When I was single
I had this exact dilemma.
I met her at the resturant and we had a fun time and I offered to drive her home.
Earlier that day I had to decide on what sort of guy I am; a nice sensible guy in a Corolla or a wanker in a Porsche.
We walked a couple of blocks and she saw the 911 and said "Wow I love those cars." Not knowing it was my car. I said "You discreetly look up and down the street and if I can get it started I'll drive you home in it."
She thought this was REALLY funny when after about 5 minutes she figured out it it was actually my car.