Schumacher was the second fastest when he tested out the SF90 on Tuesday – behind only Max Verstappen.
He then drove for Alfa Romeo yesterday where he finished sixth.
However, after sitting in the cockpit and being in the Prancing Horse garage he learned a bit of key information.
According to the 20-year-old, Ferrari may be the first F1 car to have achieve the magical four-figure horsepower.
Speculation has been around for a number of years that F1 teams have developed a car capable of producing 1000hp.
But there has never been any firm confirmation of the figures – until Schumacher let slip.
It means Hamilton’s Mercedes must now crank up their efforts to keep up with their Italian rivals.
“The car accelerates out of the corners so well,” Schumacher told Auto Bild.
“But you still need to have respect.
“If you don’t, with over 1000 horse power it would be dangerous.”
Hamilton is second in the World Drivers’ Championship, behind team-mate Valtteri Bottas.
He will be looking to make up the gap at the Chinese Grand Prix next weekend.
But the Brit has already raised concerns about Ferrari’s straight-line speed so the Asian circuit may again prove difficult.
And if Schumacher is right and Ferrari have achieved over 1000hp then Mercedes could once again be left chasing.
The Silver Arrows struggled for pace in Bahrain last time out but a power failure from Charles Leclerc gifted them a one-two finish.