It looks like Simonini is developing a new motor. It appears it is a four cylinder four stroke. I posted this here since Simonini is more known for their two strokes. The article is in German but you can use Google to translate.
http://www.google.com/url?sa=t&source=web&cd=8&ved=0CFkQ8ggwBw&url=http%3A%2F%2Ftranslate.google.com%2Ftranslate%3Fhl%3Den%26langpair%3Dde%257Cen%26u%3Dhttp%3A%2F%2Faeronauticmedia.de%2Fdownload%2F20s-simonini-4zyl-0608-complete-small-3.pdf&rct=j&q=simonini%20Victor%202%20for%20sale&ei=l_l8TZvsFI_6swPv6_yIAw&usg=AFQjCNG0koMiOd3ZFEvlNTIz1qhpXugoNA&sig2=UZAx3MkyJCRhaKTHAsjCYg&cad=rja
Hope this link works.
Hetzer
Here is the link to the untranslated pdf with pictures.
aeronauticmedia.de/download/20s-simonini-4zyl-0608-complete-small-3.pdf
http://www.google.com/url?sa=t&source=web&cd=8&ved=0CFkQ8ggwBw&url=http%3A%2F%2Ftranslate.google.com%2Ftranslate%3Fhl%3Den%26langpair%3Dde%257Cen%26u%3Dhttp%3A%2F%2Faeronauticmedia.de%2Fdownload%2F20s-simonini-4zyl-0608-complete-small-3.pdf&rct=j&q=simonini%20Victor%202%20for%20sale&ei=l_l8TZvsFI_6swPv6_yIAw&usg=AFQjCNG0koMiOd3ZFEvlNTIz1qhpXugoNA&sig2=UZAx3MkyJCRhaKTHAsjCYg&cad=rja
Hope this link works.
Hetzer
Here is the link to the untranslated pdf with pictures.
aeronauticmedia.de/download/20s-simonini-4zyl-0608-complete-small-3.pdf