PSA Peugeot Citroën
The genesis of the Tiara was the result of an agreement during the mid 1990s, between Proton's then CEO, Yahaya Ahmad, and PSA Peugeot Citroën, a producer of Citroën and Peugeot vehicles. Yahaya had expressed wishes that Proton did not use Mitsubishi platforms, and that Proton cooperated with PSA Peugeot Citroën for access to its diesel engines.