Honda Civic vs Mazda 3
The Honda Civic is the more efficient of the two: it reaches 49 mpg combined versus 33 mpg for the Mazda 3, a 16 mpg advantage and costs about $600 less per year to fuel.
Across 5 measured categories, the Honda Civic leads in 5. Figures are EPA test data, not manufacturer claims.
Head-to-head specifications
| Metric | Honda Civic | Mazda 3 |
|---|---|---|
| Best combined MPG | 49 mpg ✓ | 33 mpg |
| Best city MPG | 50 mpg ✓ | 30 mpg |
| Best highway MPG | 47 mpg ✓ | 40 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $1,250 ✓ | $1,850 |
| Lowest CO2 output | 181 g/mi ✓ | 266 g/mi |
| Engines offered | SIDI, SIDI; Hybrid, 2.0, RNG=193 | SIDI, SIDI; With Cylinder Deactivation, SIDI; Without Cylinder Deactivation, SIDI; with i-ELOOP Technology Package |
| Transmissions | Manual 6-spd, Automatic (variable gear ratios), Automatic (AV-S7) | Automatic (S6), Manual 6-spd |
| Drivetrains | Front-Wheel Drive | 4-Wheel Drive, Front-Wheel Drive |
| Fuel types | Premium, Regular, CNG | Regular |
| EPA class | Midsize Cars | Midsize Cars |
| Years covered | 2015–2026 | 2015–2026 |
| Configurations on record | 132 | 97 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Civic vs 3: common questions
Which is better on gas, the Honda Civic or the Mazda 3?
The Honda Civic is the more efficient of the two: it reaches 49 mpg combined versus 33 mpg for the Mazda 3, a 16 mpg advantage and costs about $600 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Honda Civic runs about $1,250 a year in fuel at its most efficient configuration, versus about $1,850 for the Mazda 3 — a difference of roughly $600 per year.
What engines do the Civic and 3 offer?
Honda Civic: SIDI, SIDI; Hybrid, 2.0, RNG=193. Mazda 3: SIDI, SIDI; With Cylinder Deactivation, SIDI; Without Cylinder Deactivation, SIDI; with i-ELOOP Technology Package.
Are they in the same vehicle class?
Yes — the EPA classifies both the Honda Civic and the Mazda 3 as Midsize Cars, so they compete directly.
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Comparison id: honda-civic-vs-mazda-3