'95 S6 Avant vs. 05 Stang GT (update)

as many of you know, i was talking about how my buddy in his mustang wanted to race my S6... we did tonight and let me tell you, i think i did the S line proud haha... we did a highway pull, where both of us went down to 50mph and then my other buddy honked his horn 3 times and on the third honk we went for it... we did it about 5 times and all 5 times i had him in the start. (i dropped down into third reving at about 3600 rpm) after we hit about 95 - 100, he took off though. i could feel my car getting "slower" as i shifted up it seemed like the turbo wasnt even kickin' in... would this be due to the year and the miles on it (about 120,00)? just wondering... thought it was a good story cause i did have him from 50 - 100 and then he took over... i thought it was a pretty good race... my other buddy got a kick out of seeing us... haha im done... peace!!!