Several outlets have published lists of the greatest concept cars, with some focusing on specific time periods, such as the 21st century or the past 10 years. The number of concept cars included in these lists varies, ranging from 11 to 25, and some lists highlight specific brands or design features, like mid-engined or wedge-shaped cars. The criteria for selection and the specific concept cars included differ across the lists, resulting in a range of vehicles being showcased as among the greatest.