1985 Buick Riviera
7 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| Riviera | 15 | 20 | 17 | Regular Gasoline | Front-Wheel Drive | 5L 8-cyl | Automatic 4-spd |
| Riviera | 15 | 21 | 17 | Regular Gasoline | Front-Wheel Drive | 5L 8-cyl | Automatic 4-spd |
| Riviera | 15 | 22 | 17 | Premium Gasoline | Front-Wheel Drive | 3.8L 6-cyl Turbo | Automatic 4-spd |
| Riviera | 18 | 26 | 21 | Diesel | Front-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| Riviera Convertible | 15 | 21 | 17 | Regular Gasoline | Front-Wheel Drive | 5L 8-cyl | Automatic 4-spd |
| Riviera Convertible | 14 | 22 | 17 | Premium Gasoline | Front-Wheel Drive | 3.8L 6-cyl Turbo | Automatic 4-spd |
| Riviera Convertible | 15 | 20 | 17 | Regular Gasoline | Front-Wheel Drive | 5L 8-cyl | Automatic 4-spd |