1991 · Midsize Car · Gas
1991 Infiniti Q45 MPG & fuel economy
The 1991 Infiniti Q45 is a midsize car offered in 2 EPA-rated configurations. The most efficient version returns 17 MPG combined (15 city / 20 highway) on premium gasoline. Across the lineup, combined ratings range from 15 to 17 MPG. Efficiency is unchanged from the 1990 model. Among 42 midsize cars rated for 1991, it ranks 36th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $3,485 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 1991 Infiniti Q45's fuel average is 7.2 km/L (13.8 L/100 km), or 17 MPG combined: 6.4 km/L in the city and 8.5 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 15 | 6.4 | 15.7 |
| Highway | 20 | 8.5 | 11.8 |
| Combined | 17 | 7.2 | 13.8 |
How it ranks among 1991 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Q45 MPG across model years
Full history →2 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| RWD · 4.5L 8-cyl · 4-speed automatic Q45 |
Gas | 15 MPG | 20 MPG | 17 MPG | — | $3,485 |
| RWD · 4.5L 8-cyl · 4-speed automatic Q45 Full-Active Suspension |
Gas | 13 MPG | 17 MPG | 15 MPG | — | $3,950 |
Specs (most efficient configuration)
- Fuel
- Premium gasoline
- Engine / motor
- 4.5L 8-cyl
- Transmission
- 4-speed automatic
- Drivetrain
- RWD
- Passenger volume
- 95 cu ft
- Cargo volume
- 15 cu ft
- Tailpipe CO₂
- 523 g/mi
1991 Infiniti Q45 vs. rivals
Compare the 1991 Q45
With any other car from any year, including other Q45 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 1991 Infiniti Q45?
Up to 17 MPG combined (15 city / 20 highway); ratings range from 15 to 17 MPG depending on configuration.
What fuel does the 1991 Infiniti Q45 use?
Premium gasoline (premium is required or recommended by the manufacturer).
What is the fuel average in km/L for the 1991 Infiniti Q45?
The 1991 Infiniti Q45's fuel average is 7.2 km/L (13.8 L/100 km), or 17 MPG combined: 6.4 km/L in the city and 8.5 km/L on the highway.
How much does it cost to fuel the 1991 Infiniti Q45 per year?
About $3,485 at 15,000 miles a year with $3.95/gal premium gas, or $23.24 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.