The Fiammetta is the most expensive car in the entire Watch Dogs series, with a price of $700,000.
At the game's release, the price was originally $1,350,000. However, the price was changed in a 2017 update, for unknown reasons.
Voilà ce que j'ai trouvé sur le net. En bref avant la mise à jour elle était à 1 350 000 et maintenant 700 000.