Yes.
Car kits that store the names/numbers and does the dialing work differently than a Headset/HandsFree device.
Example: My Dad's new 2010 GMC Terrain. Its built in bluetooth can dial two ways...
1. take the time to enter and store names/numbers in the car's on board "computer", hit the button and say "call...." the car then dials the number on the cell phone. (you're limited to 50 names/numbers, you must enter them individually and you can't PUSH your contacts via BT from your cell to the car, nor can you "sync" them). This method should work for the Droid.
Or...
2. Hit the button, say "Bluetooth" wait for it to prompt Bluetooth Ready... say "voice" wait for it to kick off the phone's built in voice dialing allowing you to use the phone's complete contact list. This is the same way as using a BT headset.
Dad has over 80 numbers in his phone, and while he calls really only about 4 or 5 people.. it was a pain to enter those numbers into the car, so I showed him how to use option #2 and he's happy. Note: he uses a G'zOne Boulder? in Orange as his phone.