"I wanted that MSC," the 21-year-old Haas driver told reporters during pre-season testing in Bahrain ahead of his F1 race debut there on March 28.
Mercedes won 13 of the 17 races last season, and have taken both titles for the last seven years, while once-dominant McLaren have not won a race since 2012.
F1 is still considering a Saturday sprint format, according to new head Stefano Domenicali.
The Portofino M convertible grand tourer features a redesigned powertrain, eight-speed gearbox and a five-position Manettino switch that includes a race mode.
Ferrari, the only team to have competed in every season since the first in 1950, have won more races and championships than any other.
The car took German great Michael Schumacher to his record seventh and last world title.
Formula One's 10 teams have committed to the sport until at least the end of 2025.
Ferrari drivers Charles Leclerc and Sebastian Vettel have been seen mixing with people outside their individual team groups.
Australian Daniel Ricciardo will leave Renault and race for McLaren in 2021.
German media, who flagged up the departure on Monday night, reported Vettel had rejected the terms being offered by Ferrari.