It’s stretching the boundaries to call it a convertible, as I always associate the term to mean cars with a folding canvas roof.
It may look like one, but my TVR is strictly speaking a targa, as it has two hard roof panels that lift off and are stored in the boot.
As cars go, it’s even more impractical than a true convertible, as you can’t really go anywhere with luggage when you have the roof down. However, it makes a glorious racket when you put the foot down – it may only be a three-litre V6 but it sounds like a V8. Sometimes when I’m driving it I think I’m going to need surgery to wipe the smile off my face!