[Obioban]

There's more than that, imo:
linear powerband with instant throttle response
engaging, natural engine sound
feelsome steering
feelsome chassis
responsive steering
rear wheel drive driving dynamics
close to neutral when driven at the limit
light weight
good visibility and sense of where the car is on the road
ability to not be annoyed by computer assistance while going for an engaging drive
reasonably small, but still practical
... I'd put a manual trans on that list, too, for my wants.

And a sport sedan shouldn't have:
screens instead of gauges
fake exhaust sound through the stereo
fake burbles/pops on overrun
turbos
automatic trans
awd
run flat tires

BMW has given up on most of those at this point. Some still have rear wheel drive driving dynamics and/or responsive steering :P