
The following table compares the fuel economies of different models of Porsche 928 cars, across model years.
The annual fuel costs (shown in the right-hand columns) are calculated based on an estimated annual mileage of 15,000 miles,
of which 55% of the miles are city driving, and 45% of the miles are highway driving.
Annual Cost 1 assumes a fuel cost of $5.00 per gallon, while Annual Cost 2 assumes a fuel cost of $6.00 per gallon.
| Model Year | Transmission | Cyl. | Combined MPG | City MPG |
Highway MPG |
Annual Cost 1 |
Annual Cost 2 |
|---|---|---|---|---|---|---|---|
| 1987 928 S | Automatic 4-speed | 8 | 16 | 15 | 20 | $4,437 | $5,325 |
| 1987 928 S | Manual 5-speed | 8 | 16 | 14 | 21 | $4,553 | $5,464 |
| 1986 928 S | Automatic 4-speed | 8 | 17 | 15 | 21 | $4,357 | $5,228 |
| 1986 928 S | Manual 5-speed | 8 | 17 | 15 | 22 | $4,284 | $5,140 |
| 1984 928 S | Automatic 4-speed | 8 | 15 | 14 | 18 | $4,821 | $5,785 |
| 1984 928 S | Manual 5-speed | 8 | 15 | 13 | 20 | $4,860 | $5,832 |
| 1984 928 S | Automatic 4-speed | 8 | 15 | 14 | 18 | $4,821 | $5,785 |
| 1984 928 S | Manual 5-speed | 8 | 15 | 13 | 20 | $4,860 | $5,832 |
| Model Year | Transmission | Cyl. | Combined MPG | City MPG |
Highway MPG |
Annual Cost 1 |
Annual Cost 2 |
|---|---|---|---|---|---|---|---|
| 1991 928 S4 | Automatic 4-speed | 8 | 15 | 14 | 17 | $4,931 | $5,918 |
| 1991 928 S4 | Manual 5-speed | 8 | 14 | 11 | 18 | $5,625 | $6,750 |
| 1991 928 S4 | Automatic 4-speed | 8 | 15 | 14 | 18 | $4,821 | $5,785 |
| 1990 928 S4 | Automatic 4-speed | 8 | 15 | 14 | 17 | $4,931 | $5,918 |
| 1990 928 S4 | Manual 5-speed | 8 | 14 | 11 | 18 | $5,625 | $6,750 |
| 1989 928 S4 | Automatic 4-speed | 8 | 15 | 14 | 17 | $4,931 | $5,918 |
| 1989 928 S4 | Manual 5-speed | 8 | 15 | 13 | 20 | $4,860 | $5,832 |
| 1989 928 S4 | Manual 5-speed | 8 | 14 | 11 | 18 | $5,625 | $6,750 |
| 1988 928 S4 | Automatic 4-speed | 8 | 16 | 15 | 20 | $4,437 | $5,325 |
| 1988 928 S4 | Manual 5-speed | 8 | 16 | 14 | 21 | $4,553 | $5,464 |
| Model Year | Transmission | Cyl. | Combined MPG | City MPG |
Highway MPG |
Annual Cost 1 |
Annual Cost 2 |
|---|---|---|---|---|---|---|---|
| 1995 928 GTS | Automatic 4-speed | 8 | 15 | 14 | 17 | $4,931 | $5,918 |
| 1995 928 GTS | Manual 5-speed | 8 | 13 | 11 | 17 | $5,735 | $6,882 |
| 1994 928 GTS | Automatic 4-speed | 8 | 15 | 14 | 17 | $4,931 | $5,918 |
| 1994 928 GTS | Manual 5-speed | 8 | 13 | 11 | 17 | $5,735 | $6,882 |
| 1993 928 GTS | Automatic 4-speed | 8 | 15 | 14 | 17 | $4,931 | $5,918 |
| 1993 928 GTS | Manual 5-speed | 8 | 13 | 11 | 17 | $5,735 | $6,882 |
Data source: Fuel Economy USA, Reference.