It depends on the model, I believe. I know that an LX has 4 cylinders.
All Honda Civic models from 1973 to the present day are 4 cylinder.
The 2004 Honda Civic has 115 horsepower at 6100 rpm. The engine boasts 4 inline cylinders with a single overhead cam.
All Honda 4 cylinders from 2003 and up have a timing chain except the 2004 & 2005 Honda Civic which has a belt. 2006 and up Civic has a chain.
The 2008 Honda Civic has 16 valves.
The 2014 Honda Civic has 16 valves.
The 2003 Honda Civic has 16 valves.
The 2010 Honda Civic has 16 valves.
The 2011 Honda Civic has 16 valves.
The 2005 Honda Civic has 16 valves.
The 2009 Honda Civic has 16 valves.
The 2013 Honda Civic has 16 valves.
The 2004 Honda Civic has 16 valves.
The 2001 Honda Civic has 16 valves.