Be yourself - which includes NOT hiding your car.
So it's a PORSCHE....BIG DEAL!
See how that works?
Ask her questions about HER and HER life......and be a good listener during conversation.
Women are attracted to guys who are confident, smart, with a good sense of humor. Clean with good hygiene. Well-mannered but also not afraid to relax and be themself.
What you drive doesn't amount to a hill of beans - as long as you and her are comfortable. Meaning - don't drive like a freaking maniac! You can do that when she's not around!
You drive a 911 because you're a PASSIONATE person - without passion you're nobody. Soak it all in and have fun. If it happens it happens. If it doesn't it doesn't. Sun gonna still come up tomorrow and you're still gonna be the luckiest guy in the world...regardless of what anyone else does.....