Porsche's Idea for a Six-Stroke Internal Combustion Engine Looks Brilliant

this design has the potential to generate more power with better efficiency. In a typical engine, only one stroke in four actually makes power. This changes the formula to one stroke in three, and it also burns up the mixture more thoroughly. Of course, the downside is added complexity. Whether the gains are enough to justify the design remains to be seen.

I foresee internal combustion engines staying around for luxury vehicles. Mechanical watches also became luxuries, when they were overtaken by more precise and cheaper quartz watches.