Infiniti Q50 vs BMW 5 Series
The Infiniti Q50 and BMW 5 Series are evenly matched on fuel economy — both peak at 31 mpg combined — so the decision comes down to engine choice, drivetrain, and class.
Across 2 measured categories, the BMW 5 Series leads in 2. Figures are EPA test data, not manufacturer claims.
Head-to-head specifications
| Metric | Infiniti Q50 | BMW 5 Series |
|---|---|---|
| Best combined MPG | 31 mpg | 31 mpg |
| Best city MPG | 29 mpg | 29 mpg |
| Best highway MPG | 36 mpg | 38 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $2,450 | $2,450 |
| Lowest CO2 output | 286 g/mi | 133 g/mi ✓ |
| Engines offered | SIDI, 3.5, 2.0, 3.7 | SIDI & PFI; PHEV, SIDI & PFI; Mild Hybrid, SIDI; PHEV, 2.0 |
| Transmissions | Automatic (S7) | Automatic (S8) |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | All-Wheel Drive, Rear-Wheel Drive |
| Fuel types | Premium | Premium and Electricity, Premium, Diesel |
| EPA class | Midsize Cars | Midsize Cars |
| Years covered | 2015–2024 | 2015–2027 |
| Configurations on record | 60 | 85 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Q50 vs 5 Series: common questions
Which is better on gas, the Infiniti Q50 or the BMW 5 Series?
The Infiniti Q50 and BMW 5 Series are evenly matched on fuel economy — both peak at 31 mpg combined — so the decision comes down to engine choice, drivetrain, and class.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the BMW 5 Series runs about $2,450 a year in fuel at its most efficient configuration, versus about $2,450 for the Infiniti Q50 — a difference of roughly $0 per year.
What engines do the Q50 and 5 Series offer?
Infiniti Q50: SIDI, 3.5, 2.0, 3.7. BMW 5 Series: SIDI & PFI; PHEV, SIDI & PFI; Mild Hybrid, SIDI; PHEV, 2.0.
Are they in the same vehicle class?
Yes — the EPA classifies both the Infiniti Q50 and the BMW 5 Series as Midsize Cars, so they compete directly.
More Q50 comparisons
Comparison id: infiniti-q50-vs-bmw-5-series