[masraum]

I suspect there are many, many factors that impact the level of wind in the car, the rake of the windshield, how far in front of your head the top of the windshield is, the sideview mirrors, how far your head is from the side of the windshield, how flush the windshield is to the A-pillars, how high the beltline of the car is, the configuration of the area behind the driver's seat (how far back the back seatbacks are, how deep the rear seating is, the rear seat headrests, etc...), how aerodynamic the car is overall, etc....

In my old miata, I could drive in a fair amount of rain, and as long as I put the side windows up, I kept fairly dry. I believe most vehicles that are open top (cab, targa, T-top) get most of their "wind" from the sides vs the top. I once had my old targa up to 145 with the top off. I put the side windows up. It wasn't that windy in the car (but it was incredibly loud).