CarBrandLogos archive · Kenworth · 1961

KenworthW900

Six decades of long-nose conventional, and still the shape owner-operators want.

Photo: PRA · CC BY 2.5

The story

A defining chapter in Kenworth history.

Explore the ideas, engineering and context that shaped the Kenworth W900, then continue into its specifications and place in the marque's lineage.

Interstate Batteries Kenworth T300 truck

Origins

Kenworth introduced the W900 in 1961 as a replacement for its 500- and 900-series conventionals, and the basic proposition has barely changed since. It is a bonneted Class 8 tractor with the engine ahead of the cab, built to be specified almost item by item and to be rebuilt rather than replaced. Buyers choose from a long list of Caterpillar, Cummins and PACCAR diesels running from around 180 to 625 horsepower, with Fuller, Spicer, PACCAR or Allison transmissions behind them.

Interstate Batteries Kenworth T300 truck · MobiusDaXter · CC BY-SA 3.0

Design and engineering

What kept it alive was the owner-operator market. Fleet buyers moved to aerodynamic cab-overs and then to sloped-hood conventionals as fuel economy regulations tightened, but drivers who owned their own trucks wanted the long hood, the chrome, the polished aluminium and the resale value that comes with a machine people actually want. The W900L, with its stretched hood, became the definitive expression of that. Kenworth's own T600 undercut it on fuel burn from 1984 onward, and the W900 simply carried on selling to a different customer.

Kenworth C500 Cement Mixer Truck · Alden Jewell · CC BY 2.0

Kenworth T800 tractor-trailer, Loveland CO

In production

It has also had a long life on screen and in song, most visibly as the black-and-gold rig in Smokey and the Bandit, which fixed the shape in American popular memory. Assembly has run at Renton, Washington and Chillicothe, Ohio. Kenworth introduced the W990 in 2018 as a modern successor and the T900 filled the role in Australia, but the W900 stayed in the catalogue alongside them, one of the longest continuous production runs of any vehicle sold in North America.

Kenworth T800 tractor-trailer, Loveland CO · Greg Goebel from Loveland CO, USA · CC BY-SA 2.0

At a glance

The facts that define it.

Produced

1961–present

Engine

180–625 HP Collapsible list

Body

Truck

Technical specification

The W900, in detail.

Production: 1961–present
Class: Class 8 truck
Body style: Truck (bonneted cab/conventional)
Layout: 4×2; 6×4, 6×2
Engine: 180–625 HP Collapsible list ; framestyle=border:none; padding:0; title=Caterpillar ; 1=3406A,B,C,E ; 2=3408PCTA,DITA ; 4=3316 ; 6=C11 ; 7=C13 ; 8=C15/C16, C-15 Collapsible list ; framestyle=border:none; padding:0; title=
Transmission: Spicer, Fuller/Eaton Fuller, Paccar, Allison 4700 (vocational)
Assembly: United States: Renton, Washington; Chillicothe, Ohio
Manufacturer: Kenworth Truck Company