2018 head-to-head · Compact Car
2018 Audi S4 vs Infiniti QX30
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 3.0L 6-cyl turbo · 8-speed dual-clutch · 24 MPG
The 2018 Infiniti QX30 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,194 a year to fuel (27 MPG), versus $2,469 for the 2018 Audi S4 (24 MPG). That's roughly $274 a year, or about $1,372 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Audi S4
- Infiniti QX30
Side by side
| Audi S4 | Infiniti QX30 | |
|---|---|---|
| $2,469 | Your annual fuel cost | $2,194 |
| 24 MPG | Combined efficiency | 27 MPG |
| 21 MPG | City | 24 MPG |
| 30 MPG | Highway | 33 MPG |
| 90 cu ft | Passenger volume | 89 cu ft |
| 13 cu ft | Cargo volume | 19 cu ft |
| 374 g/mi | Tailpipe CO₂ (g/mi) | 324 g/mi |
| 5/10 | EPA fuel economy score | 6/10 |
| 5/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 2.0L 4-cyl turbo |
| 8-speed dual-clutch | Transmission | 7-speed dual-clutch |
| AWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Audi S4 vs Infiniti QX30 across model years
- Audi S4
- Infiniti QX30
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Infiniti QX30 has more cargo space (19 vs. 13 cu ft).
Among 44 2018 compact cars, the Audi S4 ranks 39th and the Infiniti QX30 37th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2018 Audi S4 or the 2018 Infiniti QX30?
Measured by cost to drive, the Infiniti QX30. The Audi S4 is rated 24 MPG combined and the Infiniti QX30 27 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 Audi S4 vs. the Infiniti QX30 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,469 for the Audi S4 and $2,194 for the Infiniti QX30.
Which has more cargo space?
The Infiniti QX30, with 19 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
Audi S4 vs Infiniti QX30 in other years
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