if you look on the front of the timimg belt cover it should tell what engine is in the car. also there is a decal on the left strut tower or inner fender with the engine specs on it. i would guess that you have a B230F unless it is the twin cam 16 valve engine.
If you go to the Volvo web site you will find a VIN number decoder:
http://www.volvocars.com/us/top/yourvolvo/volvo-vehicle-information-library/pages/default.aspx
nope
Volvo buses will have Volvo Penta engines in them.
Depends on the engine and ECU you have in it
The 2012 Volvo XC90 has an inline 6 engine.
The 2012 Volvo XC70 has an inline 6 engine.
The 2008 Volvo S80 has an inline 6 engine.
The 2009 Volvo XC70 has an inline 6 engine.
The 2003 Volvo XC90 has an inline 5 engine.
The 2004 Volvo S80 has an inline 5 engine.
The 2009 Volvo C70 has an inline 5 engine.
The 2015 Volvo XC60 has an inline 4 engine.
The 2013 Volvo XC70 has an inline 6 engine.