I have a Rav4 that easily carries three bikes, (though my spouse's Trek Navigator is awkwardly big and doesn't stand up nice like my bikes) but I question whether it would carry four. It is the two wheel drive version and gets better than 30mpg. I looked at getting the Honda minivan. The gas mileage was pretty good for a minivan and it would be such a nice vehicle for transporting bicycles. I kind of regret not getting the minivan as the bike stable has increased in size.
Trek Madone 4.7 WSD
Cannondale Quick4
1969 Schwinn Collegiate, original owner
Terry Classic
Richard Feynman: “The first principle is that you must not fool yourself and you are the easiest person to fool.”