There’s more room to roam in the 2007 Tiffin Allegro Bay Class A Motorhome. With more space and luxury than ever before, the 2007 Allegro Bay offers its owners a range of standard options that will make any trip pleasurable. Luxurious Class A Motorhome interiors include a cloth recliner and hide-a-bed, stainless steel convection oven, two-burner cooktop, solid wood vanity and 20-inch flat screen TV. The Allegro Bay Motorhome runs on a front engine diesel, which offers long-term dependability and fuel economy, and features an Allison five-speed transmission with overdrive. Tiffin Motorhomes.