So this is what it's like at the top. The Allegro Bus features the finest of everything, right down to the smallest detail. Distinctive wooden décor. Hand-crafted cabinets. Stainless steel refrigerator. Fine leather sofas. Not to mention the Cummins ISL engine and a 6-speed auto transmission that make the Allegro Bus one of the most powerful diesel pushers on the market. In the end, the Allegro Bus is a truly refined motorhome for those with truly refined taste.