(Adds details, background)
By Giulio Piovaccari and Laurence Frost
MILAN/PARIS, May 25 (Reuters) - Fiat Chrysler and Renault are in talks on a comprehensive global tie-up that could address some of the main weaknesses of both carmakers, two sources with knowledge of the discussions told Reuters on Saturday.
The talks are at an advanced stage, the sources said. The Financial Times https://on.ft.com/2HRDghE earlier reported that FCA and Renault were discussing a deal to forge "extensive ties" to tackle structural challenges facing the global auto industry.
A spokesman for FCA declined to comment on the report. Renault spokesman Frederic Texier said the French carmaker had no comment.
Pressure for consolidation among carmakers has grown with the challenges posed by electrification, tightening emissions regulations and investment-thirsty technologies for connected and autonomous vehicles.
FCA and Renault have a combined market capitalization approaching 33 billion euros ($37 billion) and total global sales of 8.7 million vehicles. Besides bringing greater scale, a tie-up could help patch flaws on both sides.
FCA has a highly profitable North American RAM trucks business and Jeep brand but has been losing money in Europe, where it may also struggle to keep pace with looming carbon dioxide emissions curbs.
Renault, by contrast, is an electric-car pioneer with relatively fuel-efficient engine technologies and a strong presence in emerging markets, but no U.S. business.
Any tie-up would likely face political and workforce hurdles, particularly in Italy. Most of FCA's European plants are running below 50 percent capacity.
It was unclear whether the FCA-Renault deal talks would conclude successfully, the sources said.
The plan under consideration could involve some transfer of equity, one source said. "This isn't just another partnership - it's more than that."
Both carmakers have also been exploring tie-ups with other partners.
While FCA has recently revived discussions with PSA Group - which have been recurrent over the years - Renault is seeking a merger with Nissan, its partner in a troubled 20-year-old alliance.
A tie-up between FCA and Renault would not preclude a consolidation of the alliance with Nissan, one of the sources said.
The Renault-Nissan partnership, underpinned by crossed shareholdings, has been strained by the scandal surrounding former chairman Carlos Ghosn, who was ousted in the wake of a Nissan internal investigation.
A tie-up that included Nissan would vault the ensemble to the rank of global No.1 carmaker with 13.8 million annual sales. It would also maintain a foothold in China, where both FCA and Renault are marginal players.
($1 = 0.8927 euros) (Additional reporting by Joe White in Detroit, Kanishka Singh in Bengaluru and Inti Landauro in Paris; Editing by Andrew Heavens and Daniel Wallis)