The Porsche 928 928 S4 is one of 7 trims in the Porsche 928 range. This page lists the 15 equipment codes available on it for the United States market, grouped into 7 categories. Equipment fitted as standard on this trim is marked “Standard”; “No charge” marks no-cost options and “—” marks an option whose period price has not yet been sourced. Showing 1991 prices: “Not offered” marks equipment that wasn’t on that year’s order sheet, which is different from a price we haven’t sourced.
Body Style
928 S4
Standard Equipment
Fitted as standard on the 928 S4, at no charge. Configurable options are listed in the sections below.
Code
Equipment
Category
—
5.0-liter (4957 cc) 32-valve V8, 316 hp
Performance & Sound
—
5-speed manual or 4-speed automatic (MY1987-1989); 4-speed automatic only (MY1990-1991)
Transmission
—
Rear-wheel drive, rear transaxle
Transmission
—
16 x 7 front and 16 x 8 rear wheels, 225/50 VR16 and 245/45 VR16 tires
Wheels
Transmission
Code
Option
Price, 1991 (USD)
Ref
481
5-speed manual transaxle
Not offered
249
4-speed automatic transmission
—
Performance & Sound
Code
Option
Price, 1991 (USD)
Ref
221
Porsche variable-locking differential (PSD)
—
Chassis & Brakes
Code
Option
Price, 1991 (USD)
Ref
482
Tire pressure monitoring system
—
Exterior Design
Code
Option
Price, 1991 (USD)
Ref
650
Electric sunroof with wind deflector
No charge
418
Protective side moldings
No charge
—
Rear model designation
Not offered
—
Side model designation
Not offered
Seats
Code
Option
Price, 1991 (USD)
Ref
139
Heated front seats
$272
—
Supple (soft) leather seats
Not offered
340
Heated front passenger seat
$272
Comfort & Assistance
Code
Option
Price, 1991 (USD)
Ref
—
On-board computer
Not offered
562
Driver and passenger airbags
—
—
Increased-capacity air conditioning
No charge
Infotainment & Audio
Code
Option
Price, 1991 (USD)
Ref
—
Blaupunkt Reno cassette radio
Not offered
Missing something?
Got a build sheet or window sticker listing an option we don’t have? Add it. Everything gets checked before it goes in.
Sources
Compiled from period Porsche brochures, Porsche press releases and technical specifications, Porsche’s approved-wheel bulletins, US-market paint and specification listings, EPA fuel-economy data and, for model years no Porsche document covers, published reference works. Figures are provisional historical data provided without warranty.
For software and AI agents: this page as Markdown, this generation as JSON, and llms.txt for the whole dataset.