1988 Porsche 928 S4 Market Value & Price History
The 1988 Porsche 928 S4 has a current market value of $14,422 as of Oct 13, 2026, based on 81 verified auction sales tracked by DriveIndex, with half of the verified USD sales since 2014 between $21,500 and $35,200. Based on US sales through Aug 28, 2026. 8 have sold in the past 12 months, and 3 are listed for sale from $22,499 to $59,995. The median sale price is down 4.5% over the past 12 months versus the prior year.
Data: DriveIndex. 81 verified auction sales for the 1988 Porsche 928 S4 (75 in USD, the basis for every dollar figure here), latest sale Aug 28, 2026. Value as of Oct 13, 2026. Methodology
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Last checked Oct 6, 2026, unless a listing shows its own date
1988 Porsche 928 S4 Price History
The median 1988 Porsche 928 S4 sold for $28,400 in 2026, against $21,625 in 2017. Each row is the median of the verified sales recorded in that calendar year, so it moves with the mix of mileages and options that came to market as well as with the market itself.
| Year | Median sale | Sales |
|---|---|---|
| 2026 | $28,400 | 8 |
| 2025 | $29,750 | 9 |
| 2024 | $22,425 | 8 |
| 2023 | $34,725 | 6 |
| 2022 | $36,000 | 8 |
| 2021 | $29,700 | 9 |
| 2020 | $33,333 | 3 |
| 2019 | $26,033 | 8 |
| 2018 | $24,000 | 9 |
| 2017 | $21,625 | 4 |
Years with fewer than three verified USD sales are omitted — a one-sale “median” is a single car, not a market.
Recent 1988 Porsche 928 S4 Auction Results
| Sold | Price | Mileage | Gearbox |
|---|---|---|---|
| Aug 28, 2026 | $10,000 | 150,961 mi | Automatic |
| Aug 4, 2026 | $26,000 | 35,000 mi | Automatic |
| Jun 23, 2026 | $12,000 | 90,000 mi | Automatic |
| Jun 15, 2026 | $34,500 | 61,000 mi | Automatic |
| Mar 18, 2026 | $17,580 | 137,000 mi | — |
| Mar 14, 2026 | $48,500 | 30,000 mi | Automatic |
| Jan 27, 2026 | $38,500 | 63,000 mi | Automatic |
| Jan 9, 2026 | $30,800 | 44,972 mi | Automatic |
| Sep 11, 2025 | $16,430 | 213,000 mi | — |
| Aug 5, 2025 | $34,250 | 84,000 mi | — |
| Jul 10, 2025 | $16,050 | 119,268 mi | Automatic |
| Jun 29, 2025 | 28,750 CHF | — | Automatic |
| Jun 23, 2025 | $31,500 | 90,000 mi | Automatic |
| Jun 11, 2025 | $34,250 | 47,000 mi | Automatic |
| Jun 1, 2025 | $25,000 | 136,000 mi | — |
Verified results from the world's leading collector-car auction houses and marketplaces.
All Porsche 928 S4 auction results →See the full picture on the 1988 Porsche 928 S4
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Porsche 928 S4 by Year
Which 928 S4 year should you buy? Every year compared →1988 Porsche 928 S4: Frequently Asked Questions
How much is a 1988 Porsche 928 S4 worth?
A 1988 Porsche 928 S4 is worth approximately $14,422 as of Oct 13, 2026, based on 81 verified auction sales tracked by DriveIndex. Based on US sales through Aug 28, 2026. Half of all verified sales fall between $21,500 and $35,200; the full verified range is $10,000 to $96,500. Condition, mileage and options move an individual car within that band.
How much did a 1988 Porsche 928 S4 cost new?
The 1988 Porsche 928 S4 carried an original MSRP of $64,500. Verified examples now trade around $14,422.
How much has the 1988 Porsche 928 S4 depreciated?
The 1988 Porsche 928 S4 is worth about 78% less than it cost new: it carried an original MSRP of $64,500, and verified examples now trade around $14,422. That compares today's value with the sticker price, not adjusted for inflation.
How many 1988 Porsche 928 S4 sell per year?
8 have sold at auction in the past 12 months. DriveIndex has tracked 81 1988 Porsche 928 S4 sales in total.
Are 1988 Porsche 928 S4 sale prices higher or lower than a year ago?
The median 1988 Porsche 928 S4 sale price is down 4.5% over the past 12 months versus the prior year, based on verified auction sales. That figure tracks the median of what actually sold, so it moves with the mix of mileages and options that came to market as well as with the market itself. The full Value Signal classification (appreciating, stable, bottomed, or depreciating) and its 1–5 year projection are part of DriveIndex Pro.
Where can I buy a 1988 Porsche 928 S4?
DriveIndex lists 3 1988 Porsche 928 S4 for sale, priced from $22,499 to $59,995 (last checked Oct 6, 2026). DriveIndex aggregates for-sale listings and auction results from the world's leading collector-car auction houses and marketplaces.
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