Parkers overall rating: 3.8 out of 5 3.8

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 6.0 - 7.4 mpp
Diesel engines 7.0 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 44.8 - 55.4 mpg
Diesel engines 56.5 mpg
  • Stonic shouldn’t cost the earth to run
  • Low CO2 emissions and reasonable fuel economy
  • Kia’s finance deals aren’t always competitive, though

The Stonic isn’t a big car nor does it have a big engine, so it’s perhaps no surprise that it won’t cost a fortune in fuel.

There are only two engines, though they’re very similar to each other – and you don’t actually get a choice, as they’re linked to the spec levels. So if you opt for an entry-level car, you get a 1.0-litre turbocharged engine, and the three other trim levels have the same engine but with mild hybrid assistance to improve performance without sacrificing too much economy.

That means that if you buy a car in ‘2’ trim, the official WLTP fuel economy is 51.4mpg – whether you have a manual or an automatic gearbox.

Opt for the mild-hybrid engine in any of the other three trims and fuel economy is 50.4mpg for manual cars or 49.6mpg for the automatic. You might be surprised that the mild hybrid trickery doesn’t actually improve economy, but it remains pretty consistent with the standard engine despite having around 20% more power.

Our experience with the manual Stonic is that it’s fairly short geared – that makes for good responsiveness around town but does hurt fuel economy on long runs as the engine’s spinning faster than it could be. For that reason, the seven-speed DCT automatic is a better bet for those who regularly undertake motorway journeys.

CO2 emissions, meanwhile, are a low but not exceptional 125g/km for the standard turbo petrol, 127g/km for the manual mild hybrid and 129g/km for the automatic mild hybrid.

Servicing and maintenance

The Stonic requires servicing every 10,000 miles or 12 months, whichever comes sooner. Three- or five-year service plans are available when you purchase the car.


  • Kia offers excellent warranty
  • Stonic should prove reliable
  • No recalls or pervasive known faults

Kia’s clearly very confident in the quality of the Stonic, as it offers it with the same 7-year, 100,000 mile warranty cover as all the rest of its cars. And so far, that doesn’t seem misplaced.

The Stonic hasn’t had any recalls either, and Kia as a manufacturer is a pretty safe bet in terms of reliability.

Ongoing running costs

Road tax (12 months) £165
Insurance group 8 - 14
How much is it to insure?