It took just seven days to sell both the sports coupe and the sports 5 things we learned from October auto sales 3. The 2015 Mustang shares the fastest-selling title with something a bit more sedate with a much more subtle redesign the 2015 Honda CR-V. It took just seven days to sell both the sports coupe and the sports Check out this story on USATODAY.com: http://usat.ly/1qomcPf Taillights were all most folks saw of the 2015 Mustang as it tied Honda's new CR-V for fastest-selling vehicle in October.