depends on the specific models. one of the later model f bodies could top 160, the Vic's usually top out at 140, the 2010 taurus SHO is governed to 133. but as others said, you can't outrun the radio, plus the cops are professionally trained in high speed driving.
p.s. I remember police on L.I. NY or L.A. using a Lamborghini. out run that!