And this weekend we reserved an "intermediate SUV" into which we were planning to put five people, one wheelchair and one walker. We got a Jeep Wrangler, which Alamo calls a "full size all terrain vehicle" into which we managed to get two people and one wheelchair. We were not happy campers. Alamo apparently considered this an upgrade.
With Hertz, I've found that reserving an economy car with hand controls generally results in a full size sedan with hand controls.