SOLD on May 26, 2026

Elite Dealer

1991 Porsche 928

Michigan

$62,995

Vehicle Details

Make

Porsche

Model

928

Year

1991

Exterior Color

Gray

Interior Color

Gray

Transmission

Automatic

Drivetrain

RWD

Fuel Type

Gasoline

Engine

5.0L V8

Condition

Good

Description

1991 Porsche 928 S4 is finished in Slate Gray Metallic over a gray leather interior and was acquired in August 2023. Power is from a 5.0-liter V8 paired with a four-speed automatic transaxle. Equipment includes a sunroof, pop-up headlights, power accessories, automatic climate control, power-adjustable front seats, a rear window wiper, and a Pioneer CD stereo.

Modifications include 17" Turbo Twist wheels, GTS side mirrors, Hella H4 headlights, clear turn signal lenses with LED lights, LED instrument and interior lights, a tinted rear window, burl-wood trim, a custom shifter assembly, and stainless-steel door sill trim. The timing belt, brakes, spark plugs, distributor caps, and fluids were replaced in 2019. Service in preparation for sale included replacement of the tires, oil filler neck, air conditioning compressor, and power steering hose.

This 928 has 121k miles and is offered with manufacturer's literature, service records, a clean Carfax report, and a clean Georgia title. The car is finished in Slate Gray Metallic (Q9) and is equipped with front and rear spoilers, a sunroof, a dual-outlet exhaust, fog lights, and pop-up headlights. Modifications include GTS side mirrors, Hella H4 headlights, clear turn signal lenses with LED lights, smoked side marker lenses, and tinted taillights.

The hood is said to have been repainted, and photos of paint meter readings can be viewed in the gallery. Silver-finished 17' Turbo Twist wheels show a little curb scrape and are mounted with Hankook Ventus tires measuring 225/45 up front and 255/40 out back. Braking is supplied by four-wheel discs.

The cabin features power-adjustable front seats upholstered in gray leather as well as matching door panels and carpets. Burl-wood trim accents the front console, door, and rear air conditioning console. Additional features include a custom shifter handle, an aluminum shifter cover, a custom leather shifter boot, and stainless-steel door sill trim.

Amenities include power-adjustable seat

Porsche 928 Buyer's Guide

Full guide

Emily Chen

JDM Classics

1978–1995

~4 min read

Updated Apr 2026

The Porsche 928 was the car Porsche's board intended to replace the 911 — a front-engine, water-cooled V8 grand tourer of extraordinary engineering sophistication that 911 purists resisted for 18 years before the market ultimately vindicated them. Today the 928 is finally getting the respect it always deserved.

This guide covers

✓ 9-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 5 FAQs answered

✓ History & fun facts

Read the Full 928 Buyer's Guide

Porsche 928 Market Overview

Based on 16 Porsche 928 listings currently on ClassicCarsArena.com

Listed Now

$21,718

Avg. Asking Price

1973–1988

Year Range

Price Position on Our Site — Above Average

This car: $62,995

Low: $4,000 High: $39,495

Transmission Distribution

Automatic 38% ◄

Manual 50%

Condition Distribution

Good 19% ◄

Fair 13%

Data from ClassicCarsArena.com listings Browse all 16 listings →

Porsche 928 Buyer's Guide

Emily Chen here. The 928 is the Porsche I've spent the most time thinking about, because it forces you to confront a question: what is a Porsche for? The 911 answers that question one way — rear engine, air-cooled, inherently treacherous at the limit, demanding of its driver in ways that either frustrate or define you. The 928 answers it completely differently: front-mounted V8, water cooling, a transaxle that almost perfectly balances the weight, a sophisticated suspension, and enough power in the GTS form to embarrass contemporary supercars.

Porsche's board voted in 1972 to phase out the 911 and replace it with the 928. The engineers who built the 928 took that mandate seriously. What they produced was a genuine engineering landmark — arguably more sophisticated in every measurable dimension than the 911 of the same era. The fact that the 928 is no longer with us and the 911 is on its eighth generation tells you more about emotion than engineering.

What to Check Before Buying

✓

Timing Belt Service Date — Verify the last timing belt service date and mileage — budget immediate replacement if over 30,000 miles.

✓

Cooling System Configuration — Verify factory-original cooling system — non-factory modifications are the most common cause of overheating.

✓

Fuel Injection Operation — Cold start, warm idle, and full throttle should all be clean — injector o-ring deterioration is common.

✓

Transaxle Service History — Verify correct fluid type and proper level in the rear transaxle — incorrect service causes wear.

✓

Power Window Regulators — Test all windows — plastic regulator components crack with age, a common failure on all 928s.

✓

Air Conditioning — Test AC compressor engagement — compressor failures are common on 30+ year old systems.

✓

HVAC Vacuum System — Test all climate control functions — vacuum system leaks cause HVAC operation failures.

✓

Electrical Accessories — Test all Bosch electrical components — age-related failures are diagnostic indicators of overall care.

✓

VIN Registry Check — Cross-reference VIN against the 928 Owners Club registry for service and ownership history.

Common Issues

Timing belt failure from overdue service — catastrophic engine damage results. Cooling system failures from age or non-factory modifications. LH-Jetronic fuel injection issues from deteriorated fuel injector o-rings causing rough idle. Rear transaxle fluid level maintenance neglect. Power window regulator failures (plastic components age and crack). Air conditioning compressor failures from age. Early cars (1978–1982): distributor cap and rotor corrosion causing misfires. Climate control vacuum system leaks causing HVAC failures on S and earlier cars.

What to Look For

Timing belt service history is the non-negotiable first requirement. Verify the date and mileage of the last timing belt service — on any 928 with more than 30,000 miles since the last service, budget for immediate replacement before driving. On S4 and GTS models, inspect the cooling system for any non-factory modifications — the cooling system is complex and non-standard "improvements" typically cause problems. Check the LH-Jetronic or LH2 fuel injection system for proper operation: cold start, warm idle, and full-throttle response should all be clean. The rear transaxle has specific fluid requirements; verify it hasn't been overfilled or incorrectly serviced. On all 928s, test the air conditioning compressor engagement and all power accessories — Bosch electrical components of this era develop age-related failures that are diagnostic rather than catastrophic.

Price Guide

928 base (1978–1979): $14,000–$28,000. 928 S (1980–1986): $16,000–$32,000. 928 S4 (1987–1991): $22,000–$45,000. 928 GT (1989–1991): $28,000–$55,000. 928 GTS (1992–1995): $40,000–$85,000+. Documented service history adds 20–35% to any configuration. Cars with missing timing belt service history should be priced to include immediate belt service.

Did You Know?

The Porsche 928 won the European Car of the Year award for 1978, the only sports car ever to do so — the first time a non-American car had won the award. Porsche's board had planned for the 928 to replace the 911 entirely by the mid-1980s; customer resistance to the idea was so strong that the 911 survived and the 928 was discontinued in 1995 instead. The 928's galvanized body construction — applied to every car before painting — was nearly unique in the automotive industry in 1977 and explains why original-paint 928 bodies remain rust-free when comparable German cars of the era have corroded.

Elite Dealer

$62,995