2008 Tiffin Allegro Bus 40QSP 40' Class A Motorhome. Cummins Diesel Engine. 4 Slide Outs with Toppers, Patio Awning with Shade Extension, 1 Door Awning, and 3 Window Awnings, Sleeps 4, Dual A/C Units, Leveling System. Imagine driving off to all of your favorite destinations in this Tiffin Allegro Bus Class A coach. Model 40QSP offers quadruple slide outs for extra interior space, plus so much m...