Sisu Model History

Finland · founded 1931

Finland's heavy-truck maker since 1931 — purpose-built for Nordic logging, construction, and military use, now producing the Polar series from Raseborg.

Models

K-Series

Sisu's postwar conventional-cab lorry family — from the K-23 of 1949 through heavy Jyry, medium Kontio, and small Nalle-Sisu sub-brands.

Heavy truck · 1949–1969
KB-24 (Nalle-Sisu)

A compact six-tonne forward-control city lorry — nicknamed 'Teddy Bear Sisu' for its round cab, first Sisu with an all-steel cabin.

Light truck · 1955–1960
M-Series

Forward-control lorries of the 1970s–early 1980s, available in 4×2, 6×2, 6×4, and 8×2 chassis variants.

Heavy truck · 1970–1984
S-Series (Modular)

Sisu's 1980s modular-cabin platform — SK, SM, SL, SR variants sharing common modules across forward-control and conventional cab heights.

Heavy truck · 1980–1995
E-Series

The 1996 modernisation: Renault-derived cabs, Caterpillar and Renault engines, model codes based on engine displacement — Sisu's bridge to the Polar era.

Heavy truck · 1996–2010
E13TP

A heavy 8×8 and 10×10 military terrain truck for NATO-aligned forces — Caterpillar-powered, mine/ballistic protection to STANAG 4569.

Military vehicle · 2005–present
Nasu

A tracked articulated all-terrain carrier for the Finnish Army — two powered units carrying up to 17 personnel across any terrain.

Military vehicle · 1986–present
Polar

Sisu's current heavy-truck series — Mercedes-Benz components, DK12M and DK16M variants, winner of Finland Truck of the Year 2012.

Heavy truck · 2011–present

Other makes