Depends on the girl doesn't it?
I met my other half when we were both racing at santapod drag strip. She turned up in an '85 Porsche 944 and I had a little '79 1.8 MGB GT. Nearly 5 years on we've got a house, business, 4 cars and a fish together.
If you're passionate about cars and you'd love to be with someone who shares that passion then it'll all work out.
If on the other hand you're expecting someone to worship and idolise you because of the car you drive, well, that just makes you out to be a cock-end.
If a girl is attracted to a guy over the car he's got, then you need to expect said girl to be into cars. Also, if you're the sort of insecure guy that would be uncomfortable working on a car with a girl or going racing with a girl I would suggest you look at meeting members of the opposite sex via other means.
Nicola and I work on all our cars together, we go racing and we go to meets together and do it all as equalls. I wouldn't have it any other way.
Here's a photo from the day we met with the cars we had back then....
... and racing against each other at the same event last July.