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BMW X3 VS Mercedes B Class – Specs, Efficiency & Price Comparison

Which model is the better choice – the BMW X3 or the Mercedes B Class? We compare performance (398 HP vs 238 HP), boot capacity (570 L vs 455 L), efficiency (0.90 L vs 0.80 L), and of course, the price (50900 £ vs 33100 £).
Find out now which car fits your needs better!

The BMW X3 (SUV) is powered by a Petrol MHEV, Diesel MHEV or Plugin Hybrid engine and comes with a Automatic transmission. In comparison, the Mercedes B Class (MPV) features a Plugin Hybrid, Petrol MHEV or Diesel engine and a Automatic gearbox.

When it comes to boot capacity, the BMW X3 offers 570 L, while the Mercedes B Class provides 455 L – depending on what matters most to you. If you’re looking for more power, you’ll need to decide whether the 398 HP of the BMW X3 or the 238 HP of the Mercedes B Class suits your needs better.

There are also differences in efficiency: 0.90 L vs 0.80 L. In terms of price, the BMW X3 starts at 50900 £, while the Mercedes B Class is available from 33100 £.

Compare all the key specs now and find out which model fits your lifestyle best!

BMW X3

The BMW X3 stands out in the competitive SUV market with its refined blend of performance and luxury. Its interior boasts high-quality materials and a design focused on driver comfort and convenience. With a robust engine lineup, the vehicle offers a balanced driving experience that caters to both urban settings and off-road adventures.

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Mercedes B Class

The Mercedes-Benz B-Class offers a blend of practicality and luxury that sets it apart in the compact MPV segment. Its spacious and versatile interior is complemented by high-quality materials and a sleek design, making it ideal for both families and individuals seeking a touch of elegance on their daily commute. Advanced technology and safety features round out the package, ensuring a comfortable and secure driving experience.

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BMW X3
Mercedes B Class
X3
B Class

Costs and Consumption

Price
50900 - 72400 £
Price
33100 - 52500 £
Consumption L/100km
0.9 - 7.7 L
Consumption L/100km
0.8 - 6.9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
90 km
Electric Range
83 km
Battery Capacity
19.70 kWh
Battery Capacity
12.90 kWh
co2
21 - 175 g/km
co2
18 - 156 g/km
Fuel tank capacity
50 - 65 L
Fuel tank capacity
35 - 51 L

Dimensions and Body

Body Type
SUV
Body Type
MPV
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
1930 - 2140 kg
Curb weight
1405 - 1745 kg
Trunk capacity
460 - 570 L
Trunk capacity
405 - 455 L
Length
4755 mm
Length
4419 mm
Width
1920 mm
Width
1796 mm
Height
1660 mm
Height
1562 mm
Payload
570 kg
Payload
505 - 550 kg

Engine and Performance

Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatikgetriebe
Transmission Detail
Automat. Schaltgetriebe (Doppelkupplung)
Drive Type
All-Wheel Drive
Drive Type
Front-Wheel Drive, All-Wheel Drive
Power HP
197 - 398 HP
Power HP
116 - 238 HP
Acceleration 0-100km/h
4.6 - 7.8 s
Acceleration 0-100km/h
6.5 - 10 s
Max Speed
215 - 250 km/h
Max Speed
200 - 250 km/h
Torque
330 - 670 Nm
Torque
200 - 450 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
145 - 293 kW
Power kW
85 - 175 kW
Engine capacity
1995 - 2998 cm3
Engine capacity
1332 - 1991 cm3

General

Model Year
2024 - 2025
Model Year
2024 - 2025
CO2 Efficiency Class
F, E, B
CO2 Efficiency Class
B, D, E, F
Brand
BMW
Brand
Mercedes-Benz

BMW X3

Introducing the BMW X3: A Blend of Power and Innovation

The BMW X3 is a testament to the brand’s commitment to merging luxury with cutting-edge technology. This SUV not only offers impressive on-road performance but also showcases innovative features that cater to both petrolheads and eco-conscious drivers.

Powerful Performance Across the Range

The BMW X3 comes with various powertrain options to suit diverse driving preferences, ranging from efficient plug-in hybrids to powerful petrol and diesel mild-hybrids. With performance outputs ranging from 184 PS to an impressive 510 PS, the X3 proves its versatility on the road. Paired with BMW's renowned automatic transmission, each model offers a smooth and responsive driving experience complemented by the brand's xDrive all-wheel-drive system.

Leading-Edge Hybrid Technology

Among the X3's portfolio, the plug-in hybrid variants stand out with their optimal balance between efficiency and performance. These models boast electric-only ranges up to 90 km, ideal for urban driving with minimal emissions. Meanwhile, the mild-hybrid systems enhance efficiency by recuperating energy during deceleration and supporting the combustion engine, optimizing fuel consumption ranging from 0.9 L/100km to 10.8 L/100km depending on the model.

Contemporary Design with Practical Features

From a design perspective, the BMW X3 maintains its iconic SUV silhouette, characterized by robust proportions and sleek, aerodynamic lines. With dimensions of up to 4755 mm in length and a luggage capacity of up to 570 litres, it caters to both style enthusiasts and practical users. Additionally, the interior showcases BMW’s commitment to sophistication, featuring high-quality materials, state-of-the-art infotainment systems, and comprehensive driver-assistance technologies.

Efficiency Meets Performance

The X3's impressive performance figures are complemented by its responsible approach to CO2 emissions, aligning with EU efficiency standards. Enhanced by its comprehensive suite of driver aids and intelligent safety features, the X3 ensures both the thrill of driving and peace of mind.

Conclusion: The Ultimate Driving Companion

In essence, the BMW X3 represents the perfect intersection of dynamic performance, fuel efficiency, and modern-day technology. With options catering to diverse needs and preferences, it remains a leading choice for drivers seeking versatility, innovation, and luxury.

Mercedes B Class

A New Era of Compact Luxury: The Mercedes-Benz B-Class

The Mercedes-Benz B-Class represents a perfect blend of luxury, utility, and cutting-edge technology, standing as a testament to the brand’s commitment to innovation and class. This compact luxury MPV is tailored for motorists who seek practicality without compromising on performance and style.

Performance and Efficiency: A Comprehensive Overview

The new B-Class range comes with a selection of powertrains, including petrol mild-hybrids, diesels, and plug-in hybrids, ensuring a wide array of choices for every driving preference. The power output ranges from 116 to 238 PS, offering a harmonious balance of power and efficiency.

Among the exciting options, the plug-in hybrid variant stands out with a fuel consumption rate as low as 0.8 L/100km and an electric range of up to 83 km. The petrol and diesel engines offer impressive efficiency, with consumption ranging from 5.1 to 7.1 L/100km, catering to both environmental consciousness and driving pleasure.

Innovative Technology: Staying Ahead of the Curve

Inside the B-Class, drivers will find an array of technology designed to enhance the driving experience. The latest MBUX infotainment system comes with a high-resolution touchscreen, voice activation, and a suite of connectivity features, making each journey both intuitive and enjoyable.

Mercedes-Benz has also incorporated advanced driver-assistance systems, including adaptive cruise control and lane-keeping assist, to enhance safety and convenience. These features ensure that the B-Class not only keeps up with the demands of modern drivers but also anticipates them.

Design and Luxury: A Compact Model with Presence

The Mercedes-Benz B-Class has been designed to offer maximum interior comfort while maintaining a compact external profile. The vehicle’s aerodynamic shape is complemented by a stylish front fascia and distinctive body lines, giving it a dynamic yet elegant appearance.

Inside, the B-Class doesn't skimp on luxury. With a high-quality finish, ergonomic seating, and comprehensive climate control systems, it delivers a refined environment for driver and passengers alike, echoing the luxurious feel synonymous with the Mercedes-Benz brand.

Customisation and Price: Tailored to Individual Tastes

The B-Class provides ample customisation options across its variants. From Advanced to AMG Line, each offers a unique set of features and aesthetic touches, allowing buyers to tailor the vehicle to their personal tastes.

Pricing for the B-Class starts at €38,413 and can go up to €60,577, reflecting the range of configurations available. While some may see this as a premium investment, the comprehensive offering of features, efficiency, and luxury justifies the cost.

Conclusion: The Future of Compact Luxury is Here

The Mercedes-Benz B-Class remains a standout choice in the compact luxury segment, thanks to its combination of state-of-the-art technology, refined design, and performance efficiency. Whether you're considering practicality, luxury, or a bit of both, the B-Class is poised to meet your needs with aplomb.

The prices and data displayed are estimates based on German list prices and may vary by country. This information is not legally binding.