{"id":46634,"date":"2026-02-18T08:51:00","date_gmt":"2026-02-18T07:51:00","guid":{"rendered":"https:\/\/www.italpassion.fr\/?p=46634"},"modified":"2026-02-18T08:51:00","modified_gmt":"2026-02-18T07:51:00","slug":"stellantis-could-replace-all-peugeot-engines-with-fiat-engines-the-puretech-too-fragile","status":"publish","type":"post","link":"https:\/\/www.italpassion.fr\/en\/stellantis\/stellantis-pourrait-remplacer-tous-les-moteurs-peugeot-par-des-moteurs-fiat-le-puretech-trop-fragile\/","title":{"rendered":"Stellantis could replace all Peugeot engines with Fiat: Puretech too fragile?"},"content":{"rendered":"
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For several weeks now, the Stellantis<\/a> seems to be evolving at high speed. The return of diesel<\/a>, extension of the Italian FireFly engine<\/a>With each announcement, the same signal appears: the Group is gradually abandoning the idea of a single engine for the whole of Europe. Behind the scenes, however, discussions are going much further than the official communication suggests. According to several industry reports, Stellantis is now considering a major industrial changeover: gradually replacing PSA-sourced engines, including the famous 1.2 PureTech, with Italian engines from Fiat. And this time, it's no longer just a rumor.<\/p>\n\n\n\n

Behind Euro 7, a budget battle<\/h2>\n\n\n\n

Officially, the arrival of the Euro 7 standard means that internal combustion engines will have to be modernized across the board. Unofficially, it forces manufacturers to choose what to invest in, and what not to invest in.<\/p>\n\n\n\n

Adapting an entire engine family to this standard costs millions of euros. However, according to several sources inside the sector, Stellantis has made a clear choice: to concentrate its budgets on Italian engines rather than pursue the in-depth development of the PureTech and BlueHDi engines.<\/p>\n\n\n\n

It's not just a question of industrial image or internal politics. It's first and foremost a technical and financial trade-off. The Group believes that modernizing French engines would be very costly for an uncertain result in the long term, particularly in terms of reliability and durability under Euro 7 constraints.<\/p>\n\n\n\n

PureTech's problem isn't just a belt<\/h2>\n\n\n\n

For years, the 1.2 PureTech has had a difficult reputation surrounding its belt. But according to technical information from the industry, the problem goes deeper than that. Internally, the engine is said to be mechanically more fragile, with faster wear of certain key components and a higher risk of breakage over long distances. The Euro 7 upgrade could even accentuate these stresses, by increasing internal temperatures and pressures.<\/p>\n\n\n\n

Conversely, the Fiat FireFly (GSE) engine is said to be more structurally robust. Its more recent design and larger components would offer a better margin of durability, making it a sounder basis for the next thermal decade. In other words, the debate would no longer be purely industrial, but purely mechanical.<\/p>\n\n\n\n

The changeover has already begun<\/h2>\n\n\n\n

Internal reports even suggest that the timetable has already been set. The 1.6 JTD engine (present in the Alfa Romeo Tonale) is said to be in preparation for equipping a large part of the European range: Peugeot 208, 308, 2008, 3008, 4008, 5008, but also Opel Corsa, Astra, Mokka or Grandland, not forgetting numerous Citro\u00ebn models.<\/p>\n\n\n\n

Other displacements would follow, notably the 2.0 and 2.2 adapted to future standards. Ironically, the 2.2-liter is said to be a former PSA-FCA collaboration... but would now return under the Italian banner. If confirmed, this would mean a historic reversal: for years, Italian brands have adopted French engines within the group. The balance could now be reversed.<\/p>\n\n\n\n

A strategy consistent with recent decisions<\/h2>\n\n\n\n

Taken separately, each event might seem isolated: the rescue of the FireFly, the return to diesel, the investment in Termoli, the new eDCT boxes... Taken together, they tell a different story: Stellantis is preparing a new common thermal base for Europe, but different from the one planned when the group was created.<\/p>\n\n\n\n

The initial plan was based on PSA engines as the backbone, with the 1.2L EB2 and 1.6L EP6. The current plan could be based on Fiat engines. The logic becomes clear: rather than developing two complete Euro 7-compatible families, the Group chooses the one deemed the most technically sustainable.<\/p>\n\n\n\n

This choice would also have important symbolic significance. At the time of the PSA-FCA merger, many believed that French technology would become dominant. For several years, this was indeed the case.<\/p>\n\n\n\n

But the slower-than-expected energy transition is changing priorities: robustness and longevity are once again essential to amortize development costs. Stellantis could finally rely on its Italian mechanical heritage to get through the last decade of thermal power in Europe.<\/p>\n\n\n\n

Nothing has yet been officially confirmed. But the industrial direction now seems coherent:<\/p>\n\n\n\n