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Mercedes GLA vs BMW X3 comparison

Compare performance (421 HP vs 398 HP), boot space and price (38,800 £ vs 51,300 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLA or BMW X3?

Mercedes GLA vs BMW X3: Key differences

Mercedes GLA

4.6 (3 Reviews)
rate
  • clearly cheaper
  • very slightly more power
  • barely quicker 0–100 km/h
  • visibly lighter

BMW X3

4.6 (1 Reviews)
rate
  • very slightly more efficient
  • moderately more electric range
  • markedly 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.

GLA

Introduction: The Battle of Compact SUVs - BMW X3 vs. Mercedes GLA

In the world of luxury compact SUVs, the BMW X3 and the Mercedes GLA stand out for their unique blend of style, performance, and innovation. Both vehicles compete vigorously in a market that increasingly emphasizes technology, efficiency, and satisfyingly engaging driving experiences. This article takes an in-depth look at how the BMW X3 and Mercedes GLA measure up in various aspects including performance, efficiency, interior comfort, and cutting-edge technology.

X3

Performance Prowess: Engines and Specs

When it comes to performance, the BMW X3 offers a range of engine options that emphasize both power and efficiency. With various configurations that include Diesel MHEV, Petrol MHEV, and Plugin Hybrid choices, the X3 boasts power outputs ranging from 184 HP to a staggering 510 HP in the high-performance M version. This SUV achieves 0-100 km/h acceleration times as low as 3.8 seconds and can reach a maximum speed of 250 km/h, providing thrilling performance for enthusiasts.

In comparison, the Mercedes GLA also delivers an impressive lineup of engines. From the 116 HP base model to the 421 HP AMG variant, the GLA has plenty of choices for performance-oriented drivers. Acceleration from 0-100 km/h can be as quick as 4.3 seconds for the AMG model, with a top speed that matches the X3 at 250 km/h. While the GLA may not offer as much high-end power in its base models, its agility and responsiveness keep it competitive.

GLA

Efficiency Matters: Fuel Consumption and Emissions

Both vehicles demonstrate advances in fuel efficiency, with the BMW X3 offering consumption figures as low as 2.1 L/100 km in its Plug-in Hybrid options. In contrast, the GLA's most economical engine consumes only 1 L/100 km, making it a solid choice for environmentally conscious consumers. When it comes to CO2 emissions, the GLA maintains an edge in lower emissions across many of its configurations, appealing to buyers looking for sustainability without compromising on luxury.

X3

Interior Quality and Comfort: A Class Apart

Inside the BMW X3, the focus is on luxury and spaciousness. With seating for up to five and trunk capacities ranging between 450 to 570 Liters, the X3 scores high on practicality. The interior boasts high-quality materials, an intuitive infotainment system, and ample passenger space, making it excellent for family use or road trips.

The Mercedes GLA offers a smaller trunk space, capping out at 435 liters, and while it still provides comfortable seating for five, the interior design reflects a sporty rather than a purely practical approach. The GLA is packed with luxurious features and offers a modern infotainment system that includes cutting-edge driver assistance technologies, maintaining a competitive edge in comfort and capability.

GLA

Technological Innovations: Leading the Pack

Both the BMW X3 and Mercedes GLA stand at the forefront of automotive technology. The X3 features BMW's iDrive system, integrating comprehensive navigation, infotainment, and voice-activated controls seamlessly. Notably, its advanced driver-assistance systems enhance safety, providing features like adaptive cruise control, lane-keeping assist, and parking assistance.

The GLA, on the other hand, showcases the Mercedes-Benz User Experience (MBUX), which includes a stunning infotainment display with advanced AI capabilities for personalized interactions. MBUX allows for intuitive voice commands, creating a more engaging driving experience. Additionally, the GLA incorporates advanced safety features that draw admiration across the luxury market.

X3

Conclusion: Which SUV Reigns Supreme?

Ultimately, choosing between the BMW X3 and Mercedes GLA comes down to personal preferences and what aspects matter most in an SUV. If you prefer performance and power coupled with practicality, the BMW X3 emerges as a fantastic choice. Meanwhile, for those who prioritize cutting-edge technology and a sporty design feel, the Mercedes GLA proves to be an attractive option. Both vehicles excel in their domains, making them worthy competitors in the ever-growing luxury compact SUV segment.

Frequently compared as well

Mercedes B Class
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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 …
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The Mercedes A‑Class is the sharper, more driver-focused hatch that feels nimble and refined on twisty roads, while the Mercedes GLA trades a bit of agility for SUV practicality with a higher ride height, extra luggage space and a commanding view of the road. Pick the A‑Class for sporty handling, …

Here’s where it gets real: The technical differences in detail

GLA

Costs and Efficiency:

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

Mercedes GLA is clearly cheaper – starting at 38,800 £ , while the BMW X3 costs 51,300 £ . That’s a price difference of around 12,421 £.

Fuel consumption also shows a difference: the BMW X3 uses 2.8 L/100km and is very slightly more efficient than the Mercedes GLA with 2.9 L/100km. The difference is about 0.1 L/100km.

As for electric range, the BMW X3 offers moderately more range – reaching up to 88 km, about 14 km more than the Mercedes GLA.

X3

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 Mercedes GLA offers very slightly more power – delivering 421 HP compared to 398 HP. That’s roughly 23 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes GLA is barely quicker – completing the sprint in 4.3 s, while the BMW X3 takes 4.6 s. That’s about 0.3 s quicker.

Looking at top speed, the BMW X3 is a bit faster – reaching 250 km/h, while the Mercedes GLA tops out at 210 km/h. The difference is around 40 km/h.

There’s also a difference in torque: the BMW X3 delivers markedly more torque with 670 Nm compared to 500 Nm. That’s about 170 Nm more.

GLA

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes GLA is visibly lighter – 1,570 kg compared to 1,930 kg. The difference is around 360 kg.

Looking at boot space, the BMW X3 offers markedly more boot space – 570 L compared to 435 L. That’s a difference of about 135 L.

For maximum load capacity, the BMW X3 offers somewhat more capacity – up to 1,700 L, about 315 L more than the Mercedes GLA.

When it comes to payload, the BMW X3 carries a bit more – 570 kg compared to 500 kg. That’s a difference of about 70 kg.

Who wins the race in the data check?

The BMW X3 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 £51,300
X3

BMW X3

  • Engine Type : Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission : Automatic
  • Drive Type : All-Wheel Drive
  • Power HP : 197 - 398 HP
  • Consumption L/100km : 2.8 - 7.7 L/100km
  • Electric Range : 88 km
details
Mercedes GLA
BMW X3

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes GLA

The Mercedes GLA blends Mercedes style with compact crossover practicality, looking sharper than its size suggests while still feeling purposeful around town. Inside it serves up premium materials and tech-forward ergonomics, and the composed ride makes it an appealing pick for buyers who want luxury wrapped in a city-friendly package with a wink of adventurous spirit.

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Reviews Mercedes GLA

4.6 (3 Reviews)
rate
Gutter
24 Feb 2026, 21:53:27

Super nimble, very impressive power from this 1,300cc mild‑hybrid engine — in town, on the road and on the motorway for this 2025 GLA 180 Style AMG... premium interior!

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
Serge
16 Jan 2026, 16:09:11

You have to compare like with like — the GLA should be compared to the Q3, not the Q2 as in your study!

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

BMW X3

The BMW X3 mixes Bavarian poise with everyday practicality, delivering a composed ride and a cabin that feels both premium and lived-in. It’s the sort of SUV that lets you enjoy sporty handling without sacrificing family-friendly space, so you get fun and sense in one neat package.

details
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Reviews BMW X3

4.6 (1 Reviews)
rate

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

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Mercedes GLA
BMW X3

Costs and Consumption
Price
38,800 - 75,300 £
Price
51,300 - 72,400 £
Consumption L/100km
2.9 - 9.5 L/100km
Consumption L/100km
2.8 - 7.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
74 km
Electric Range
88 km
Battery Capacity
12.9 kWh
Battery Capacity
-
co2
66 - 216 g/km
co2
64 - 175 g/km
Fuel tank capacity
35 L
Fuel tank capacity
60 - 65 L

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
1,570 - 1,810 kg
Curb weight
1,930 - 2,140 kg
Trunk capacity
385 - 435 L
Trunk capacity
460 - 570 L
Length
4,412 mm
Length
4,755 mm
Width
1,834 - 1,849 mm
Width
1,920 mm
Height
1,616 mm
Height
1,660 mm
Max trunk capacity
1,385 L
Max trunk capacity
1,700 L
Payload
480 - 500 kg
Payload
570 kg

Engine and Performance
Engine Type
Plugin Hybrid, Petrol MHEV, Diesel, Petrol
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
116 - 421 HP
Power HP
197 - 398 HP
Acceleration 0-100km/h
4.3 - 11 s
Acceleration 0-100km/h
4.6 - 7.8 s
Max Speed
210 km/h
Max Speed
215 - 250 km/h
Torque
230 - 500 Nm
Torque
330 - 670 Nm
Number of Cylinders
4
Number of Cylinders
4 - 6
Power kW
85 - 310 kW
Power kW
145 - 293 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
1,995 - 2,998 cm3

General
Model Year
2,024 - 2,025
Model Year
2,024 - 2,025
CO2 Efficiency Class
B, E, F, G
CO2 Efficiency Class
F, E, B
Brand
Mercedes-Benz
Brand
BMW
Is the Mercedes GLA offered with different drivetrains?

The Mercedes GLA 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.