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Over the years, road cars have gone through many changes and now we are at a time when we have truly mastered the internal combustion engine, but if it wasn’t for the unique, quirky, and cutting edge engines on this list, we wouldn’t have the incredible hypercars and the frugal econoboxes that we love and enjoy today. In this article, we shall look at 9 of the most unique internal combustion engines, that pushed the boundaries of engineering and paved the way for the cars of today.
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