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Mercedes GLA vs Porsche Cayenne comparison

Compare performance (421 HP vs 1,156 HP), boot space and price (38,800 £ vs 90,200 £ ) at a glance. Find out which car is the better choice for you – Mercedes GLA or Porsche Cayenne?

Mercedes GLA vs Porsche Cayenne: Key differences

Mercedes GLA

4.5 (4 Reviews)
rate
  • considerably cheaper
  • clearly more efficient
  • noticeably lighter
details

Porsche Cayenne

3.2 (3 Reviews)
rate
  • considerably more power
  • substantially more electric range
  • clearly quicker 0–100 km/h
  • considerably more trunk space
details

All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

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

GLA

Costs and Efficiency:

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 GLA is considerably cheaper – starting at 38,800 £ , while the Porsche Cayenne costs 90,200 £ . That’s a price difference of around 51,335 £.

Fuel consumption also shows a difference: the Mercedes GLA uses 2.9 L/100km and is clearly more efficient than the Porsche Cayenne with 4 L/100km. The difference is about 1.1 L/100km.

As for electric range, the Porsche Cayenne offers substantially more range – reaching up to 668 km, about 594 km more than the Mercedes GLA.

Cayenne

Engine and Performance:

Power, torque and acceleration say a lot about how a car feels on the road. This is where you see which model delivers more driving dynamics.

When it comes to engine power, the Porsche Cayenne offers considerably more power – delivering 1,156 HP compared to 421 HP. That’s roughly 735 HP more horsepower.

When accelerating from 0 to 100 km/h, the Porsche Cayenne is clearly 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 Cayenne delivers significantly more torque with 1,500 Nm compared to 500 Nm. That’s about 1,000 Nm more.

GLA

Space and Everyday Use:

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 GLA is noticeably lighter – 1,570 kg compared to 2,130 kg. The difference is around 560 kg.

Looking at boot space, the Porsche Cayenne offers considerably more boot space – 781 L compared to 435 L. That’s a difference of about 346 L.

When it comes to payload, the Porsche Cayenne carries clearly more – 705 kg compared to 500 kg. That’s a difference of about 205 kg.

Who wins the race in the data check?

The Porsche Cayenne 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.

from £90,200
Cayenne

Porsche Cayenne

  • Engine Type Petrol, Plug-in Hybrid, Electric
  • Transmission Automatic
  • Drive Type All-Wheel Drive
  • Power HP 353 - 1,156 HP
  • Consumption L/100km 4 - 11 L/100km
  • Consumption kWh/100km 18.9 - 20.6 kWh/100km
  • Electric Range 74 - 668 km
details

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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes GLA

The Mercedes GLA is a compact luxury crossover that brings Mercedes-Benz's refined design and premium cabin materials into a practical, city-friendly package. It combines comfortable ride quality and intuitive tech with poised handling, making it a confident choice for everyday driving and longer journeys.

details
20C0047_067
20C0047_071
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Reviews Mercedes GLA

4.5 (4 Reviews)
rate
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 Cayenne

Few SUVs blend athletic poise and Teutonic precision like the Porsche Cayenne, putting genuine sports‑car feeling into a roomy, everyday package. If you want a practical family hauler that still makes you grin every time you merge, the Cayenne delivers — turning errands into an excuse for a spirited drive.

details
P17_0701
P17_0780
P17_0777
P17_0776
P17_0784

Reviews Porsche Cayenne

3.2 (3 Reviews)
rate

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

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Porsche Cayenne

Costs and Consumption
Price
38,800 - 75,300 £
Price
90,200 - 144,400 £
Consumption L/100km
2.9 - 9.5 L/100km
Consumption L/100km
4 - 11 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
18.9 - 20.6 kWh/100km
Electric Range
74 km
Electric Range
74 - 668 km
Battery Capacity
-
Battery Capacity
-
co2
66 - 216 g/km
co2
0 - 249 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
SUV
Seats
5
Seats
4 - 5
Doors
-
Doors
-
Curb weight
1,570 - 1,810 kg
Curb weight
2,130 - 2,725 kg
Trunk capacity
385 - 435 L
Trunk capacity
434 - 781 L
Length
-
Length
-
Width
1,834 - 1,849 mm
Width
1,980 - 1,983 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
480 - 500 kg
Payload
525 - 705 kg

Engine and Performance
Engine Type
Petrol MHEV, Plug-in Hybrid, Diesel, Petrol
Engine Type
Petrol, Plug-in Hybrid, Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox, Reduction Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
116 - 421 HP
Power HP
353 - 1,156 HP
Acceleration 0-100km/h
4.3 - 11 s
Acceleration 0-100km/h
2.5 - 6 s
Max Speed
-
Max Speed
-
Torque
230 - 500 Nm
Torque
500 - 1,500 Nm
Number of Cylinders
4
Number of Cylinders
6
Power kW
85 - 310 kW
Power kW
260 - 850 kW
Engine capacity
1,332 - 1,991 cm3
Engine capacity
2,995 cm3

General
Model Year
2025
Model Year
2,025 - 2,026
CO2 Efficiency Class
E, F, B, G
CO2 Efficiency Class
G, B, A
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.