Car rentals will carry compact cars with both 2 and 4 doors. While 4 door cars are generally the norm, it is rare that an auto rental company would guarantee such a feature... if you can, make sure to request it as a preference.
Rental companies vary in their make and model offerings for all size categories.
Some Examples of common compact car rentals include
The seating capacity of a compact car is 5 - 2 seat belts in front and 3 in the back.
While a compact car has a seating capacity of 5, if it's affordable, I would recommend a larger size rental car if there will be 5 people travelling in the vehicle for any length of time.
There's often not much price difference between a compact, mid and full size car, and the difference in size of the back seat will be much appreciated by your passengers!
Average Luggage Capacity
The average luggage capacity of a compact car is
1 Large 2 Medium 2 Small -- pieces of luggage.
I find the average luggage capacity listed on most car rental comapany sites is lower ... certainly lower than what I can pack into a vehicle! If you have luggage capacity concerns, I recommend either checking with someone you know who has the same type of vehicle, or visiting a local car dealership to actually view the interior of a compact car, so that you'll know if it will meet your luggage demands.
The common standard features of a compact rental car include:
Power Brakes, Power Steering
Average Fuel Economy
The average gas mileage calculations for a compact category are
26 mpg – city
34 mpg - highway
Note: In general categories, companies can rarely guarantee a make or model. That’s why you’ll usually see a make/model example with a notation of …or similar. That means you will get either that vehicle or something of similar size and with similar features.