If I had a dollar for everytime this was suggested I would be very rich. Unfortunately, it is unlikely to happen for various reasons
1) Majority of medics cannot drive (Sorry if your the minority that can)
2) Some Medics like to run people over to essentially exploit and make more money.
3) 75% of all VDM reports usually happen in a hatchback sport, fast acceleration shit braking.
The medium between the SUV and Hummingbird is just right so long as you can fly. If you want to go a bit faster to reach your casualty grab a couple of nitrous injectors.