22. Lancia Aurelia
Entering the car market in 1950, the Aurelia was revolutionary, and not only for its design and performance. The Aurelia had a narrow-angle V6 engine, and it was the first mass-produced V6 engine in the world. Produced as sedan, coupe or convertible, the Aurelia was an exclusive and expensive machine.
And better yet, it had an engine displacement ranging from 1.8-liters to 2.5-liters. The compact and light V6 unit was powerful and propelled Aurelia to respectable top speeds. The later series were even successful racing cars. When Lancia presented the Aurelia, the other car companies decided the V6 engine was worth consideration. So, it is safe to say the Aurelia started the trend.