Depends if it is just a base P71 or a S.A.P. (Street appearence Package) P71. A SAP will have a chrome grill, body color mirrors, b pillars, a Crown Victoria emblem on the trunk, body colored rear fascia, and full wheel covers, chrome door handles and lock plungers.

A base P71 will have the black honeycomb grill (after99), black B pillars, a Police Interceptor badge 9after99) steel wheels with center caps, black door handles and lock plungers (after 01)

The antennas are dependant on what the specific department installs. Fords involvement with the antennas ends with the pre-laid wiring, if it is a chosen option.

Internally the only differences between a P71 and a civilian version is a heavier duty suspension, upgraded wiring harnesses, bigger alternator (200 amp starting in 2004), few available options, dual stainless exhaust worth about 10hp, stainless fuel lines, and a different computer. The only differences in the computer is a slightly higher idle 800rpm vs. 600rpm to help with alternator charging, and possibly a slightly different tranny program (i dont think anysone has found out for sure weather or not the tranny programs are different or not) Also P71's have aluminum driveshafts anbd are available with either a 3.27 or a 3.55 rear gear, civilians normally come with a 2.73-3.27 depending on package and year.

*EDIT*

in 2006 Balistic door panels became available.
in 2007 17" steel wheels became standard on P71s