Isn't a convertible an open top version of it's fixed roof version of the same car?
Having had three Roadsters at one point Morgan smart and MX5 none of these had a fixed roof version, only the Morgan had removable side screens but they all invoked finding a great road to throw them down!
The smart Roadster has both a softop and removable targa hard roof panels with a fixed roll over bar section so blurs any definition.
Lotus took its softop Elise and created a fixed roof version from it which could be seen as a backwards design of the convertible?
