Before they disappeared from Ford's range, my favourite long distance tourers in the USA were the Ford Crown Victoria/Mercury Marquis and the Lincoln Town Car. Need to get from Washington DC to Bloomington, Indiana or San Franciso to LA or Pheonix to Monument Valley or Boston to Mechanicsburg, Pennsylvania in a day? These were the no fuss cars that did it. Acres of interior space, huge boots, V8 power, silent, soft seats, compliant suspension, power everything.