Motorsport
Extremely scarce, race-proven Porsche with seven-figure auction results
Production verifiedVery rare
Porsche · 1964–1965
904 Carrera GTS
Vehicle facts
Built
106
Very rare
Powertrain
B4
Technical profile in progress
Output
180 PS / 132 kW
Existing catalog value
Indicative value
CHF 1.61M
1 approved market guide sources · indicative only
About this car
SCI Collector Score, the collector case, essentials, market & analysis.
SCI Collector Score
SCI-1.5.083/100
Strong · Strong
SCI scale
Tap a color to explore the scale.
8/10
Current · 8/10 · Strong zone
63
Evidence Confidence
80%
Coverage
Indicative SCIRisk —
SCI 1.5
Collector score.
75%
Collector core
25%
Market
Factor breakdown
Open any factor to see what it means and which evidence supports it.
How SCI works
Collector quality and evidence are separate. Structural collector factors carry 75%; observable market factors carry 25%.
Methodology & score historyResearch notes
Publication gates
• No coherent sold-price benchmark is available.
• Needs at least 3 comparable sold observations inside the 120-month market window.
• Needs at least two independent source providers in the benchmark window.
• Needs at least two comparable sales in the last 24 months.
• Data Confidence must reach at least 68/100.
Rationale
• Scarcity uses a conservative production base of approximately 106 vehicles.
• Listing-supply coverage is not yet sufficient, so Supply Dynamics remains unscored and Data Confidence is capped.
• Collector Evidence G contributes source-backed structural evidence from 3 independent sources; it does not substitute for transaction evidence.
• SCI 1.5 separates structural collectibility from evidence confidence: scarcity, collector significance and future relevance carry 75% of SCI; observable market factors carry 25%. Thin public-market evidence primarily reduces Confidence rather than intrinsic collector quality.
• Uncovered factors retain conservative neutral priors in the score model while their missing support remains visible in factor coverage and Evidence Confidence; they are never presented as equally evidenced facts.
• SCI is indicative: the collector score clears the coverage gate, while Verified publication still requires the independent market-evidence gates.
Collector intelligence
Why it matters.
The collector case in a few signals first. Full editorial notes and source detail remain available below.
Heritage
RM documented a 904 Carrera GTS sale at €1.428 million and emphasized documented ownership/competition history.
Rarity
Porsche states 106 four-cylinder 904 Carrera GTS units were produced
Collector signal
additional works cars used six- and eight-cylinder engines and sit outside that 106-car four-cylinder series count.
Key checksExtremely high: period competition record, continuous ownership, original chassis/body/engine configuration…
Technical profile
The essentials.
Engine architecture
B4
Power
180 PS / 132 kW
Cylinders
4
View all specifications
Engine architectureB4
Cylinders4
Power180 PS / 132 kW
Kerb weight655 kg
Market
What the market tells us.
A quick read of the strongest published price evidence. Original source currencies stay preserved.
Indicative value
CHF 1.61M
1 approved market guide sources · indicative only
Launch MSRP
DEM 29'700
Germany / historical launch reference · 1964
Market confidence
63/100
Moderate
Evidence activity
1 sold
0 asking · 1 source
Market chart & benchmark
Price history, evidence modes, ranges and benchmark methodology · open by default
OpenClose
Market chart & benchmark
Price history, evidence modes, ranges and benchmark methodology · open by default
Collectible market terminal
CHF 1'612'782 – CHF 1'612'782
Porsche 904 Carrera GTS · model-level research benchmark, not an appraisal of a specific chassis.
Completed sales · 1 · chart-readyAsking market · 0
Raw sales + adaptive trend · historical FX display layer · SCI benchmark gates remain unchanged
1 Sales0 Ask1 GuidesFX normalized
Observed sold-price evidence. Original source currencies remain preserved.
1 trend-eligible sale · 1 historical-FX pointMove across a sale point to inspect the observation
SaleAskMedian trendLaunch MSRP
Raw sales remain individual evidence points. The filled line is an adaptive median market story visually anchored to launch MSRP on MAX; launch is not included in the median, SCI score or benchmark eligibility.
SCI Research Tools
Analyze this car.
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Vehicle gallery
See more of this car.
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List this car.
Turn the SCC record into a research-backed listing for the next collector.
Market intelligence
At a glance.
How to read this
Only qualified SCC evidence is shown. Missing evidence stays blank.
0
Active asks
0
New · 30D
—
Median duration
1
Verified sales
Price distribution · USD
Asks, guides & verified sales.
2 observations
Guide range is context, not a completed sale.
AsksGuides
Sales
$1.96M$2.21M
Value since MSRP
Launch · 1964
DEM 29,700
Current research
$1.96M
1 approved guide sources · original currencies preserved
Qualified change
Not comparable
SCI factor profile
Score & evidence.
SCI 83
80.0%
coverage
63
Confidence
1
Comparable sales
Scarcity91 · covered
Collector significance100 · covered
Future relevance89 · covered
Historical performance50 · pending
Demand & momentum49 · pending
Liquidity52 · covered
Price resilience50 · pending
Supply dynamics50 · pending
Methodology details
SCI and evidence confidence remain separate measures. Missing evidence is never presented as equal precision.
Market signals
Market Radar.
Evidence currently in scope
1 qualified completed sales · 0 qualified active asks · 1 source families · FX-normalized to USD
0/4 published
Mileage impact
Mileage & value.
Observed sale value
$2.21M
1 qualified completed sale · exact mileage pairing open
Exact mileage evidence
—
No exact sale mileage available yet
Curve status
Research
More comparable sales needed
No exact mileage-tagged sale or active ask is available yet. Any observed value above remains context only; no mileage adjustment is inferred.
Upper-bound mileage stays qualified; asking values do not enter the sale-based curve.
Global Registry
Publicly observed.
Source-backed historical observations, deduplicated into known identities where evidence is strong enough. This is provenance research, not live tracking.
0
Publicly observed
0
Public observations
—
Latest evidence
0.0%
Research coverage
Research coverage
0.0%
observed
Public source geography
One map · filter registry, sightings and listings
No privacy-safe public country cell yet.
Low-sample countries remain hidden until the public threshold is met.
Transaction tape
Recent observed sales.
Research depth
Sources & methodology.
Professional research stays complete, but it no longer competes with the first-read vehicle story.
Price evidence ledger
MSRP, sold, asking and guide evidence with original currencies
Price evidence ledger
MSRP, sold, asking and guide evidence with original currencies
Price evidence
Evidence ledger.
Launch MSRP, realized sales, public asking inventory, valuation guides and reported one-off commission estimates stay separate. Auction venue, mileage, model year and specification context are exposed where sources publish them. Source currencies are preserved and estimates are never relabelled as MSRP, transactions or current market value.
Manufacturer / launch MSRP
Original published launch pricing. Net/gross basis is preserved where the source states it.
Completed sales
Published realized transactions only. Auction, venue, mileage and specification context remain visible; unsold bids never enter this group.
2025-03-07
Gooding & Company
1964 · Gooding & Company · Amelia Island Auction 2025 · AUCTION SOLD · PUBLISHED SOLD RESULT
1964 Porsche 904 Carrera GTS
US$ 2'205'000 ≈ CHF 1'814'605
Date n/a
RM Sotheby’sSpecial case
1964 · France · RM Sotheby’s · Paris 2015 · AUCTION SOLD · FINAL PRICE UNCLEAR · sale_date_not_recovered
€1,428,000 ≈ CHF 1'312'903
Date n/a
RM Sotheby’sSpecial case
1964 · France · RM Sotheby’s · Paris 2014 · AUCTION SOLD · FINAL PRICE UNCLEAR · sale_date_not_recovered
€1,288,000 ≈ CHF 1'184'187
Date n/a
RM Sotheby’sSpecial case
1965 · United States · RM Sotheby’s · Arizona 2015 · AUCTION SOLD · FINAL PRICE UNCLEAR · sale_date_not_recovered
US$ 1'650'000 ≈ CHF 1'357'868
Market guides
Supporting valuation evidence; lower-weighted than direct completed sales and kept separate from live asks.
Collector research notes
Full narrative, value drivers and risk factors
Collector research notes
Full narrative, value drivers and risk factors
Extremely scarce, race-proven Porsche with seven-figure auction results; RM documented a 904 Carrera GTS sale at €1.428 million and emphasized documented ownership/competition history.
Potential value drivers
- • Porsche states 106 four-cylinder 904 Carrera GTS units were produced
- • additional works cars used six- and eight-cylinder engines and sit outside that 106-car four-cylinder series count.
- • Very small competition/customer series created around GT racing requirements
- • the 106 figure specifically describes the four-cylinder production series.
- • A central Porsche 1960s competition/super-sports icon and an important predecessor in the marque's later halo-car lineage.
- • First Porsche GRP body combined with a lightweight steel-box chassis and extremely low frontal area
- • works development also tested six- and eight-cylinder engines.
- • Won the Targa Florio shortly after launch and became one of Porsche's defining dual-purpose GT/racing designs of the 1960s.
Risk factors
- • Extremely high: period competition record, continuous ownership, original chassis/body/engine configuration and works/customer status are central to collector comparability. · Mixing 106 four-cylinder series cars with works six/eight-cylinder cars, reconstructed bodies, replacement engines or undocumented race histories can create major identity/value errors.
Research status & production source
Verification, research tier, methodology and factory source
Research status & production source
Verification, research tier, methodology and factory source
Research status
Static profile
Editorial review in progress
Production facts
Source verified
SCI methodology
Research · confidence 63/100
Research tier: P0 · Verified production research
Last static verification: 2026-08-31T00:00:00+00:00
Production source
106
Porsche states 106 four-cylinder 904 units were built; this catalog row is the B4 Carrera GTS and therefore uses 106 as row-specific production.
Open manufacturer sourceContinue research
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