The classic definition of ‘sports car’ is a low riding, lightweight and nimble vehicle, often a 2 seater or coupe or 2+2. Right!
That then completely discounts any 4 door sedan from being a true sports car.
Thus, a sporty sedan is left open for interpretation, as there is no clear definition, only subjective ones.
Personally, I don’t think it needs to be track-worthy either. To me, If the car is fun to drive fast and hard when called upon, then it obviously is more ‘sporty’ than a car that can’t. And if it has 4 doors, sporty sedan is completely valid. Now, is it a sport sedan, even though there is no clear definition? Again, all relative.
We disagree here. The M3, ATS-V, CTS-V, RS4, Panamenera GTS, etc. etc. are sport sedans. The purpose of them is to be that low riding, nimble formula that people love, while maintaining a shred of practicality by having 4 doors. The Continental is a very different beast, and IMHO, a way more well-rounded and enjoyable ride. But definitely not a sport-sedan.
Unless of course we wanna say CTS-VSports, Continentals/3.0MKZs, 335is, S4s, etc etc are sport-sedans, and the above vehicles are super-sedans, but now I'm just being silly.