I have to go pretty slow with the top down when my wife is along.

 

[QUOTE]Originally posted by cthree
[B]Driving with the top down makes a HUGE difference! Try this: Drop the top, fill the tank and reset the trip meter. Now drive around using 4 bars of gas. Now do the same with the top up. You will gain at least 5MPG. Why? because you are pushing more air with the top down, rather you are pulling it in the form of drag. On the freeway, hold your hand out the window and guestimate the force pushing on it. Now consider the force acting on the car with the top down. We are talking hundreds of pounds in extra effort to move the car through the air at 60MPH.

 

My top speed top up is 167mph. I could keep going too but i was too scared. Top down, i've hit mid 140's.. it is amazing how much louder the wind is every time u add 40mph to u'r speed. My god, at 140 it felt like my ears were going to be ripped off. I shut down, but it wanted to keep going as well.