Hi FlyingFox,
Can I be so bold as to make a few suggestions for your improving your video? I know these are only test shots, but things that I would avoid, and that will make your piece seem tighter, would be to try and avoid the awkward camera movements. So any sort of wavering, hunting for the subject. Edit those bits out
We all shoot dodgy camera moves, but cut those bits out if you can. I say that, because you sort of hint at an edit of sorts, with the shots of the interior, dramatic music and such.
Also your car is the main focus here, but your terrain isn't very interesting viewed from above - it could be anywhere! (well, within reason!). Maybe show a bit of the horizon in this instance, it'll keep your interest, draws the eye forward. Match the speed of the car, and the direction of the car. Perhaps whilst going forward, slowly start to rotate and orbit around it - always a cool looking shot. You need a spotter or someone helping you possibly.
Remember the rule of thirds with composing your shot (difficult whilst trying to fly and shoot at the same time).
When you cut to the inside of the car shots, keep the cuts short and snappy - you're focused on the gear stick, hinting at speed, but the shot is long and lingering, giving the opposite impression! Then again, if your aerial footage is of a car plodding along, high speed cuts to gear changes might not sit well.
Nice footage though - just edit out the waveringness and cut it down a lot