Well the v6 mustang is a muscle car because mustangs where classified muscle cars in the 60-70's. Considering the camaro with a v6 is classified as a muscle car then the mustang is too. Dodge charger/challenger with the v6 is classified as a muscle car. Doesn't mean they have to have huge amount of power it is just a classification they give them. Insurance companies classified my mustang as a family car cause it has the v6. Go figure.....