Renzi stressed that he holds German Chancellor Angela Merkel in high esteem, but also made the case for a bigger role for Italy and other European Union members in jointly tackling European crises.
One point of contention was "Germany's attitude that all EU initiatives start with a bilateral meeting with the French," Renzi told the Frankfurter Allgemeine Zeitung daily.
"Of course I would be delighted if Angela and Francois (Hollande) were able to solve all the problems," he was quoted as saying. "But most of the time this is not what happens.
Renzi, a 41-year-old who has pushed reforms to revitalise a debt-stricken economy, has in recent months repeatedly criticised both Germany and the European Commission on issues ranging from Berlin's perceived dominance to EU budget constraints to energy policy.
More From This Section
Merkel hosts Renzi tomorrow for a working lunch to discuss "the refugee crisis, the international situation and current European issues," the chancellery said.
Renzi called the mass influx an "epochal problem for which there are no easy solutions".
"We are doing our part by rescuing, almost every day, children from capsized boats in the Mediterranean," he said, while calling for an end to EU rules that oblige refugees to apply for asylum in the first EU country they enter, saying "away with it".
Renzi pointed at Italy's economic reforms and a reduced public deficit since he took power in 2014, saying that "Italy is no longer a problem for the EU" and vowing he was "hungry for more reforms".