In-depth reviews

Kia Rio review - MPG, CO2 and Running Costs

The Rio offers decent fuel economy despite some old-tech powertrains, and the seven-year warranty should benefit residual values

Low running costs are often at the forefront of buyers’ minds when choosing a new supermini, and the Rio excels in that area. It's no longer the cheapest to buy any more, but it won’t cost the earth to fuel or maintain.

The entry level 1.25 litre petrol engine manages a claimed 58.8mpg combined and emits 109g/km of CO2. The 98bhp non-turbo 1.4 litre fairs slightly worse, managing 56.5mpg and emitting 114g/km of CO2. While those figures aren’t bad, and you’re more likely to be able to get near the MPG in the real world than you are with the turbo engines, they’re a bit off-the-pace considering the limited performance on offer. The dated four-speed automatic option on the 1.4 really worsens things, too, only managing 46.3mpg and emitting a whopping 140g/km of CO2. 

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The 1.0 litre turbo fares much better. In its cheapest form it undercuts both the naturally aspirated petrols on emissions, producing 102g/km of CO2, while managing a claimed combined economy figure of 62.8 mpg. Even the 118bhp version is a better bet, too, emitting 107g/km and managing 60.1mpg. 

If it’s fuel economy you’re after though, it’s diesel to the rescue again. The 1.4 litre CRDI unit manages a claimed 80.7mpg in its lowest powered form, though that only rises to 74.3mpg in the higher-powered version. CO2 emissions are 92g/km and 98g/km respectively. 

Insurance Groups

The Rio ranges fro Group 2 to Group 8 for insurance purposes, so it'll be relatively cheap to insure. Interestingly, 2 models get lower insurance ratings than the more basic 1 trim. That's because the base models go without some of the more advanced safety tech seen further up the range.


The Rio's seven-year, 100,000-mile warranty is transferrable between owners, which is a real selling point on the second hand market. However, residual values of around 40 per cent are fairly average in the supermini class.


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