I've been away from X-Wing for a while now and have a number of models from the old box set and some of the expansions, I just picked up the Force Awakens box starter set which has the updated rules. Are the new ship maneuvers for X-wings and Tie fighters in the Force Awakens box available for old X-Wings and Tie fighters ?

No. TIE f/o Fighters and T70 X-Wings (and indeed, every type of ship in the game) use different dials and pilots, and the dials and pilots go with specific ships. You can't use a T70 X-Wing dial with an original X-Wing, and vice versa, and ditto for TIE Fighters/TIE f/o Fighters.

Thanks for the quick response !