It stands to reason that an enthusiast who is passionate about a marque would be at least a little interested in machinery peripherally related to said marque. I am referring to vehicles which don’t immediately come to mind when thinking or talking about a brand. A vehicular outlier, let’s say.
For example, a BMW car enthusiast could be interested in BMW motorcycles, but that would be too obvious. Our enthusiast would be excited about BMW-powered boats. The Ferrari geek in our group would get excited not about the latest Pebble Beach results, but rather a Lancia Thema 8.32, a generic sedan stuffed full of glorious Ferrari V8.