If you badly want a Challenger convertible, you may need to go all the way back to 1970 or find a Challenger with this model year. 1970 is a special year because this was the first time that a Challenger convertible was ever released. Overall, there were reportedly around 1,070 people who ordered the Challenger R/T convertible.
However, according to Mecum Auctions, only nine of them opted to get a 425-horsepower Hemi engine. Today, we consider the 1970 Challenger R/T Hemi convertible to be a rare muscle car no one knows about because there are just very few of them.