20. Peugeot XU9J4
The Peugeot XU9J4 16-valve inline-4 engine became a force in the world of rally and touring car racing, powering legends like the 405 Mi16 and 205 T16.
Its high-revving character and robust design played a crucial role in Peugeot’s motorsport triumphs.
The XU9J4 remains a celebrated engine among enthusiasts who appreciate French engineering prowess.
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