The Italian is not worried about the delays though, as he believes the regulation update dealing with engine changes means the team will catch up to their competitors.
Marchionne said: "We're starting the season a bit late because the design of the new car was started late. But we don't have to freeze the engine by the first race, so it will be a very interesting season.
"I think the car will get better as we go through the year."
He added: "We have a new guy, a team principal, who has been involved in racing a long part of his professional life – Maurizio Arrivabene. And he's busy now.
"We've got a technical guy, (James) Allison, who's taking over the technical side of the business. So we've got the team.
"We had a disaster of a season in 2014, and I think organisations tend to get lazy. So it was time to bring about some change.
"On the road car side, [the business] is doing tremendously well, but at the heart of the success of Ferrari is what it does on the Formula 1 track.
"And if it doesn't get that right, if it doesn't fight properly, then I think it will ultimately impact on brand. So we had to intervene."