How safe in comparison to crash testing ?
The XC90 is the only 4x4 SUV that has ever been put through the roll over test.
(Almost as if the Volvo folk thought - we can do that ...)
Along with side impact protection, a stupid amount of airbags and curtains
So all in all, this is a very safe car.
Have a look at this report:
http://autos.msn.com/research/vip/safety.aspx?year=2008&make=Volvo&model=XC90&trimid=-1
The 2003 Volvo XC90 has 20 valves.
The 2004 Volvo XC90 has 20 valves.
The 2011 Volvo XC90 has 24 valves.
The 2012 Volvo XC90 has 24 valves.
The 2013 Volvo XC90 has 24 valves.
The 2010 Volvo XC90 has 24 valves.
The 2007 Volvo XC90 has 24 valves.
The 2014 Volvo XC90 has 24 valves.
The 2006 Volvo XC90 has 20 valves.
The 2009 Volvo XC90 has 24 valves.
The 2008 Volvo XC90 has 24 valves.
The 2005 Volvo XC90 has 20 valves.