automobilist.org
Auto and motor are the two most exhausted roots in this category. Anything built from them competes with a thousand existing names, which is exactly why this one stands out.
Automobilist is what drivers were called when driving was still new. It carries goggles, open roads and mechanical enthusiasm, and it’s still in occasional formal use.
Car culture is deeply nostalgic, and a name from the early motoring era signals that the operation cares about the history rather than just the horsepower. It suits a magazine, a club, a concours or rally organiser, a collector resource, or a museum project.
The .org fits clubs, museums and preservation organisations precisely, and those are the institutions holding classic car culture together.
One word, twelve letters, entirely phonetic, meaning exactly one thing.
The name is listed. Offers welcome.