"We've done it twice already," said Renault's Roman, the Melbourne winner who - in Malaysia - collided with Mark Webber.
Fisichella, 32, urged Italian fans, in local magazine La Gazzetta dello Sport, to support him.
"I don't want to rob Ferrari of fans," he insisted, "it's just that I think Italians should back an Italian."
In Fisichella's home town next Sunday, he - and test driver Franck Montagny - will steer blue-and-yellow R24s around the Circus Maximus stadium.
He smiled: "I hope I'll be doing it as a winner!
"I never dreamed I'd drive an F1 car on the streets of Rome." -GMM