Mazda 3 vs Honda Civic
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 | Mazda 3 | Honda Civic |
|---|---|---|
| Best combined MPG | 33 mpg | 49 mpg ✓ |
| Best city MPG | 30 mpg | 50 mpg ✓ |
| Best highway MPG | 40 mpg | 47 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $1,850 | $1,250 ✓ |
| Lowest CO2 output | 266 g/mi | 181 g/mi ✓ |
| Engines offered | SIDI, SIDI; With Cylinder Deactivation, SIDI; Without Cylinder Deactivation, SIDI; with i-ELOOP Technology Package | SIDI, SIDI; Hybrid, 2.0, RNG=193 |
| Transmissions | Automatic (S6), Manual 6-spd | Manual 6-spd, Automatic (variable gear ratios), Automatic (AV-S7) |
| Drivetrains | 4-Wheel Drive, Front-Wheel Drive | Front-Wheel Drive |
| Fuel types | Regular | Premium, Regular, CNG |
| EPA class | Midsize Cars | Midsize Cars |
| Years covered | 2015–2026 | 2015–2026 |
| Configurations on record | 97 | 132 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
3 vs Civic: common questions
Which is better on gas, the Mazda 3 or the Honda Civic?
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 3 and Civic offer?
Mazda 3: SIDI, SIDI; With Cylinder Deactivation, SIDI; Without Cylinder Deactivation, SIDI; with i-ELOOP Technology Package. Honda Civic: SIDI, SIDI; Hybrid, 2.0, RNG=193.
Are they in the same vehicle class?
Yes — the EPA classifies both the Mazda 3 and the Honda Civic as Midsize Cars, so they compete directly.
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Comparison id: mazda-3-vs-honda-civic