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Authorship
The car
Power320 bhp
Engine6.9L supercharged DOHC straight-eight
Builtapprox 36
The supercharged SJ, fastest and most flamboyant American car of the Classic era.
Finding one
Typical
£2,500,000
for a good example
Range
£1,200,000 to £8,000,000
genuine supercharged SJ versus J, original coachwork and provenance, celebrity ownership history
For sale now
rarely more than one or two genuine SJ cars offered worldwide
public listings
rarea small number of public sales per decade for genuine SJs · Last notable sale: Duesenberg J and SJ cars regularly make 1000000 to over 4000000 GBP at Gooding, RM and Bonhams sales, top cars far higher
Market figures are indicative, drawn from public auction and listing data; they guide, they do not appraise.
Parts and support
supported by a tiny expert circle, Randy Ema is the recognised authority, all work bespoke
SpecialistsRandy Ema Duesenberg specialistFran Roxas restorationsAuburn Cord Duesenberg specialist network
In the network
Concoursio is a living public record. It references formal provenance (chassis, registries, sale history); it does not certify it. This is a seed record and its details are being verified.