Porsche 928 S4: MPG and fuel economy by year

The EPA has rated the Porsche 928 S4 across 4 model years, from the 1988 Porsche 928 S4 through the 1991 Porsche 928 S4. The most recent 1991 Porsche 928 S4 returns 15 combined MPG. The most efficient model year was the 1988 Porsche 928 S4 at 16 MPG.

Pick a year below to open the full Porsche 928 S4 page for that model year. Each year page covers combined, city, and highway MPG, the trim variants the EPA rates separately, the annual fuel cost across three driving patterns, and a year-over-year comparison so you can see whether the car has improved.

Fuel economy by model year

Combined MPG, city MPG, highway MPG, and the EPA's estimated annual fuel cost for every model year of the Porsche 928 S4. Click any year to see the full breakdown for that model year, including trim variants, the drivetrain, and a comparison against other vehicles in its segment.

Year	Model	Combined MPG	City	Highway	Annual fuel cost
1991	1991 Porsche 928 S4	15 MPG	14 MPG	17 MPG	$4,600
1990	1990 Porsche 928 S4	15 MPG	14 MPG	17 MPG	$4,600
1989	1989 Porsche 928 S4	15 MPG	14 MPG	17 MPG	$4,600
1988	1988 Porsche 928 S4	16 MPG	15 MPG	20 MPG	$4,300

How the Porsche 928 S4 compares against the Minicompact Cars class

Buyers usually compare the Porsche 928 S4 against other cars in the same EPA class. The list below shows the most efficient cars in the Minicompact Cars class for the 1991 model year, the latest year on this page. Each link opens the full page for that car.

Source: U.S. EPA fuel economy dataset. Annual fuel cost assumes 15,000 miles of driving per year and a 55% city, 45% highway split.