In a small bowl, whisk together the mustard, orange juice, honey, orange rind, cinnamon and allspice. Set aside.
Place the pork on a rack in a shallow roasting pan. Insert a meat thermometer into the center of the pork. Roast for 30 minutes, or until the thermometer registers 160 degrees. During the last 10 minutes of roasting, brush the pork occasionally with the mustard mixture.
Remove from the oven and let stand for 5 minutes before slicing and serving.