A3 vs i4
Shopping across brands means comparing different philosophies. The A3 and the i4 show how Audi and BMW each approach the compact luxury car class. On paper, these two are close. Only a handful of specs separate them by a margin you’d actually notice.
At a glance
- Engine & Performance i4 wins
- Space & Practicality Tie
- Off-road & Towing Tie
- Engine & Performance2.6
- Engine & Performance10.0
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
-
The i4 has 134 hp more power
Here the i4 pulls well ahead of the A3, with 335 hp compared to 201 hp. Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels.
-
The i4 has 96 lb-ft more torque
The i4 doesn’t just edge this one; 317 lb-ft against 221 lb-ft is a lead you’ll feel. The i4’s extra torque makes it more relaxed when fully loaded or towing.
Design & Size
Engine & Performance
i4 leads
Few areas are as clear-cut as this one: the i4 leads the engine & performance section with room to spare. In its favor, the i4 has 134 hp more power. More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board. For engine & performance, the i4 is the one to beat.
Total system output
A3: 201 hp i4: 335 hp The i4’s extra output gives it more in reserve when you need to get up to speed.
Torque
A3: 221 lb-ft i4: 317 lb-ft Electrified powertrains deliver torque instantly, so compare torque figures alongside the powertrain type.
Space & Practicality
Too close to call
This area ends level; whatever separates these two, it isn’t space & practicality. In short, space & practicality is a draw; the decision lies elsewhere.
Off-road & Towing
Too close to call
Neither the A3 nor the i4 has a real advantage in the off-road & towing category. Don’t let off-road & towing decide this one; look at the other sections instead.
Safety & Tech
For safety & tech, the differences are in the specifics (component names and types), so the table is the place to look.
Full Specifications
Engine & Performance
| Spec | A3 | i4 |
|---|---|---|
| Powertrain | Gas | Electric |
| Engine | 2.0L turbo I4 | Single rear electric motor |
| Total system output | 201 hp | 335 hp (winner) Most powerful in class |
| Torque | 221 lb-ft | 317 lb-ft (winner) Most torque in class |
| Transmission | 7-speed dual-clutch (S tronic) | 1-speed direct drive |
| Drivetrain | AWD (quattro) | RWD (xDrive AWD available) |
Fuel Economy & Range
| Spec | A3 | i4 |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 28 mpg | N/A (not specified) |
| Fuel economy (city) | 24 mpg | N/A (not specified) |
| Fuel economy (highway) | 34 mpg | N/A (not specified) |
| Electric range | N/A (not specified) | 318 mi |
Space & Practicality
| Spec | A3 | i4 |
|---|---|---|
| Seats | 5 seats | 5 seats |
Off-road & Towing
| Spec | A3 | i4 |
|---|---|---|
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | A3 | i4 |
|---|---|---|
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
“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 i4 if…
- you want more power (335 hp vs 201 hp)
- you want more pulling power from low speeds (317 lb-ft vs 221 lb-ft of torque)
- you’re loyal to BMW and happy with it
Also Compared
Frequently Asked Questions
Which is better for most people, the A3 or the i4?
On the specs compared here, the i4 makes more sense for most buyers; the A3 doesn’t win a single measurable area.
Executive Summary
Two companies, two answers to the same question. That’s how I see the A3 from Audi and the i4 from BMW. What I like most about the i4 here is 134 hp more power.
The A3 makes sense for anyone who values the things a spec sheet can’t capture; the i4 for anyone who values engine & performance.
My pick: the i4.
Personal opinion based on the data above. Your priorities may differ.