After the original symthic forum shutdown I gathered up what I knew/had about bf4 vehicle stats in a document:
Google doc with Bf4 Vehicle stats
Contributions of any kind are very welcome!
Currently contains info on:
-Mobility hits
-Vehicle Upgrades
-Countermeasures
-Angle modifiers
-Motion sensor ranges
-Repair tool
-Below radar
-Missile ranges
-Weapon stats and info