2021 Kia Rio MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2021 Kia Rio.

The 2021 Kia Rio runs on regular gasoline and is in the Compact Cars car class.

Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 2021 Kia Rio is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2021 Kia Rio Get?

First off, the most commonly asked question. A 2021 Kia Rio gets up to 33 miles per gallon in the city, and 41 miles per gallon on the highway.

The combined average MPG for the 2021 Kia Rio is 36 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2021 Kia Rio?

The estimated fuel costs for the 2021 Kia Rio is $1,750 per year.

That value has been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

If you were to compare a 2021 Kia Rio to an average vehicle over 5 years, you will save $2,750 on fuel.

🛢 How Many Barrels of Petroleum Does a 2021 Kia Rio Consume?

The 2021 Kia Rio will consume roughly 8 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.

💨 How Many Grams of CO2 Does a 2021 Kia Rio Emit?

For every mile driven, the 2021 Kia Rio will emit 249 grams of CO2, which is about 3,735,000 grams of CO2 per year.

🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 128 trees would be needed to offset emissions from the 2021 Kia Rio.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2021 Kia Rio.

City MPG33
Highway MPG41
Combined MPG36
Save/Spend vs Average CarSave $2,750
Fuel Cost$1,750
Fuel Type 1Regular
Barrels of Petroleum8
Grams of CO23,735,000
Trees Needed to Offset178
DriveFront-Wheel Drive
Cylinders4
Displacement1.6
TransmissionAutomatic (AV-S1)
Vehicle ClassCompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Related Kia Models from 2021

If you're interested in other Kia models from 2021, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.

Link To or Reference This Page

If you use this page in your research, please reference MPG Buddy as the source.

  • "2021 Kia Rio MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/kia/rio/2021.

  • "2021 Kia Rio MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/kia/rio/2021. Accessed January 3, 2026.

  • 2021 Kia Rio MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/kia/rio/2021.