Capacity won the long race
The Speed Six turned Bentley's 6½ Litre into the works car that won Le Mans in 1929 and 1930. Road cars ranged from formal saloons to open tourers. Original coachwork and numbered-component history matter more than team-car resemblance.
Market value · road
$1.5M–$3.5M
Typical $2.2M · 6 sales · +171% vs ’19–’22
Market value · road
$1.5M–$3.5M
Typical $2.2M · 6 sales · +171% vs ’19–’22
Market & Price
A terminal for one car: the model curve over the documented record, the benchmarks it is measured against, and the instruments that read it.
Records: 15 documented road sales on file · 2003–2025; estimate band $1.5M–$3.5M · good road cars. recorded sale prices · mixed hammer and premium-inclusive basis.
Compound annual growth
| Window | This car* | S&P 500 | Gold |
|---|---|---|---|
| 1Y | +0.3% | +18.8% | +21.9% |
| 5Y | +28.5% | +11.4% | +17.6% |
| 10Y | +17.4% | +13.3% | +11.8% |
*Modeled price CAGR · S&P is a price index, no dividends
Deepest drawdown · model window
Forecast ladder · model quantiles
| Horizon | P10 | P50 | P90 |
|---|---|---|---|
| +6M | $1.8M | $2.2M | $2.7M |
| +12M | $1.7M | $2.3M | $3.0M |
| +24M | $1.6M | $2.3M | $3.4M |
Median path with the 10th and 90th percentile · not investment advice
15 of 15 recorded sales · shown in USD · recorded currency in each record
Recent road-car sales sit near $2'100'000; the 2013 original Grafton coupé reached $2'860'000.
Floor
$1.5M
Typical
$2.2M
Ceiling
$3.5M
Estimate band for good road cars. 6 documented sales since 2019 plotted below.
Band and axis shown in USD. Sale positions use indicative fixed-rate conversion to USD; sale readouts retain recorded currencies. USD; original Speed Six road chassis with documented coachwork. Works racers sit outside the band.
Instrument calibration for this file is in progress — the terminal above reads the documented record directly.
Published sold totals are recorded without currency conversion. Coachwork, engine identity and period use must be read with every observation.
Overview
Bentley introduced the Speed Six in 1928 as the sporting derivative of its 6½ Litre. W.O. Bentley increased breathing, compression and camshaft performance rather than adding forced induction.
The works team won Le Mans with the model in 1929 and 1930. In 1929 the winning car covered 2'844 km and Bentley occupied the first four places; the 1930 victory completed the Cricklewood company's run of five wins in eight editions.
Bentley built 182 Speed Six chassis in three road wheelbases. The bodies were commissioned separately, and many cars were later rebodied or converted toward Le Mans specification, so a convincing-looking open tourer is not evidence of a team-car identity.
Reference
The records
0
Speed Six chassis
0
Le Mans wins
0bhp
race output
HICON BID
A HICON Bid is a confidential expression of buying interest on the Bentley Speed Six file — never public, never shown to other members. It is not a binding purchase, and HICONIUM holds no funds.
HICON Bids are a member instrument. Sign in to place one.
The vault
You keep one? The record starts in your garage — identity, papers, photography, and the market evidence this file already carries, bound to your chassis.
The variants
The register separates the Speed Six into its documented executions. One reference silhouette per execution — each opens as its own file as the archive fills.
Standard012 executions on file · references drawn to the house standard
The cars
Documented individual cars — chassis, colour, ownership and sale history. Open one for its full provenance. Public records only; members see the complete registry.
01 documented · public records
The hands
The people whose work shaped the Bentley Speed Six.
Founder and chief engineer
Developed the Speed Six from the 6½ Litre around increased capacity, breathing and durability rather than supercharging.
Chairman and works driver
Shared the winning Speed Six in 1929 and 1930 and gave the model its Blue Train association.
