1978 Porsche 911 SC Targa (G-Series) Market Value & Price History
The 1978 Porsche 911 SC Targa (G-Series) has a current market value of $49,914 as of Oct 13, 2026, based on 64 verified auction sales tracked by DriveIndex, with half of the verified USD sales since 2008 between $33,000 and $50,000. Based on US sales through Aug 27, 2026. 10 have sold in the past 12 months. The median sale price is up 11.7% over the past 12 months versus the prior year.
Data: DriveIndex. 64 verified auction sales for the 1978 Porsche 911 SC Targa (G-Series), latest sale Aug 27, 2026. Value as of Oct 13, 2026. Methodology
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The median 1978 Porsche 911 SC Targa (G-Series) sold for $53,000 in 2026, against $30,750 in 2015. 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 | $53,000 | 8 |
| 2025 | $49,000 | 8 |
| 2024 | $45,580 | 5 |
| 2023 | $43,680 | 7 |
| 2022 | $50,000 | 7 |
| 2021 | $45,250 | 9 |
| 2020 | $27,700 | 5 |
| 2019 | $32,000 | 4 |
| 2017 | $27,500 | 3 |
| 2015 | $30,750 | 4 |
Years with fewer than three verified USD sales are omitted — a one-sale “median” is a single car, not a market.
Recent 1978 Porsche 911 SC Targa (G-Series) Auction Results
| Sold | Price | Mileage | Gearbox |
|---|---|---|---|
| Aug 27, 2026 | $70,500 | 29,000 mi | Manual |
| Aug 15, 2026 | $47,500 | 153,000 mi | — |
| Aug 14, 2026 | $21,750 | 341,000 mi | Manual |
| Jun 27, 2026 | $58,500 | 102,000 mi | Manual |
| Jun 1, 2026 | $39,750 | 220,300 mi | Manual |
| May 22, 2026 | $71,000 | 104,000 mi | Manual |
| Mar 15, 2026 | $68,000 | 161,000 mi | Manual |
| Jan 16, 2026 | $45,000 | 121,000 mi | Manual |
| Dec 17, 2025 | $42,750 | 165,700 mi | Manual |
| Dec 16, 2025 | $53,000 | 143,000 mi | Manual |
| Oct 11, 2025 | $62,500 | 131,000 mi | Manual |
| Sep 1, 2025 | $45,000 | 126,000 mi | Manual |
| Jul 31, 2025 | $32,000 | 6,900 mi | Manual |
| May 1, 2025 | $41,750 | 108,000 mi | — |
| Apr 14, 2025 | $69,000 | 82,000 mi | Manual |
Verified results from the world's leading collector-car auction houses and marketplaces.
All Porsche 911 SC Targa auction results →See the full picture on the 1978 Porsche 911 SC Targa (G-Series)
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Porsche 911 SC Targa by Year
1978 Porsche 911 SC Targa (G-Series): Frequently Asked Questions
How much is a 1978 Porsche 911 SC Targa (G-Series) worth?
A 1978 Porsche 911 SC Targa (G-Series) is worth approximately $49,914 as of Oct 13, 2026, based on 64 verified auction sales tracked by DriveIndex. Based on US sales through Aug 27, 2026. Half of all verified sales fall between $33,000 and $50,000; the full verified range is $11,500 to $93,000. Condition, mileage and options move an individual car within that band.
How much did a 1978 Porsche 911 SC Targa (G-Series) cost new?
The 1978 Porsche 911 SC Targa (G-Series) carried an original MSRP of $23,200. Verified examples now trade around $49,914.
How much has the 1978 Porsche 911 SC Targa (G-Series) depreciated?
It hasn't depreciated. The 1978 Porsche 911 SC Targa (G-Series) is worth about 115% more than its original MSRP of $23,200, with verified examples now trading around $49,914. That compares today's value with the sticker price, not adjusted for inflation.
How many 1978 Porsche 911 SC Targa (G-Series) sell per year?
10 have sold at auction in the past 12 months. DriveIndex has tracked 64 1978 Porsche 911 SC Targa (G-Series) sales in total.
Are 1978 Porsche 911 SC Targa (G-Series) sale prices higher or lower than a year ago?
The median 1978 Porsche 911 SC Targa (G-Series) sale price is up 11.7% 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 1978 Porsche 911 SC Targa (G-Series)?
DriveIndex tracks for-sale listings and auction results for the 1978 Porsche 911 SC Targa (G-Series) from the world's leading collector-car auction houses and marketplaces.
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