Dynamic Content Fields I am new to Drupal. using drupal 7

I would like to have dynamic fields in content type. 
basically i would like to allow users to add a content and in that content, fields should generate dynamically.

for example if user has select  CAR the next field (MODEL) should be generated dynamically according to first one having all the model for that particular car and so on.

i know about "hierarchical select" but its not good for me. conditional fields are still under development.

search a lot but did not come out with any solution. please help.

thanks
Despite your statement in your question, Hierarchical Select is the standard way to approach this sort of need.

There's likely no other stock solution for this, since no one bothered to duplicate HS.