We're going on holiday to the USA during the coming 2 weeks and are wondering if we should rent a car for the drive from DC to NYC or just take Amtrak. We want to do it in a day (on the 9th of September, so a Monday, if that matters).

We are travelling from the Petworth neighborhood in DC to Queens in NYC. Any recommendations for a rental company which would be accessible by public transport on both sides in case car is the best option? We have 2 suitcases and 2 people, so something smallish and sporty would be good (if anyone rents out Miatas or something)