Experience elevated diesel luxury and residential comfort on the road with the new 2026 Tiffin Motorhomes Allegro Bay 38 AB—a commanding Super C coach that blends heavy-duty truck performance with high-end motorhome living. Designed for travelers who want serious power, long-range capability, and upscale amenities, the Allegro Bay 38 AB turns every journey into a first-class experience.

At its core, the Allegro Bay 38 AB is engineered on a heavy-duty Freightliner S2RV chassis with a 360HP Cummins diesel engine paired to an Allison transmission, delivering confident torque, smooth shifting, and long-haul reliability . Whether you’re climbing mountain passes, towing toys, or cruising interstate highways, this coach feels stable, strong, and in control.

This is not just an RV—it’s a diesel-powered travel platform built for people who go farther, stay longer, and expect their coach to perform like a professional-grade machine.

Inside, the 38 AB opens into a beautifully designed residential-style interior with multiple slide-outs that dramatically expand your living space. The layout is designed for comfort and connection, featuring a large main living area, flexible seating, and panoramic windows that bring in natural light.

High-end finishes, modern cabinetry, and premium materials elevate the space, giving you a warm, upscale environment whether you’re parked at a resort or boondocking off the grid.

The Allegro Bay 38 AB features a fully equipped kitchen that makes life on the road feel effortless. With a residential refrigerator, convection microwave, cooktop, and generous counter space, you can prepare anything from quick breakfasts to full family dinners.

Smart storage solutions ensure everything has its place, making extended travel more organized and enjoyable.

Toward the rear, the master suite offers a true retreat with a king bed, wardrobe storage, and space designed for restful nights after long days of adventure. The bathroom layout is designed for convenience and privacy, with residential-style fixtures and a spacious shower setup that makes daily living easy on the road.

Optional washer and dryer capability adds even more convenience for long-term or full-time RV living.

The Allegro Bay 38 AB is designed for year-round travel. Advanced climate systems, insulation, and generator capability keep you comfortable in hot summers, cold winters, and everything in between. With large fuel and water capacities, you can extend your trips and reduce dependency on frequent stops .