1985 · Midsize Car · Diesel
1985 Buick Riviera Diesel MPG & fuel economy
The 1985 Buick Riviera Diesel is a midsize car with one EPA-rated configuration. The most efficient version returns 21 MPG combined (18 city / 26 highway) on diesel. Efficiency is unchanged from the 1984 model. Among 46 midsize cars rated for 1985, it ranks 33rd for lowest fuel cost. At 15,000 miles a year with $3.70/gal diesel fuel, it costs about $2,643 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 1985 Buick Riviera Diesel's fuel average is 8.9 km/L (11.2 L/100 km), or 21 MPG combined: 7.7 km/L in the city and 11.1 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 18 | 7.7 | 13.1 |
| Highway | 26 | 11.1 | 9.0 |
| Combined | 21 | 8.9 | 11.2 |
How it ranks among 1985 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Riviera Diesel MPG across model years
Full history →1 EPA-rated configuration
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 5.7L 8-cyl · 4-speed automatic Riviera |
Diesel | 18 MPG | 26 MPG | 21 MPG | — | $2,643 |
Specs (most efficient configuration)
- Fuel
- Diesel
- Engine / motor
- 5.7L 8-cyl
- Transmission
- 4-speed automatic
- Drivetrain
- FWD
- Passenger volume
- 100 cu ft
- Cargo volume
- 16 cu ft
- Tailpipe CO₂
- 485 g/mi
1985 Buick Riviera Diesel vs. rivals
Compare the 1985 Riviera Diesel
With any other car from any year, including other Riviera Diesel model years. Type a year to jump, e.g. "2015 Accord".
Same year, other powertrains: 1985 Buick Riviera (17 MPG)
Frequently asked questions
What is the gas mileage of the 1985 Buick Riviera Diesel?
Up to 21 MPG combined (18 city / 26 highway).
What fuel does the 1985 Buick Riviera Diesel use?
Diesel.
What is the fuel average in km/L for the 1985 Buick Riviera Diesel?
The 1985 Buick Riviera Diesel's fuel average is 8.9 km/L (11.2 L/100 km), or 21 MPG combined: 7.7 km/L in the city and 11.1 km/L on the highway.
How much does it cost to fuel the 1985 Buick Riviera Diesel per year?
About $2,643 at 15,000 miles a year with $3.70/gal diesel fuel, or $17.62 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.