Sometimes, the most unforgettable cars aren’t those with the flashiest badges or the highest price tags. Throughout automotive history, certain models have emerged from obscurity—often dismissed or underestimated at first— only to outperform their rivals and capture the hearts of enthusiasts worldwide. These underdogs defied expectations, challenging the established giants and rewriting what was possible for their era. This article celebrates 15 classic cars that rose from humble beginnings or initial skepticism to become icons, showing that greatness can come from the most unexpected places.