At 8:46 you see the character Rory driving his Mustang and it is a hard top. Then his car switches to a convertible at 4:51. It's the same car because his location is still in front of the suburban the whole time. Then at 9:12 it is back to a hard top and even at 9:25 Rory is shown driving in his car with what is obviously a hard top. Once again at 10:33 in the scene where he dies, he's going to meet his end in a convertible.