4x4s.org BASE MODEL · 1921–26
BASE MODELFrance

Kégresse K1 and P4 T (10 HP B2, 1921–26)

The first production Citroën half-tracks: Adolphe Kégresse’s rubber-tracked rear bogie under the 10 HP Type B2, with its 1,452 cc four of 20 hp and a three-speed gearbox with a reduction gear on the rear axle. The K1 was accepted by the Service des Mines on 11 January 1922 and the P4 T on 17 November 1924; 1,134 half-tracks were built on the 10 HP chassis between 1921 and 1926.

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MODEL LINEKégresse 10 HPBUILT BYCitroënPRODUCED1921–26PRODUCTION1,134LAYOUT2 wheels · 88.6″

The record

Kégresse had run the Tsar’s garage and fitted tracks to its cars before the Revolution; back in France he showed André Citroën three half-tracks on the 10 HP chassis in October 1920. The K1 was sold in short (1.48 m), medium (2.25 m) and long (2.35 m) wheelbases as a tractor, a four- or eight-seat camionnette or a bare chassis, with an all-terrain, a wider snow and a long-distance raid track. Five K1s made the first motor crossing of the Sahara in 1922–23 and eight P4 Ts the Croisière Noire of 1924–25. Year by year, Citroën built 8 in 1921, 118 in 1922, 317 in 1923, 68 in 1924, 619 in 1925 and 4 in 1926.

Specification

MANUFACTURERCitroën ↗
Paris (half-track department at Suresnes, then Courbevoie)
MANUFACTURED1921–26
ENGINECitroën 10 HP four, 1,452 cc, 20 hpCitroën 10 HP four (B2/B12)
PRODUCTION RUN1,134 (1921–26)
COUNTRY OF ORIGINFrance
STATUSout of production; succeeded by the P7 T
RECORD KINDBase model
MODEL LINEKégresse 10 HP
FAMILYKégresse 10 HP
WHEELS2
NOMINAL WHEELBASE88.6″
BODY STYLETorpédo
VARIANTS2

Catalogue fields describe the vehicle's structure and body as this registry records it. They are not certified factory measurements, and no performance figures are published here.

Body styles & colours

Body style

AI rendering impression

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Proportions, fittings, markings, colours and the setting can all drift from the original in the process. For the vehicle's actual details, rely on the specification, the photographs and the cited sources on this page.

Sources

  1. 1Les autochenilles Kégresse (Pascal Honegger, 2015) ↗Krybebåndssocietetet (kegresse.dk) · accessed 2026-09-24SOURCE
  2. 2Citroën Type B2 ↗Wikipedia · accessed 2026-09-24SOURCE
  3. 3Kégresse track ↗Wikipedia · accessed 2026-09-24SOURCE

Registry record updated 2026-09-24 · status: researched