@ tech_wiz & szuberi:
Guys, you are right but that Brabus E V12 is the fastest sedan but do remember that, it´s a tuner car (tuned by Brabus)...! Here, we are taking about production cars...! And Bentley Flying Spur is the king of the ring...!
If you consider tuner cars, than there was a 4 door Nissan Skyline (tuned by Nismo), tested in 1997 & that car did 221mph...! That was the fastest tuner sedan ever...!