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Mercedes GLA vs Porsche 911 Coupe comparison

Compare performance (421 HP vs 711 HP), boot space and price (38,800 £ vs 125,800 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLA or Porsche 911 Coupe?

Mercedes GLA vs Porsche 911 Coupe: Key differences

Mercedes GLA

4.5 (4 Reviews)
rate
  • considerably cheaper
  • significantly more efficient
  • slightly more trunk space
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Porsche 911 Coupe

  • significantly more power
  • considerably quicker 0–100 km/h
  • only slightly lighter
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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

GLA

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes GLA is considerably cheaper – starting at 38,800 £ , while the Porsche 911 Coupe costs 125,800 £ . That’s a price difference of around 86,992 £.

Fuel consumption also shows a difference: the Mercedes GLA uses 2.9 L/100km and is significantly more efficient than the Porsche 911 Coupe with 10.3 L/100km. The difference is about 7.4 L/100km.

911 Coupe

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 Porsche 911 Coupe offers significantly more power – delivering 711 HP compared to 421 HP. That’s roughly 290 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche 911 Coupe is considerably quicker – completing the sprint in 2.5 s, while the Mercedes GLA takes 4.3 s. That’s about 1.8 s quicker.

There’s also a difference in torque: the Porsche 911 Coupe delivers noticeably more torque with 800 Nm compared to 500 Nm. That’s about 300 Nm more.

GLA

Space and Everyday Use:

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

Seats: Mercedes GLA offers more seats – 5 vs 2.

In terms of curb weight, Porsche 911 Coupe is only slightly lighter – 1,536 kg compared to 1,570 kg. The difference is around 34 kg.

Looking at boot space, the Mercedes GLA offers slightly more boot space – 435 L compared to 373 L. That’s a difference of about 62 L.

When it comes to payload, the Mercedes GLA carries clearly more – 500 kg compared to 310 kg. That’s a difference of about 190 kg.

Who wins the race in the data check?

The Mercedes GLA holds a decisive overall lead 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 £38,800
GLA

Mercedes GLA

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel, Petrol
  • Transmission : Automatic
  • Drive Type : Front-Wheel Drive, All-Wheel Drive
  • Power HP : 116 - 421 HP
  • Consumption L/100km : 2.9 - 9.5 L/100km
  • Electric Range : 74 km
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Frequently compared as well

Mercedes B Class
Mercedes GLA
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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 …
Mercedes A Class
Mercedes GLA
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Mercedes GLA
Porsche 911 Coupe

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

4.5 (4 Reviews)
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Lucien
1 May 2026, 07:12:24

GLA 180 petrol. Ideal for city and highway. Very smooth and quiet. The automatic gearbox is a delight. Average consumption 6.2 L/100 km. Special edition 180 Cyber Edition, leather seats....

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
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

Porsche 911 Coupe

The Porsche 911 Coupe remains the iconic sports car you buy when you want a thrilling weekend weapon that still behaves like a civilized companion during the weekdays. Its classic silhouette and razor‑sharp handling deliver a grin-inducing drive every time, while the polished interior and intuitive controls remind you this is a car built for drivers, not just headlines.

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Reviews Porsche 911 Coupe

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

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Mercedes GLA
Porsche 911 Coupe

Costs and Consumption
Price
38,800 - 75,300 £
Price
125,800 - 301,000 £
Consumption L/100km
2.9 - 9.5 L/100km
Consumption L/100km
10.3 - 13.8 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
74 km
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
66 - 216 g/km
co2
233 - 312 g/km
Fuel tank capacity
-
Fuel tank capacity
63 - 64 L

Dimensions and Body
Body Type
SUV
Body Type
Coupe
Seats
5
Seats
2
Doors
-
Doors
2
Curb weight
1,570 - 1,810 kg
Curb weight
1,536 - 1,815 kg
Trunk capacity
385 - 435 L
Trunk capacity
373 L
Length
-
Length
4,542 - 4,570 mm
Width
1,834 - 1,849 mm
Width
1,852 - 1,900 mm
Height
-
Height
1,279 - 1,293 mm
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 500 kg
Payload
228 - 310 kg

Engine and Performance
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel, Petrol
Engine Type
Petrol, Full Hybrid
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
Rear-Wheel Drive, All-Wheel Drive
Power HP
116 - 421 HP
Power HP
394 - 711 HP
Acceleration 0-100km/h
4.3 - 11 s
Acceleration 0-100km/h
2.5 - 4.5 s
Max Speed
-
Max Speed
295 - 313 km/h
Torque
230 - 500 Nm
Torque
450 - 800 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
85 - 310 kW
Power kW
290 - 523 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
2,981 - 3,996 cm3

General
Model Year
2025
Model Year
2,024 - 2,026
CO2 Efficiency Class
E, F, B, G
CO2 Efficiency Class
G
Brand
Mercedes-Benz
Brand
Porsche
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.