No, but i do drive an old cop car biggrin:
http://www.mazik.net/uploads/Photos052.jpg
http://www.mazik.net/uploads/Photos053.jpg
http://www.mazik.net/uploads/Photos046.jpg
Its not a Crown Vic, but a Chevy Caprice. Came stock with a 5.7 350 LT1 V8,pushing 260Hp, which was incredible back in 1994, and i get asked all the time whether it has the 'cop motor', or the 'police chip' wallbash:
Its the same motor that was available in the Civilan version. Same goes for the Fords. I know that Chevy just put the reinforced frame, external coolers, bigger brakes, and the like. But nothing to increase the power to huge amounts.
They also do stuff to help the handling