The 2020 Tiffin Phaeton is a premier Class A diesel motorhome designed for luxury, long-term travel, often built on a robust Freightliner or Tiffin PowerGlide chassis with a 380-horsepower or optional 450-horsepower Cummins diesel engine. This high-end coach features an Allison 3000 MH 6-speed automatic transmission and advanced air ride suspension, ensuring a smooth and powerful driving experience. A fully equipped model typically includes three or four slide-outs, providing expansive living space, along with automatic leveling jacks and a 10.0 kW Onan Quiet Diesel generator for independent power.

Inside, the 2020 Phaeton is designed for maximum comfort and elegance, featuring handcrafted wood cabinetry, polished solid surface countertops, and porcelain tile floors. The galley is fully appointed with stainless steel residential appliances, including a French door refrigerator, a convection microwave, and an optional drawer-type dishwasher. Living areas are equipped with theater seating or Ultra-leather sofas, surround sound systems, multiple TVs, and a "Lift TV" console, while the bedroom offers a memory foam queen or king-sized bed, generous wardrobe storage, and optional stacked washer/dryer units.

Exterior features on a top-tier 2020 Phaeton include an 8-step, full-body paint system with three layers of clear coat and protective scratch-resistant film on the front cap. Further enhancing the exterior are Girard power patio and window awnings, LED lighting, and large basement storage compartments, some featuring pass-through slide-out trays. To facilitate year-round travel, it incorporates three high-efficiency 15k BTU air conditioners with heat pumps and a substantial 100-gallon fresh water tank.