To give you some examples:
* Early 1900s: Many early cars were produced by small manufacturers, and sales figures weren't consistently tracked as they are today. Ford's Model T, while hugely influential later, didn't dominate until the teens.
* 1910s-1920s: The Ford Model T became incredibly popular, largely due to its affordability and mass production.
* 1930s-1950s: Chevrolet and Ford battled for top sales in the US, with models like the Chevrolet Master and Ford V8 being popular.
* 1960s-1970s: Again, Ford and Chevrolet competed strongly, with specific models experiencing periods of peak popularity (e.g., Ford Mustang).
* 1980s-1990s: Japanese manufacturers like Honda and Toyota gained significant market share in the US and globally. Specific models, like the Honda Civic and Toyota Corolla, became exceptionally popular due to reliability and fuel efficiency.
To answer your question accurately, we'd need to specify a decade or country. There's no single "most popular" for the entire century.
