Tiffin Allegro Bay Motor Home model -Freightliner Chassis 34 to 38 ft with a front engine. Cummins 5. 9 ISB with Allison 5 sp trans. Not sure where my wife got the info from, she e-mailed me the info. The Tiffin Industries website doesn't have the 2006 new info up yet. Supposedly it won't cost much more than the current gas model that starts at $116,500. Might be something to check out.