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2020 Kia Optima vs 2021 Mazda 6

📊 Key Differences
  • Fuel economy: 42 MPG vs 29 MPG combined — Kia Optima is more efficient
  • Annual fuel cost: $1400 vs $2050 — Kia Optima saves $ per year
  • Fuel type: Regular Gasoline vs Regular Gasoline
Specification 2020 Kia Optima 2021 Mazda 6
Year20202021
ClassMidsize CarsMidsize Cars
Fuel TypeRegular GasolineRegular Gasoline
DriveFront-Wheel DriveFront-Wheel Drive
TransmissionAutomatic (AM6)Automatic (S6)
Cylinders44
Displacement (L)2.02.5
City MPG4026
Highway MPG4535
Combined MPG4229
Annual Fuel Cost$1400$2050
CO₂ (g/mile)213.0302.0
EPA Fuel Economy Score9/106/10
EPA GHG Score9/106/10
Overall Safety5/5 ★
Frontal Crash5/5
Side Crash5/5
Rollover5/5
🚗 2020 Kia Optima

Midsize Cars with 42 MPG combined fuel economy. Runs on Regular Gasoline. Front-Wheel Drive drivetrain.

Full Kia Optima Profile →
🚗 2021 Mazda 6

Midsize Cars with 29 MPG combined fuel economy. Runs on Regular Gasoline. Front-Wheel Drive drivetrain.

Full Mazda 6 Profile →