Ben9:
I’ve just done 2 trips to Istanbul and back this month in a van. We tell the customer 4 days from the UK to Kapicule (border).
I go from the train, to Brussels,Liege,Aachen,Koln,Frankfurt,Nurnburg,Passau,Linz,Vienna,Budapest,Szeged,Nadilac,Arad,Deva,Sibiu,Pitesti, Bucharest,Giurgiu,Ruse,Veliko Turnovo,Stalingrad,Kapicule.
You could shave 4 1\2 hours off that route by going Brussels,Liege,Aachen,Koln,Frankfurt,Nurnburg,Passau,Linz,Vienna,Budapest,Szeged,Nadilac,Arad,Deva,Sibiu,Pitesti, Zimnicea, (Ferryboat 5 euros) Svishtov,Veliko Turnovo,Stalingrad,Kapicule.
You could also pop in for a cuppa Lol we are only 14km away from Svishtov
The Ferry Runs on the half hour from Zimnicea and on the hour from Svishtov , turn left out of ferry terminal up the hill and follow road round to right for 1 1\2 mile then follow signs for Veliko it brings you out near to Gorna Oryahovitsa on the Ruse - VT road