Meh. RPM is only half of the equation. After all, formula one can go 100K RPM.
However, a 18 wheeler truck engine breezes along under 10,000 RPM (6,000 RPM being the usual, IIRC). As a result, the diesel engine lasts much much longer while formula one engine has to be rebuilt for every race.
I'd rather be driving a cab and scoring some roadkills.
