WDR, you are assuming the Sebring has the 3.5 and not the 2.7 which is a big difference. The 2.7 V6 has almost 50HP less than the 3.5V6.
Also, what are you racing to...60,70,80 etc.
Too many variables. If the Sebring is the 3.5 V6, I'd say that would win. If its the 2.7V6 the Saab will win.