Hmm... Now could the '40's Batmobile have a tracking system similar to Bond's in Goldfinger?
How about tire shredders? Possibly dumping oil slicks and/or spikes out back when being pursued? Then again since when is Batman being pusued?
Then again you never know.
Didn't the '66 car have a chain cutter? Then again with a reinforced "bat" plate on the front end the car could just ram its way through chains and other obstacles...short of actually needing a tank.
How about a gas dispenser for disabling anyone trying to break into the car? I suppose this would require a remote starting/unlocking system for Batman.