Navistar's new A26 diesel engine, unveiled at TMC in Nashville, is the product of a radically new approach to engine design by the company.

But though thus limited in scope, it treats only of the most modern types and excludes even modern engines and boilers of special types.

Cummins Inc. and Nissan unveiled a technical study called the Nissan Frontier Diesel Runner – Powered by Cummins at the Chicago Auto Show. The heart of this vehicle is a concept 2.8L turbo ...