Civic vs Mazda3
The Civic and the Mazda3 are aimed squarely at each other: same class, different badges. Your answer depends on what you value. The Civic does better on fuel economy & range, and the Mazda3 does better on engine & performance.
At a glance
- Engine & Performance Mazda3 wins
- Fuel Economy & Range Civic wins
- Space & Practicality Civic wins
- Off-road & Towing Mazda3 wins
- Safety & Tech Mazda3 wins
- Engine & Performance0.1
- Fuel Economy & Range6.4
- Space & Practicality5.1
- Engine & Performance2.8
- Fuel Economy & Range4.8
- Space & Practicality4.4
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
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The Mazda3 has 41 hp more power
Big gap, real consequences. The Mazda3’s 191 hp versus the Civic’s 150 hp changes how the two compare in daily use. More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board.
-
The Civic has better fuel economy
The Mazda3 is clearly behind on fuel economy (combined) (31 mpg against 36 mpg), and that’s one of its biggest weak spots in this matchup. Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold.
-
The Mazda3 has 53 lb-ft more torque
On this line of the spec sheet, the Mazda3 is in a different league: 186 lb-ft, next to 133 lb-ft for the Civic. More torque means stronger pulling from low speeds, which you feel when accelerating from a stop or climbing grades.
-
The Civic has 12% more cargo space
On paper, the Civic is a touch ahead here, listing 14.8 cu ft against 13.2 cu ft. Cargo space behind the rear seats is what you use every day for groceries, strollers and luggage.
-
The Civic has better city fuel economy
For fuel economy (city), the Civic leads by a wide margin: 32 mpg versus 27 mpg. In town, driving style has a big effect, but the Civic starts from a better baseline.
Design & Size
- Civic 184.8 in × 70.9 in × 55.7 in
- Mazda3 183.5 in × 70.7 in × 56.9 in
The Civic and the Mazda3 take up almost exactly the same space.
Dimensions
| Spec | Civic | Mazda3 |
|---|---|---|
| Length | 184.8 in | 183.5 in |
| Width (no mirrors) | 70.9 in | 70.7 in |
| Height | 55.7 in | 56.9 in |
| Wheelbase | 107.7 in | 107.3 in |
Engine & Performance
Mazda3 leads
The Mazda3 is the clear pick if engine & performance is what you care about most. In its favor, the Mazda3 has 41 hp more power. The Mazda3’s extra output gives it more in reserve when you need to get up to speed. If engine & performance is your priority, the Mazda3 is the car to pick.
Total system output
Civic: 150 hp Mazda3: 191 hp Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels.
Torque
Civic: 133 lb-ft Mazda3: 186 lb-ft The Mazda3’s extra torque makes it more relaxed when fully loaded or towing.
Fuel Economy & Range
Civic leads
The Civic clearly takes the fuel economy & range round. The Civic stands out with better fuel economy. Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership. For anyone who cares most about fuel economy & range, the Civic is the safer choice.
Fuel economy (combined)
Civic: 36 mpg Mazda3: 31 mpg The Civic uses less fuel on the standard combined cycle, which matters most if you drive a lot.
Fuel economy (city)
Civic: 32 mpg Mazda3: 27 mpg City fuel economy matters most if your driving is mostly short trips, traffic and stop-and-go commutes.
Space & Practicality
Civic leads
If you’re keeping score, the space & practicality point goes narrowly to the Civic. The Civic makes its case with 12% more cargo space. The Civic’s larger cargo area makes family trips and big shopping runs easier. On space & practicality alone, the Civic gets the nod.
Cargo (behind rear seats)
Civic: 14.8 cu ft Mazda3: 13.2 cu ft Cargo figures are measured in different ways by different makers, so small gaps may not show in practice.
Off-road & Towing
Mazda3 leads
In the off-road & towing category, the Mazda3 is a step ahead rather than a leap ahead. On the Mazda3, you get available all-wheel drive. All-wheel drive helps you get going on slippery roads, but good tires matter just as much for stopping and turning. In short, the Mazda3 is the better-equipped car for off-road & towing.
AWD / 4WD available
Civic: no Mazda3: yes Available all-wheel drive improves traction in rain, snow and on loose surfaces.
Safety & Tech
Mazda3 leads
The Mazda3 does a little better in the safety & tech section, though nothing here is a deal-breaker for the Civic. The Mazda3 takes this one with a bigger 10.3 in touchscreen. Screen size isn’t everything (physical controls and software speed matter too), but bigger is easier to read. Anyone shopping mainly on safety & tech should start with the Mazda3.
Largest touchscreen
Civic: 9 in Mazda3: 10.3 in A bigger touchscreen makes maps and phone mirroring easier to read at a glance.
Full Specifications
Engine & Performance
| Spec | Civic | Mazda3 |
|---|---|---|
| Powertrain | Gas | Gas |
| Engine | 2.0L I4 | 2.5L I4 |
| Total system output | 150 hp | 191 hp (winner) |
| Torque | 133 lb-ft | 186 lb-ft (winner) |
| Transmission | CVT | 6-speed automatic |
| Drivetrain | FWD | FWD (AWD available) |
Fuel Economy & Range
| Spec | Civic | Mazda3 |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 36 mpg (winner) | 31 mpg |
| Fuel economy (city) | 32 mpg (winner) | 27 mpg |
| Fuel economy (highway) | 41 mpg (winner) | 37 mpg |
| Fuel tank | 12.4 gal | N/A (not specified) |
Space & Practicality
| Spec | Civic | Mazda3 |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | 14.8 cu ft (winner) | 13.2 cu ft |
Off-road & Towing
| Spec | Civic | Mazda3 |
|---|---|---|
| AWD / 4WD available | No | Yes (winner) |
Safety & Tech
| Spec | Civic | Mazda3 |
|---|---|---|
| Largest touchscreen | 9 in | 10.3 in (winner) |
| Driver-assist suite | Honda Sensing | Mazda i-Activsense |
| Basic warranty | 3 yr / 36,000 mi | 3 yr / 36,000 mi |
Dimensions
| Spec | Civic | Mazda3 |
|---|---|---|
| Length | 184.8 in | 183.5 in |
| Width (no mirrors) | 70.9 in | 70.7 in |
| Height | 55.7 in | 56.9 in |
| Wheelbase | 107.7 in | 107.3 in |
Price
| Spec | Civic | Mazda3 |
|---|---|---|
| Starting MSRP | $24,695 | N/A (not specified) |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Which One Should You Buy?
Choose the Civic if…
- you drive a lot and want lower running costs (36 mpg vs 31 mpg combined)
- you want more cargo space behind the rear seats (14.8 cu ft vs 13.2 cu ft)
- you want better city fuel economy (32 mpg vs 27 mpg)
- you cover long highway distances (41 mpg vs 37 mpg on the highway)
Choose the Mazda3 if…
- you merge, overtake or climb hills with a full load (191 hp vs 150 hp)
- you want more pulling power from low speeds (186 lb-ft vs 133 lb-ft of torque)
- you rely on navigation and phone mirroring on a larger display (10.3 in vs 9 in)
- you want all-wheel drive available
Also Compared
Frequently Asked Questions
Should I buy the Civic or the Mazda3?
It depends on your priorities: the Civic is stronger on fuel economy & range, while the Mazda3 leads on engine & performance.
Which is larger, the Civic or the Mazda3?
They’re practically the same size. The difference between the Civic and the Mazda3 is too small to matter.
Executive Summary
Whenever Honda and Mazda go head to head, I learn something about what each one cares about, and the Civic and the Mazda3 are no exception. Practically speaking, the Civic’s biggest advantage is better fuel economy. Nor should you ignore that the Civic has 12% more cargo space. In fairness to the Mazda3, 41 hp more power is a genuine strength.
In my head, the Civic is the fuel economy & range pick and the Mazda3 is the engine & performance pick.
My pick: I can’t crown one. The Civic wins on fuel economy & range, the Mazda3 on engine & performance, and your habits decide.
Personal opinion based on the data above. Your priorities may differ.