Take a closer look at the **2026 Tiffin Phaeton 40 IH**, a luxury Class A diesel motorhome built for travelers who want power, comfort, and residential-style amenities on the road. In this walkthrough, Barry Nellums of La Mesa RecVan explores the Phaeton 40 IH inside and out, including its **Freightliner custom chassis, 8.9L Cummins diesel engine with 450 horsepower and 1,250 lb-ft of torque, Allison 3000 transmission, and 10,000-lb towing capacity**. You’ll also see its spacious four-slide floor plan, massive exterior storage, Girard awnings, Aqua-Hot hydronic heating, and 10,000-watt diesel generator. Inside, the Phaeton delivers a true residential feel with theater seating, multiple smart TVs, a full-size refrigerator, induction cooktop, dishwasher, convection microwave with air fryer, king-size bed, Firefly coach controls, and a spacious rear bathroom with dual vanities. This coach also features a half bath, optional washer and dryer, and plenty of storage for extended trips or f...