Makes › Jaguar United Kingdom › XKSS · Factory competition · 1957 Ultra Rare

Jaguar
XKSS

Road conversion of unsold D-types; 9 of 25 planned cars lost in the Browns Lane fire of February 1957.

Still being researched: full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.

Jaguar XKSS (Wikimedia Commons search)
Jaguar XKSS (Wikimedia Commons search)
Photo: MrWalkr · CC BY-SA 4.0
16BuiltIndependently researched
0Chassis documentedin this archive
?SurvivingNot yet verified
Contents
  1. 01Overview
  2. 02Production & history
  3. 03Specifications
  4. 04Colours & options
  5. 05Individual cars
  6. 06Reference

01Overview

At a glance

Built
16 Built
Years
1957
Engine
XK inline six · 3,400 cc / 3.4 LFactory: 3.4 L
Power
186 kW / 253 PSFactory: 250 hp · converted
Top speed
Not yet verified
Body
Not yet verified
Designer
Malcolm Sayer
In this archive
Not yet verified
Surviving
Not yet verified

Sources and any conflicting figures are in the sections below.

Why it matters

The XKSS turned unsold Le Mans-winning D-types into road cars and is often described as one of the first true supercars. A factory fire in February 1957 destroyed nine of the cars, leaving only 16 originals, which makes it one of Jaguar's rarest road models.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Model rarityUltra Rare 16 · Built1,2
Specification rarityNot yet assessed
Colour rarityNot yet assessed
Individual rarityNot yet assessed
Historical rarityNot yet assessed
Survival rarityNot yet assessed

Each kind of rarity is rated separately and never combined.

Photos

Exterior, interior and detail photos with their licences.

02Production & history

Production

Every figure says what it counts.

What is countedFigureBasisStatus
Total model productionXKSS chassis saved from the fire (9 lost) 161,2 Factory production Independently researched

Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.

History

With 25 D-types still unsold in late 1956, Jaguar converted them into road-legal sports cars and named the result XKSS. In February 1957 a fire at the Browns Lane factory reached the dispatch area where the cars were kept; staff saved sixteen chassis and nine were lost. Around sixty years later Jaguar built continuation cars using the nine lost chassis numbers.

Variants

How each version differs from the standard XKSS.

No variants documented yet. Have a source? Contribute it.

03Specifications

Technical specifications

Engine

Engine familyNot yet verified
Engine codeNot yet verified
LayoutXK inline six3 Registry reported
Displacement 3,400 cc / 3.4 LFactory: 3.4 L3 Registry reported
BoreNot yet verified
StrokeNot yet verified
Compression ratioNot yet verified
Fuel systemNot yet verified
Power 186 kW / 253 PSFactory: 250 hp · converted3 Registry reported
Power atNot yet verified
TorqueNot yet verified

Transmission & drivetrain

GearboxFour-speed manual3 Registry reported
Gears43 Registry reported
Driven wheelsNot yet verified

Chassis, body & dimensions

ChassisNot yet verified
Front suspensionNot yet verified
Rear suspensionNot yet verified
BrakesNot yet verified
SteeringNot yet verified
Body constructionNot yet verified
WheelbaseNot yet verified
LengthNot yet verified
WidthNot yet verified
HeightNot yet verified
Front trackNot yet verified
Rear trackNot yet verified
Kerb weightNot yet verified
Dry weightNot yet verified

Performance

Maximum speedNot yet verified
0–100 km/hNot yet verified
Fuel tankNot yet verified

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

04Colours & options

Factory colours & interiors

Original paint and trim, with the number of cars in each where a source gives it.

Not yet documented. Have a source? Contribute it.

Factory options & codes

Codes are shown exactly as written by the manufacturer.

Not yet documented. Have a source? Contribute it.

05Individual cars

Chassis register

Every documented car, with its colours, history and where it is now. Open a row for the full record. Known chassis are not automatically authenticated originals.

Not yet documented. Have a source? Contribute it.

Competition history

Every race result of the individual cars, in date order. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

Auction & sale history

Documented public sales of the individual cars. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

See one in person

Museums where an example of this car can be seen.

No example is documented on public display yet. Have a source? Contribute it.

06Reference

Identification guide

How to tell an original from a replica or later conversion.

The XKSS differs from the D-type by a full-width chrome-framed windscreen, an added passenger-side door, chromed front and rear bumpers and a simple folding fabric roof. Original cars carry an XKSS chassis stamp, and on at least one documented car the earlier XKD number was ground off the front shock-absorber mount when it was converted. Only the 16 cars saved from the 1957 fire are originals; later Jaguar continuation cars use the nine lost chassis numbers.

Sources

Each number links to the exact facts it supports.

  1. 1
    1957 Jaguar XKSS Level B Ultimatecarpage.com
    • Numbers built: 16
    Accessed 2026-11-12
  2. 2
    Flameproof: The Origin of the XKSS | RM Sotheby's Level B
    • 16 XKSS chassis saved from the fire (9 lost)
    Accessed 2026-11-11
  3. 3
    Jaguar XKSS Level B Jaguar Enthusiasts Club
    • 3.4 L XK6 I6
    • 250 hp
    • 4-speed manual
    Accessed 2026-11-11