Retirement and selling a car

Hello:

I will be retiring in December and my wife works a few days a month. We will
only need a single car after my retirement. We have  two cars, both paid for.
The cars are a 2013 Infiniti G37 and the other is a 2014 Dodge Charger R/T
with a Hemi. Both are is good condition and have been maintained
religiously. I have a pre-paid maintenance plan on the Charger until 2024.
The Infiniti has one with a year left. Is it better to keep one of the cars or
trade them both in on a new vehicle (2020 Honda Civic Hatchback) and try to
pay for the new car with the current value of both? We hope to make a
decision in December.
Thank you. My email address is wbaethge2@gmail.com.
Warren Baethge