1984 Buick Riviera
11 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| Riviera | 14 | 20 | 16 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Riviera | 14 | 20 | 16 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Riviera | 13 | 20 | 15 | Regular Gasoline | — | 3.8L 6-cyl Turbo | Automatic 4-spd |
| Riviera | 13 | 20 | 15 | Regular Gasoline | — | 4.1L 6-cyl | Automatic 4-spd |
| Riviera | 18 | 26 | 21 | Diesel | — | 5.7L 8-cyl | Automatic 4-spd |
| Riviera | 13 | 19 | 15 | Regular Gasoline | — | 4.1L 6-cyl | Automatic 4-spd |
| Riviera Convertible | 14 | 20 | 16 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Riviera Convertible | 13 | 20 | 15 | Regular Gasoline | — | 4.1L 6-cyl | Automatic 4-spd |
| Riviera Convertible | 14 | 20 | 16 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Riviera Convertible | 13 | 19 | 15 | Regular Gasoline | — | 4.1L 6-cyl | Automatic 4-spd |
| Riviera Convertible | 13 | 20 | 15 | Regular Gasoline | — | 3.8L 6-cyl Turbo | Automatic 4-spd |