I don't see how quoting random articles proves either or, specially when it comes to specific jargon in a sport or even the original topic here wrt. engine vs. motor.
> This article gives an outline of Formula One engines, also called Formula One power units since the hybrid era starting in 2014. Since its inception in 1947, Formula One has used a variety of engine regulations. Formulae limiting engine capacity had been used in Grand Prix racing on a regular basis since after World War I. The engine formulae are divided according to era.
Quoting random articles should prove the point that the author of that page on the F1 website did not in fact make a typo, as you suggested. The word powerplant is used — fairly commonly, both written and spoken — in motoring journalism in place of the word engine or motor.
I don't find your arguments convincing, for the logical holes I've spotted. I don't think you find my arguments convincing either, so I guess we'll leave it at that.
> This article gives an outline of Formula One engines, also called Formula One power units since the hybrid era starting in 2014. Since its inception in 1947, Formula One has used a variety of engine regulations. Formulae limiting engine capacity had been used in Grand Prix racing on a regular basis since after World War I. The engine formulae are divided according to era.
https://en.wikipedia.org/wiki/Formula_One_engines
You are also not really addressing the original point you where making that "powerplant" is a "direct translation" of the word "silnik".