Looking at renting a "full-size" car from Alamo, it lists it as a Pontiac Grand Prix or similar. What has everyone gotten? We'll have 4 adults and 4 suitcases.
We picked up a midsize, but I noticed a lot of Impalas for the full size. I think there were a couple of Grand Prixs also. I've had an Impala for our road trip vacation this past June and the trunk held a lot of stuff. We even had room to spare, which is rare for us when we take a road trip!
We had an Impala last year. It was great. Plenty of room in the trunk, and lots of leg room for 4 adults. One was even 6'8" tall, and he had plenty of room.