Here you can see a bit of everything, the municipal police of my city uses Peugeot 306, a Chevrolet Captiva a Galloper, the local one goes for the same Peugeot 306 Peugeot 307, but La Guardia Civil uses better and bigger cars now, they have Peugeot 406, Citroen C5, Nissan Patrol GR.

Here you can see the cars La Guardia Civil uses: http://perso.wanadoo.es/e/karlmary/guardia_civil.htm