Forgot about the 80's Charger. nasty. Yes, Mustangs have had 2.3L 4's, 200 Straight 6's, 3.8L V-6's and a host of different V-8's. Even from the early get go of the Mustang, they had I6 and V-8's. I don't recall the early Camaros whether they offered anything other than V-8's or not. I do know that the Camaro (and Firebird) was the GM answer to the Mustang. Ford designed the Mustang originally with a host of different options to make it whatever kind of car the buyer wanted.
I guess what I am unsure of is whether or not they will offer the new Camaro with a performance package so it would be what people think of when they think of a Camaro. I'm sure everyone understands what I mean. I would hate to see a castrated version of the Camaro just as we once seen the Charger become.