Compare performance (272 HP vs 238 HP), boot space and price (38,200 £ vs 33,100 £ ) at a glance. Find out which car is the better choice for you – Audi Q3 or Mercedes B Class?
All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.
In the competitive world of compact premium vehicles, the Audi Q3 and Mercedes B-Klasse stand out as two formidable contenders. Both cars represent the commitment to luxury, innovation, and performance. In this article, we delve into a detailed comparison of these models, scrutinizing technical specifications, innovations, and overall appeal.
The Audi Q3 boasts the bold styling expected from an SUV, with a length of 4484 to 4500 mm, a width of 1843 to 1849 mm, and a height ranging from 1567 to 1585 mm. The exterior exudes a sense of robustness and modernity. On the other hand, the Mercedes B-Klasse adheres to a more compact MPV design, characterized by a length of 4419 mm, width of 1796 mm, and a height of 1562 mm, providing a sleeker appearance.
Under the hood, the Audi Q3 offers a dynamic range of petrol and diesel engines with power outputs ranging from 150 to 245 HP. Its transmission options include both manual and dual-clutch automatic variants, catering to a diverse driving preference, with both front-wheel and all-wheel-drive options. Notably, the Q3 accelerates from 0 to 100 km/h in as swift as 5.8 seconds and reaches top speeds up to 237 km/h.
The Mercedes B-Klasse carves its niche with a variety of efficient powertrains. Offering petrol MHEV, diesel, and plugin hybrid engines, it covers a power spectrum from 116 to 218 HP. The plug-in hybrid variant impresses with an electric range of 83 km. With a dual-clutch automatic transmission, the B-Klasse showcases smooth driveability, achieving 0 to 100 km/h in a competitive 6.5 seconds and maximum speeds up to 250 km/h.
Fuel consumption figures for the Audi Q3 vary from 5.5 to 8.5 L/100 km, offering reasonable efficiency for an SUV, paired with CO2 emissions spanning from 143 to 193 g/km. This places the Q3 in E, F, and G CO2 efficiency classes.
Conversely, the B-Klasse prides itself on lower consumption rates, especially in its hybrid incarnation, registering at only 0.8 L/100 km. Standard petrol and diesel engines range from 5.1 to 7.1 L/100 km. CO2 emissions are commendably low, from 18 to 160 g/km, positioning it mostly in the more favorable B to F efficiency classes.
Internally, both cars offer seating for five passengers. The Audi Q3 edges out slightly in trunk capacity with 530 L, an attractive feature for drivers prioritizing cargo space. The Mercedes B-Klasse provides a slightly more confined trunk space, ranging from 405 to 455 L, which is more than adequate for everyday use.
While both the Audi Q3 and Mercedes B-Klasse exhibit quintessential qualities of their respective brands, the choice ultimately depends on the individual priorities of potential owners. If a robust SUV with diverse performance options is preferred, the Audi Q3 is the clear choice. However, for those inclined towards eco-friendly technology with a focus on urban maneuverability, the Mercedes B-Klasse offers compelling advantages.
Whether it's the bold adventure-ready design of the Audi Q3 or the versatility and modernity of the Mercedes B-Klasse, both vehicles exemplify luxury and cutting-edge automotive innovation, set to impress even the most discerning drivers in the 2024 and 2025 line-ups.
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.
Mercedes B Class is a bit cheaper – starting at 33,100 £ , while the Audi Q3 costs 38,200 £ . That’s a price difference of around 5,099 £.
Fuel consumption also shows a difference: the Audi Q3 uses 1.7 L/100km and is clearly more efficient than the Mercedes B Class with 5.1 L/100km. The difference is about 3.4 L/100km.
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 Q3 offers moderately more power – delivering 272 HP compared to 238 HP. That’s roughly 34 HP more horsepower.
When accelerating from 0 to 100 km/h, the Audi Q3 is a bit quicker – completing the sprint in 5.7 s, while the Mercedes B Class takes 6.5 s. That’s about 0.8 s quicker.
Both models offer the same torque – 400 Nm.
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, Mercedes B Class is somewhat lighter – 1,405 kg compared to 1,635 kg. The difference is around 230 kg.
Looking at boot space, the Audi Q3 offers marginally more boot space – 488 L compared to 455 L. That’s a difference of about 33 L.
When it comes to payload, the Mercedes B Class carries barely more – 550 kg compared to 535 kg. That’s a difference of about 15 kg.
The Audi Q3 stands well ahead of its rival 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.
The Audi Q3 feels like a grown-up compact SUV with premium polish and city-friendly agility, the sort of car that makes weekend escapes and daily commutes equally satisfying. Inside, you get quality materials and smart packaging that keep things practical without skimping on style, so it’s an easy pick for buyers who want luxury without the drama.
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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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Costs and Consumption |
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Price
38,200 - 52,900 £
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Price
33,100 - 52,500 £
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Consumption L/100km
1.7 - 8.6 L/100km
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Consumption L/100km
5.1 - 6.9 L/100km
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Consumption kWh/100km
-
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Consumption kWh/100km
-
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Electric Range
118 - 119 km
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Electric Range
-
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Battery Capacity
-
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Battery Capacity
-
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co2
39 - 195 g/km
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co2
133 - 156 g/km
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Fuel tank capacity
-
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Fuel tank capacity
-
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Dimensions and Body |
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|---|---|
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Body Type
SUV
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Body Type
MPV
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Seats
5
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Seats
5
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Doors
-
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Doors
-
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Curb weight
1,635 - 1,900 kg
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Curb weight
1,405 - 1,565 kg
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Trunk capacity
375 - 488 L
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Trunk capacity
445 - 455 L
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Length
-
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Length
-
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Width
1,859 mm
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Width
1,796 mm
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Height
-
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Height
-
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Max trunk capacity
-
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Max trunk capacity
-
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Payload
505 - 535 kg
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Payload
515 - 550 kg
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Engine and Performance |
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|---|---|
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Engine Type
Petrol MHEV, Petrol, Plugin Hybrid, Diesel
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Engine Type
Petrol MHEV, Diesel
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Transmission
Automatic
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Transmission
Automatic
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Transmission Detail
Dual-Clutch Automatic
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Transmission Detail
Dual-Clutch Automatic
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Drive Type
Front-Wheel Drive, All-Wheel Drive
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Drive Type
Front-Wheel Drive, All-Wheel Drive
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Power HP
150 - 272 HP
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Power HP
116 - 238 HP
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Acceleration 0-100km/h
5.7 - 9.2 s
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Acceleration 0-100km/h
6.5 - 10 s
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Max Speed
-
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Max Speed
-
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Torque
250 - 400 Nm
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Torque
200 - 400 Nm
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Number of Cylinders
4
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Number of Cylinders
4
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Power kW
110 - 200 kW
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Power kW
85 - 175 kW
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Engine capacity
1,498 - 1,984 cm3
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Engine capacity
1,332 - 1,991 cm3
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General |
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|---|---|
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Model Year
2,025 - 2,026
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Model Year
2025
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CO2 Efficiency Class
E, G, B, F
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CO2 Efficiency Class
D, E, F
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Brand
Audi
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Brand
Mercedes-Benz
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Deutschland
France
Nederland
Great Britain
Sverige
Danmark
Suomi
Italia
Polska
España