FR 9840 then TP 1934 at Lisbon
Cologne → Lisbon → Porto
Timetable, Lisbon time
23:30FR 9840 from Cologne at the gate
18:00TP 1934 to Porto leaves the gate
18 h 30 apart on the timetable, overnight
TP 1934 leaves 18 h 30 after FR 9840 arrives on the timetable: more than half a day, so not a connection we count.