Originally Posted by mac.mogul
You can look at examples from Fusion/Edge/Escape/Explorer as well and the option list is the same. All the base models have an optional EcoBoost engine that makes performs roughly the same as the non-turbo counterpart while returning better fuel economy.
I see no reason why Ford would not apply this formula to the Mustang as well.
Because it's a Mustang (and not a family car), the same set of rules may not apply.
A high performance turbo 4 in a lightweight, rear wheel drive car may attract a number of enthusiasts that otherwise may not be interested in a "pony car".