Rarity
Finite 1,948-car production, final-991 status and GT-derived manual powertrain create a clearly defined special-series identity
Production verifiedLimited production
Porsche · 2019–2019
911 991 Speedster
Vehicle facts
Built
1,948
Limited production
Powertrain
B6
Technical profile in progress
Output
510 PS / 375 kW
Existing catalog value
Verified market value
CHF 375'077
researched
About this car
SCI Collector Score, the collector case, essentials, market & analysis.
SCI Collector Score
SCI-1.5.069/100
Balanced · Balanced
SCI scale
Tap a color to explore the scale.
7/10
Current · 7/10 · Positive zone
68
Evidence Confidence
100%
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
• Needs at least two independent source providers in the benchmark window.
• Needs at least two comparable sales in the last 24 months.
Rationale
• 3 comparable USD sales underpin the current 72-month benchmark.
• Observed benchmark CAGR is +8.3% across the longest suitable 2–6 year comparison window.
• Recent transaction momentum versus the preceding period is +27%.
• Scarcity uses a conservative production base of approximately 1,948 vehicles.
• Collector Evidence G contributes source-backed structural evidence from 6 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.
Collector intelligence
Why it matters.
The collector case in a few signals first. Full editorial notes and source detail remain available below.
Significance
RM has documented completed auction/private sales.
Heritage
Final special 991 derivative combining Speedster heritage with GT3/911 R-based performance technology.
Technology
Combines a high-revving naturally aspirated GT3-derived flat-six with a six-speed manual and lightweight GT chassis/body technology.
Key checksHigh: serial number within 1,948, original factory options (including Heritage Design), mileage, service…
Technical profile
The essentials.
Engine architecture
B6
Power
510 PS / 375 kW
Cylinders
6
View all specifications
Engine architectureB6
Cylinders6
Power510 PS / 375 kW
Kerb weight1,465 kg
Market
What the market tells us.
A quick read of the strongest published price evidence. Original source currencies stay preserved.
Verified market value
CHF 375'077
researched
Launch MSRP
€269,274 ≈ CHF 247'571
Germany · 2019
Market confidence
68/100
Moderate
Evidence activity
3 sold
1 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 375'077
+8.3% observed CAGRPorsche 911 991 Speedster · model-level research benchmark, not an appraisal of a specific chassis.
Completed sales · 3 · chart-readyAsking market · 1
Raw sales + adaptive trend · historical FX display layer · SCI benchmark gates remain unchanged
3 Sales1 Ask1 GuidesFX normalized
Observed sold-price evidence. Original source currencies remain preserved.
3 trend-eligible sales · launch visually anchored · 3 historical-FX pointsMove 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
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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.
1
Active asks
0
New · 30D
0d
Median duration
3
Verified sales
Price distribution · USD
Asks, guides & verified sales.
5 observations
Guide range is context, not a completed sale.
AsksSalesGuides
SCC $455,771
$328,000$495,000
Value since MSRP
Launch · 2019
€269,274
Current research
$455,771
1 approved guide sources · original currencies preserved
Qualified change
+51.5%
SCI factor profile
Score & evidence.
SCI 69
100.0%
coverage
68
Confidence
3
Comparable sales
Scarcity62 · covered
Collector significance67 · covered
Future relevance80 · covered
Historical performance71 · covered
Demand & momentum88 · covered
Liquidity68 · covered
Price resilience53 · covered
Supply dynamics57 · covered
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
3 qualified completed sales · 0 qualified active asks · 1 source families · FX-normalized to USD
0/4 published
Mileage impact
Mileage & value.
Observed sale value
$389,911
3 qualified completed sales · exact mileage pairing open
Exact mileage evidence
—
No exact sale mileage available yet
Curve status
Research
More comparable sales needed
SourceMileageValueDate
AutoScout24 Switzerlandask1,200 kmCHF 329,8002026-08-27Upper-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
Country-level market source links; availability may change · historical evidence, not live tracking
Historical evidence · not live
Loading evidence map
Listing sources
Switzerland · 1 source
Marketplace links and observed offers. Search result pages are country discovery sources, not a verified count of available cars.
- AutoScout24 Switzerland2026-08-27
listing countryno evidence in layer
Natural Earth basemap.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.
2026-08-05
Bring a Trailer
2019 · United States · Bring a Trailer · Online Auction · AUCTION SOLD · HAMMER
US$ 495'000 ≈ CHF 407'360
2023-05-08
Bring a Trailer
2019 · United States · Bring a Trailer · Online Auction · AUCTION SOLD · HAMMER
US$ 389'911 ≈ CHF 320'877
2021-06-25
Bring a Trailer
2019 · United States · Bring a Trailer · Online Auction · AUCTION SOLD · HAMMER
US$ 328'000 ≈ CHF 269'928
Current asking inventory
Public dealer and marketplace asking evidence as last verified. An asking price is inventory evidence, not a completed transaction.
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
Finite 1,948-car production, final-991 status and GT-derived manual powertrain create a clearly defined special-series identity; RM has documented completed auction/private sales.
Potential value drivers
- • Porsche limited 991-generation 911 Speedster production to 1,948 units.
- • Explicit 1,948-unit limited special series, the number referencing Porsche's founding year.
- • Final special 991 derivative combining Speedster heritage with GT3/911 R-based performance technology.
- • Combines a high-revving naturally aspirated GT3-derived flat-six with a six-speed manual and lightweight GT chassis/body technology.
- • Closed the 991 production era while connecting the 1954 Speedster body concept to Porsche's modern GT programme.
Risk factors
- • High: serial number within 1,948, original factory options (including Heritage Design), mileage, service history and matching accompanying items are explicitly catalogued. · Do not treat Heritage Design and non-Heritage cars as identical comparables without option normalization. Verify series number, original body/specification, mileage and accident/paint history.
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 68/100
Research tier: P2 · Verified production research
Last static verification: 2026-08-31T00:00:00+00:00
Production source
1,948
Porsche limited 991-generation 911 Speedster production to 1,948 units.
Open manufacturer sourceContinue research
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