2007 Tiffin Motorhomes ALLEGRO BUS 42QRP 2007 ALLEGRO BUS 42QRP CLASS A - DIESEL MOTORHOME BY TIFFIN MOTORHOMES 400HP CUMMINGS ALLISON TRANS THREE A/CS...LOADED Now in its 44th year of production the Allegro continues its legacy as a gateway to the open road. RV - Class A Pusher Diesel 6873 PSN . Affordably priced and packed with Tiffin innovations this coach delivers everything you want in a motorhome at an incredible value...