The gas tank on the 2003 Volvo XC90 holds 19 gal..
The gas tank on the 2009 Volvo XC90 holds 21.1 gal..
The gas tank on the 2008 Volvo XC90 holds 21.1 gal..
The gas tank on the 2007 Volvo XC90 holds 21.1 gal..
The gas tank on the 2012 Volvo XC90 holds 21.1 gal..
The gas tank on the 2011 Volvo XC90 holds 21.1 gal..
The gas tank on the 2005 Volvo XC90 holds 18.0 gal..
The gas tank on the 2010 Volvo XC90 holds 21.1 gal..
The gas tank on the 2013 Volvo XC90 holds 21.1 gal..
The gas tank on the 2006 Volvo XC90 holds 21.1 gal..
Well, honey, a Volvo XC90 typically holds around 18.8 gallons of gas. Just enough to get you where you need to go without stopping too often. Unless you drive like a maniac, then all bets are off.
The gas tank on the 2014 Volvo S80 holds 18.5 gal..