Twelve years and more than 20 million engines after the Ford Group and PSA Peugeot Citroën began jointly developing and producing two displacement families of diesel engines (1.4-litre to 1.6-litre, and 2.0-litre and above), the two companies announced today that they would stop making the larger powerplants.

Even though most will find it hard to believe, both carmakers said that the decision had nothing to do with the recent tie up between PSA Peugeot Citroën and GM.

“This decision has nothing whatsoever to do with GM,” a Peugeot spokesman told Reuters. “It is not linked to the alliance plan.”

Ford and PSA will each develop its own family of larger diesel engines with a displacement of 2.0-liters and above, but will continue to cooperate on the smaller units.

“This decision has no impact on the current production of the existing jointly-developed engines, or the derivatives planned for Euro 6 emissions legislation which comes into effect from 2014” the two automakers said in a joint statement.

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