For Sale: Class A - Diesel / Concord, Nc Why Purchase From Us - Click Here! This Is A Preowned 2002 Tiffin Allegro Bus 40qrp Class A Diesel That Features 2 Slides With Toppers, Awning, Leather Interior, Dinette, Microwave, Refer, Stovetop, Sofa, Loveseat, Tv, Washer/dryer Combo, Walk Thru Bath With Large Shower And A Queen Bedroom.