In the 2 years I owned my TT roadster, I NEVER used the top cover. Should not have any effect except maybe that your top may accumulate dust/leaves that settle in that area when the top is down.
What's a "top cover"? The "hood" (as we say over here - the cloth bit that keeps the rain off, as opposed to the "bonnet").
Only driven top-down to 148mph - top tip is to turn the radio up before you hit around 135mph, as it gets a bit noisy and, at that speed, you should be paying attention to things other than the ICE!.
You also lose the bass, Bose notwithstanding. Top-up driving limited to about 75mph (if it's too wet to have the top down, then it's too wet to play dodge-the-idiot ;o)
If I tried that in the UK, I'd probably get shot ;o)
I gather from your other post that it's the plastic tonneau that you were also asking about? It's just there to take up most of your boot [trunk] space and make the car look pretty..
It /will/ fit in the cabin behind the seats, but - IIRC - interferes with the cupholders and blocks access to the storage bins.
The hood stays where it's put, even at high speed, and the glass deflector also makes a very noticable difference (implicit assumption: that you have the electric hood package, mandatory over here in the UK. No experience of the manual hood)
Last point - don't forget that there is a *lot* of space at the very back of the boot [trunk] for things that aren't very tall. Just watch that you don't end up polishing the rear of the car with your trousers when you're loading/unloading.. ;o)
Thanks again. Yes, that little space at the rear of the "bootrunk" (New English) is handy. I have a warning lamp in its box, and two large map guides of the Los Angeles area jammed in there. They don't move, are quiet, and don't slide around the rest of the vast (!) space wrecking themselves -- when I hasten around a corner, for instance.
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.