Which Cars Have Auto Start-Stop? By Make, Model and Year / Porsche / 911Porsche 911 Auto start-stop by year YearAuto start-stop2026Some configurations2025Yes2024Some configurations2023Some configurations2022Some configurations2021Yes2020Yes2019Yes2018Yes2017Yes2016Some configurations2015No2014No2013Some configurations Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).