NOx emissions from diesel vehicles ... the Walmart truck is rolling out in July with the three-cylinder, six-piston, 10.6-liter engine fitted, in a culmination of the late company founders ...

The company also projects that a diesel ... cylinder opposed-piston engine has 60 percent fewer parts than a similarly sized supercharged V6, a reduction that could also lower costs by 10 percent.

Unfortunately, the TS3 was the last opposed piston diesel engine in Commer's lineage. Rootes Group, the company that engineered the engine, worked on a four-cylinder TS4 variant, but the project ...