Again, by your definition neither is the 426. Hemi is a trademark owned by Chrysler and now Fiat that is a marketing term. They own the term and whatever they want to call a Hemi is a Hemi. If Fiat wants to get into the packaged meat business and create a triangular shaped hotdog and call it a Hemi guess what? It's a Hemi. If by Hemi you mean a motor with hemispherical shaped combustion chambers then I don't think any motor has, the more accurate description would be domed shaped chambers.
