How do you know if you're driving granny?

Is there a mph factor?

Is it a rpm thing?

Is it just a style?

I think I have the slowest BMW made and I'm slightly bummed about that. (325cic/step)

I didn't buy the car for the torque and hp. I bought it because I like the way it looked and it was a major upgrade over my Toyota Pre Runner. Don't get me wrong, I do like this car very much, but now that I've had it for 4 months I'm thinking I should have gone with a stick or a 330 or both of those. Maybe I spend too much time on this board reading about ZHP's and blah, blah, blah......

Keep the on low please.