024 - 2,025
CO2 Efficiency Class
D, F, E, G, B
CO2 Efficiency Class
B, D, E, F
Brand
Audi
Brand
Mercedes-Benz
What drive types are available for the Audi A3 Sportback?

The Audi A3 Sportback 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.