Tiffin Motorhomes Allegro Bay Motor Home Super C - Diesel

Make room for more comfort, performance, and longer stays in an Allegro Bay Super C diesel coach by Tiffin Motorhomes. The Freightliner custom chassis features a full-time NoSPIN differential single rear axle so you can navigate tougher terrain, and the 12,000 lb. towing capacity means larger cargo can come along!


Each Allegro Bay is dry camp ready thanks to the 150-gallon fresh water tank, and you'll enjoy more power provided by the AGM extended cycle house batteries, or the optional Lithium Ion house batteries. Handcrafted cabinetry will add to the luxury you'll find throughout the Allegro Bay, and the Spyder Multiplex system with app compatibility puts you in control of all your coach's functions. An all-electric option is also available on this coach and features an AquHot ultra compact hydronic heating system and an induction cooktop, removing the need for a propane tank. 


Adventure is just a step away with the Allegro Bay Super C diesel coach by Tiffin Motorhomes. Choose between two luxurious floorplans today!

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Motor Home Super C - Diesel

  1. Bunk Over Cab, Outdoor Entertainment
    • Length: 39 ft 4 in
    • Slides: 3
    • Sleeps: 8

    21 Available Now!

  2. Bunk Over Cab, Bath and a Half
    • Length: 39 ft 4 in
    • Slides: 3
    • Sleeps: 6

    17 Available Now!

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Allegro Bay Features:

Standard Features 



  • Cummins ISB 6.7
  • Horsepower @ RPM: 360 hp @ 2,600 rpm
  • Torque: lb-ft @ RPM: 800 lb-ft @ 1,800 rpm
  • Allison 3000 MH 6-Speed Automatic Transmission
  • Cruise Control
  • Automatic Traction Control
  • LED Headlights
  • Trac-Tech Full Time No-Spin Differential Single Rear
  • Sachs Front Suspension Shock Absorbers
  • Rear Air Suspension with Manual Dump Valve
  • Rear Stabilizer Bar
  • Alternator Amps: 185
  • (2) 12V Chassis Batteries
  • VGT Engine Brakes
  • Full Air Brakes
  • Heated Air Tanks with Auto Drain Valve
  • 275/80R 22.5 Michelin Tires
  • Quick Disconnect Fitting with Tire Inflation Kit
  • Hydraulic Leveling Jacks

Driver's Compartment

  • 7.75" Colored Multi-Function Touch Screen Stereo with Rear Camera
  • View Activated by Reverse and Side Camera View Activated by Turn Signal
  • AM/FM Stereo with Bluetooth, Dual USB Ports, Navigation, Apple Carplay/Android Auto
  • Back-Lit Instrument Cluster
  • Leather Wrapped Steering Wheel
  • Adjustable Tilt and Telescoping Steering Column
  • Adjustable Driver and Passenger Seats
  • Power Windows and Door Locks
  • Power Adjustable and Heated
  • Side-View Mirrors
  • Woodgrain Driver and Center Instrument Panel with Back-Lit Switches
  • Pull-Cord for Air Horn
  • Auxiliary Start
  • Generator Start/Stop
  • Forward Roof-Mounted Console with Upper Storage Compartments
  • Single Electric Windshield Wiper Motor with Delay
  • Marker Light Switch Integrated with Headlight Switch

Plumbing & Electrical 

  • Spyder Multiplex Control System
  • Truma AquaGo Comfort
  • Continuous Hot Water
  • 8KW Onan® Quiet Diesel Generator
  • (2) 15k BTU Air Conditioners
  • 35k BTU LP Furnace
  • 50-Amp Power Cord on Power Cord Reel
  • (4) AGM Extended Cycle House Batteries
  • 2000 W Inverter with Auto- Generator Start
  • Integrated SurgeGuard
  • AquaView ShowerMiser
  • Water Filtration System
  • Water Pump
  • Exterior Sewer Bay with Winterization System
  • Fresh Water Hookup for City Water and Tank Fill
  • Exterior Rinse Hose/Shower
  • Gravity Evacuation Ports for
  • Black and Grey Tanks
  • Black Tank Flush

Plumbing & Electrical Options

  • Lithium House Batteries
  • WiFi Connectivity w/ LTE
  • In-motion Satellite Dish
  • Satellite Prep (Standard)
  • Solar Prep
  • (3) Solar Panels
  • All Electric Coach (AquaHot 250D + Induction Cooktop)


  • Fiberglass Front and Rear Caps
  • One-Piece Fiberglass Roof
  • Full Body Paint with Protective Film in Select Areas
  • 1/4" Thick Single Pane Windows
  • Girard Patio Awning with LED Lighting
  • Girard Slideout Toppers
  • Exterior TV with Sound Bar
  • Keyless Entry for Entry Door
  • Rear Roof Ladder
  • Electric Triple Entrance Step
  • Exterior Undercoating
  • Pass-Through Storage with Automatic Compartment Lights
  • Convenient Side-Swinging Compartment Doors with Gas Shocks and Lockable Door Latches


  • Raised Flat Panel Handcrafted Cabinet Doors
  • Handcrafted Cabinet Fascias
  • Solid Surface Countertops
  • Soft Touch Vinyl Ceiling
  • Centralized Entertainment Center with BluRay® Player for TVs
  • Luxury Vinyl Tile Throughout Coach
  • Treated Carpet and Decor Fabrics
  • Ball Bearing Soft-Close Drawer Slides
  • Solar and Privacy Shades
  • Overhead Bunk
  • Power Roof Vents
  • Smoke Detector
  • Carbon Monoxide Detector
  • LED Lighting
  • LPG Leak Detector

Interior Options

  • Handcrafted Cabinetry: Amber Glazed
  • Handcrafted Cabinetry: Shadow
  • Fabric Suites: Silver Light
  • Fabric Suites: Urban Putty
  • Luxury Vinyl Tile: Sandcastle (Matte Finish) (Standard)
  • Ultraleathers: Belgian
  • Ultraleathers: Cocoon
  • Combo Washer/Dryer (N/A 38 BB)
  • Stacked Washer/Dryer (N/A 38 AB)


  • Residential Refrigerator
  • Double Bowl Kitchen Sink with Single Lever Chrome Faucet
  • Panoramic Galley Window
  • Solid Surface Galley Countertop, Sink Cover, and Cooktop Cover
  • 3-burner Cooktop with Convection Microwave
  • Expand-An-Island
  • Kitchen Options
  • Dishwasher

Living Area/Dinette Options

  • Ultraleather Booth Dinette/Sleeper on Driver Side (N/A 38 BB)
  • Dinette with Computer Workstation on Driver Side (Optional on 38 AB Only)
  • Dining Bar on Driver Side (Optional on 38 AB Only)
  • Ultraleather Booth Dinette with Lift TV on Driver Side (N/A 38 AB)
  • Dinette with Computer Workstation with Lift TV on Driver Side (Optional on 38 BB Only)
  • Dining Bar with Lift TV on Driver Side (Optional on 38 BB Only)
  • Ultraleather DE Sofa Bed on Driver Side (N/A 38 BB)
  • Ultraleather Theater Seating on Driver Side (Optional on 38 AB Only)
  • Ultraleather Theater Seating on Passenger Side (Optional on 38 BB Only)
  • Ultraleather Air Coil Sofa on Passenger Side (N/A 38 AB)
  • Ultraleather Air Coil Sofa with Lift TV on Passenger Side (N/A 38 BB)


  • Wardrobe with Automatic Light
  • Bed Comforter with Throw Pillows
  • Flat Panel TV
  • Memory Foam Queen Mattress (60" x 80")
  • Solar/Privacy Shades
  • Ceiling Fan

Bedroom Options

  • Memory Foam King Mattress
  • Egress Rear Exit


  • Medicine Cabinet
  • Skylight and LED Light in Shower
  • Molded One-piece Fiberglass Shower
  • Solid Surface Vanity Top
  • Roof Vent Fan

See us for a complete list of features and available options!

All standard features and specifications are subject to change.

All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.

Due to Covid19 supply chain issues, some features and options shown may be temporarily substituted or removed. 


Tiffin Motorhomes is proud to be one of the few family-owned manufacturers in the industry, and it makes a significant difference in how our company operates versus our competitors. For starters, with the Tiffin name on every coach, building a superior motorhome isn’t just our occupation. It’s a matter of personal pride, a pursuit we have committed our lives to perfecting.