Photo: Pontiac Grand Prix by IFCAR, Public domain, via Wikimedia Commons. It shows the model, not always this exact version.
Pontiac · model year 1984
1984 Pontiac Grand Prix
Midsize · Diesel · EPA class: Midsize Cars
EPA figures · 1984fueleconomy.gov
21MPG combined
18/25MPG city / highway
$4,550fuel a year
485 g CO₂ per mile 5.7 L 8-cyl Automatic 3-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Every figure on record
- Combined MPG
- 21 MPG
- City MPG
- 18 MPG
- Highway MPG
- 25 MPG
- Annual fuel cost
- $4,550
- Tailpipe CO₂
- 485 g per mile
- Model year
- 1984
- Body
- Car
- EPA size class
- Midsize Cars
- Engine
- 5.7 L 8-cyl
- Transmission
- Automatic 3-spd
- Fuel
- Diesel
Efficiency
Running cost
The car
Powertrain
More Pontiac model years
1984 Pontiac Firebird
18 MPG · $3,700 fuel a year 1984 Pontiac Firebird
17 MPG · $3,950 fuel a year 1984 Pontiac Firebird
15 MPG · $4,450 fuel a year 1984 Pontiac Grand Prix
19 MPG · $3,550 fuel a year 1984 Pontiac Grand Prix
15 MPG · $4,450 fuel a year 1984 Pontiac Grand Prix
17 MPG · $3,950 fuel a year 1984 Pontiac Grand Prix
21 MPG · $4,550 fuel a year