Money Goodbye, V6 : The reasons why six-cylinder engines are on their way out in most new cars June 24, 2021June 24, 2021Nathan Bomey, USA TODAYComments Off on Goodbye, V6 : The reasons why six-cylinder engines are on their way out in most new cars Six-cylinder engines in passenger cars are disappearing. Except for luxury brands, mainstream cars increasingly don't offer once-mainstay V6 engines.