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Kia Stonic vs Mercedes G-Class comparison

Compare performance (115 HP vs 605 HP), boot space and price (20,400 £ vs 106,600 £ ) at a glance. Find out which car is the better choice for you – Kia Stonic or Mercedes G-Class?

Kia Stonic vs Mercedes G-Class: Key differences

Kia Stonic

4.6 (2 Reviews)
rate
  • substantially cheaper
  • substantially more efficient
  • significantly lighter
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Mercedes G-Class

  • considerably more power
  • considerably quicker 0–100 km/h
  • considerably more trunk space
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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

Stonic

Costs and Efficiency:

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

Kia Stonic is substantially cheaper – starting at 20,400 £ , while the Mercedes G-Class costs 106,600 £ . That’s a price difference of around 86,199 £.

Fuel consumption also shows a difference: the Kia Stonic uses 5.6 L/100km and is substantially more efficient than the Mercedes G-Class with 8.7 L/100km. The difference is about 3.1 L/100km.

G-Class

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 Mercedes G-Class offers considerably more power – delivering 605 HP compared to 115 HP. That’s roughly 490 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes G-Class is considerably quicker – completing the sprint in 4.4 s, while the Kia Stonic takes 10.7 s. That’s about 6.3 s quicker.

There’s also a difference in torque: the Mercedes G-Class delivers considerably more torque with 1,164 Nm compared to 200 Nm. That’s about 964 Nm more.

Stonic

Space and Everyday Use:

Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.

Both vehicles offer seating for 5 people.

In terms of curb weight, Kia Stonic is significantly lighter – 1,205 kg compared to 2,485 kg. The difference is around 1,280 kg.

Looking at boot space, the Mercedes G-Class offers considerably more boot space – 640 L compared to 352 L. That’s a difference of about 288 L.

When it comes to payload, the Mercedes G-Class carries clearly more – 715 kg compared to 445 kg. That’s a difference of about 270 kg.

Who wins the race in the data check?

The Mercedes G-Class is decisively ahead 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 £106,600
G-Class

Mercedes G-Class

  • Engine Type Petrol MHEV, Diesel MHEV, Electric
  • Transmission Automatic
  • Drive Type All-Wheel Drive
  • Power HP 387 - 605 HP
  • Consumption L/100km 8.7 - 14.7 L/100km
  • Consumption kWh/100km 28 kWh/100km
  • Electric Range 479 km
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Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Kia Stonic

The Kia Stonic is a compact crossover that pairs nimble city manners with a surprisingly spacious and comfortable cabin. It’s a practical, well-equipped choice for buyers who value sensible features, approachable styling and easy everyday usability.

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Reviews Kia Stonic

4.6 (2 Reviews)
rate
Jan
18 Mar 2026, 07:19:10

Very good car, uses little fuel, nothing's gone wrong in 4 years, no breakdowns.

How do you mainly use this car? (optional): Commuter (short/medium distance)
Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Technology & Infotainment
Safety
Practicality / Trunk & Everyday Use
Value for Money
Ennio
4 Feb 2026, 13:19:36

I'm very satisfied — I have a Stonic Black Edition hybrid, and I haven't had any problems after two years.

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

Mercedes G-Class

The G-Class, often called the G‑Wagen, is a blocky icon that blends unapologetic off-road prowess with a plush, modern cabin, announcing your arrival before you even step out. It’s equally at home crawling over rocks or cruising city streets, and owning one feels like adopting a very expensive, very capable personality.

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18C0997_133
19C0473_066
18C0997_262

Reviews Mercedes G-Class

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Costs and Consumption
Price
20,400 - 26,800 £
Price
106,600 - 171,000 £
Consumption L/100km
5.6 - 5.7 L/100km
Consumption L/100km
8.7 - 14.7 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
28 kWh/100km
Electric Range
-
Electric Range
479 km
Battery Capacity
-
Battery Capacity
-
co2
126 - 128 g/km
co2
0 - 336 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
SUV
Body Type
Off-Roader
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,205 - 1,270 kg
Curb weight
2,485 - 3,085 kg
Trunk capacity
352 L
Trunk capacity
640 L
Length
-
Length
-
Width
1,760 mm
Width
1,931 - 1,984 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
440 - 445 kg
Payload
115 - 715 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV
Engine Type
Petrol MHEV, Diesel MHEV, Electric
Transmission
Manuel, Automatic
Transmission
Automatic
Transmission Detail
Manual Gearbox, Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox, Reduction Gearbox
Drive Type
Front-Wheel Drive
Drive Type
All-Wheel Drive
Power HP
100 - 115 HP
Power HP
387 - 605 HP
Acceleration 0-100km/h
10.7 - 12.1 s
Acceleration 0-100km/h
4.4 - 5.8 s
Max Speed
-
Max Speed
-
Torque
172 - 200 Nm
Torque
760 - 1,164 Nm
Number of Cylinders
3
Number of Cylinders
6 - 8
Power kW
74 - 85 kW
Power kW
285 - 445 kW
Engine capacity
998 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2025
Model Year
2,025 - 2,026
CO2 Efficiency Class
D
CO2 Efficiency Class
G, A
Brand
Kia
Brand
Mercedes-Benz
Is the Kia Stonic offered with different drivetrains?

The Kia Stonic is offered with Front-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.