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 Cummins B6.7 360 HP diesel engine will power your trips both near and far!


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 puts you in control of all your coach's functions. New features include a lower entry step added, Generation 3 paint schemes, washer and dryer prep on all models, new matte finish tile flooring option, and optional Starlink prep that gives you the option to work remotely if needed!


Adventure is just a step away with the Allegro Bay Super C diesel coach by Tiffin Motorhomes. Choose a luxurious floorplan 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

    18 Available Now!

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

    16 Available Now!

  3. Bunk Over Cab, Bath and a Half
    • Length: 39 ft 4 in
    • Slides: 3
    • Sleeps: 8

    5 Available Now!

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Allegro Bay Features:

Standard Features (2024)


Chassis and Drivetrain 

  • Freightliner® S2RV Chassis
  • Cummins® B6.7 360 HP Diesel Engine with 800 lb-ft Torque 
  • Two-wheel Drive
  • 185-Amp Alternator
  • Allison® 3000 MH 6-speed Automatic Transmission with Lock-up Torque Converter
  • Front and Rear 275/80R 22.5 Tires
  • (2) 12-Volt Flooded Lead Acid Chassis Batteries
  • Hydraulic Leveling Jacks with Control Panel
  • Taper Leaf Front Suspension
  • Freightliner® Airliner® Rear Suspension with Manual Dump Valve
  • Rear Sway Bar
  • Custom Tuned Sachs® Shock Absorbers
  • Eaton Tractech NoSPIN® Differential
  • Front Radiator
  • Full Air Brake System with Automatic Slack Adjusters
  • Heated Air Tanks with Auto Drain Valve
  • Single Stage Variable Geometry Turbocharger (VGT) Engine Brake
  • Manual Parking Brake
  • Rear Fuel Fill
  • Automatic Traction Control
  • Cruise Control
  • Tire Inflation Kit with Quick Disconnect Fitting

Wheel Options

  • Aluminum Wheels (Standard)
  • Black Aluminum Wheels (Optional)


  • Seamless One-piece Gel-coat Fiberglass Molded Roof Cap
  • 5 1/4" Formed Roof Insulation
  • Tubular Aluminum Roof Skelton Frames
  • Extraordinaire Ducted Air Cooling System
  • One-piece Molded Gel-coat Fiberglass Front and Rear Caps
  • Crane Composites Noble Select All-Composite Exterior Sidewalls
  • Tubular Aluminum Wall Skeleton Frames
  • High-performance Thermal Insulation in Sidewalls
  • Steel Floor Skeleton
  • Engineered Wood Sub-flooring
  • 1 1/2" Thick Thermal Insulation in Floor
  • Steel Basement Construction
  • Rust Protective Undercoating
  • Hydraulic Slide Out Mechanisms 


  • Spyder Controls Multiplex System
  • Firefly Integrations Mira Module
  • Centralized 7.5" Spyder System Main Monitor
  • Interior Entryway Spyder System Color Touchscreen
  • Additional Spyder Color Touchscreens Throughout Coach
  • 8.0-Kilowatt Onan® Quiet Diesel Generator
  • 2,000-Watt Pure Sine Wave Inverter with Auto-Gen Start Remote Control
  • (2) 15,000-BTU Air Conditioners with Heat Pumps
  • 50-Amp Shore Power with Powered Retract Reel
  • Auxiliary Solar Port
  • HD Over-the-air Antenna
  • Park Cable and Ground Satellite Hook-up
  • Prep for In-motion satellite
  • Blu-ray™ Player
  • Satellite Receiver
  • 12-Volt Breaker Panel
  • 12-Volt Disconnect Switch
  • Rotary Disconnect Switches for House Batteries, Chassis Batteries, and Inverter
  • Ground Fault Circuit Interrupter (GFCI) Outlets at Galley, Lavatories, and Sewer Bay
  • 110-Volt Exterior Receptacle
  • Surge Guard® Transfer Switch
  • USB Receptacles Throughout Coach

Heating and Cooktop Power Source

  • Liquid Propane (LP) Coach 
  • Hydronic Heating & Electronic Appliance Equipped Coach (Optional)

House Batteries

  • (4) 6-Volt, 210-Amp Hours Extended Cycle AGM House Batteries
  • (2) 12-Volt, 270-Amp Hours Lithium House Batteries (Optional)

Space Heating

  • (1) 35,000-BTU Ducted Furnace (DEP)
  • Aqua-Hot® 250D Heat Exchanger (DEP)

Solar Panels

  • Prep for Solar Panels (Optional)
  • (3) 200-Watt Solar Panels with (1) 30-Amp Controller (Optional)

Electrical Add On Options

  • In-Motion Satellite Dish 
  • Wi-Fi Booster
  • Starlink Prep in Sewer Bay (Optional)


  • Aqua View Showermiser™
  • Water Filter
  • Water Pump Switch Access from Spyder System and Sewer Bay Board
  • Low-point Water Drain Lines
  • Black Holding Tank Flush System
  • Gravity Water Fill
  • Tank Level Monitor System
  • Exterior Sewer Bay with Winterization System and Gravity Black and Grey Evacuation Ports
  • Exterior Rinse Hose with Shower Head
  • Fresh Water Hookup for City Water and Tank Fill

Water Heater

  • Truma AquaGo™ Comfort Instant Water Heater (DEP)
  • Aqua-Hot® 250D Heat Exchanger (DEP)
  • Water Heater Bypass System 

Water Tank Heating

  • Heated Fresh and Holding Tank Compartment via Heat Duct (N/A 38 AB)
  • Heated Fresh and Holding Tanks via Tank Pads (38 AB Only)


  • Full-body Paint with (3) Layers of Clear Coat
  • Single-colored slide out endwalls
  • High Performance Protective Film on Front Cap and Select Areas
  • (1) Girard® Side-mounted Powered Patio Awning with Integrated LED Lighting
  • Girard® Slide-out Toppers
  • Side-swinging Exterior Storage Doors with Gas Shocks
  • Lockable Handles on Compartment Doors
  • Motion-sensor Lights in Cargo Bay
  • GatorHyde-Lined Cargo Walls and Floor
  • Frameless Style Tinted Windows
  • Exterior Patio Light
  • Driver and Passenger Side Front Cap Exterior Entry Light
  • Daytime Running Lights
  • Heated Power Side-view Mirrors
  • Exterior TV with Soundbar
  • Fast Charge USB ports within Exterior TV Compartment
  • Lightweight Entry Door with Integrated Screen
  • Entry Door Grab Handle
  • Deadbolt Front Entrance Lock
  • Automatic Double Entry Step
  • Front Door Entry System via Key Fob 15
  • Mud Flaps
  • Lippert On-The-Go Telescoping Ladder

Exterior Color Package Options

  • Midnight Blue Full Body Paint
  • Fire Opal G3 Full Body Paint
  • Bordeaux G3 Full Body Paint
  • Crimson Mist G3 Full Body Paint
  • Frosted Granite G3 Full Body Paint
  • Polar Frost G3 Full Body Paint
  • White Mahogany G3 Full Body Paint


  • Handcrafted Overhead Cabinetry with Honeycomb-patterned glass
  • Carpeted Step Well with Composite Steps
  • Living Area TV
  • Solid Surface Galley Countertop
  • Handcrafted Slide-out Fascia
  • Soft Touch Vinyl Ceiling
  • Dimmable LED Lighting
  • Prep for Washer and Dryer
  • Carbon Monoxide Detector
  • LPG Leak Detector
  • Fire Extinguisher
  • Solar and Privacy Shades
  • Soft-closing Drawer Slides
  • Powered Roof Vents
  • Interior Grab Handle at Entry door
  • Egress Windows Throughout Coach

Interior Decor Packages

  • Stoney Creek (Optional)
  • Solstice (Optional)

Upholstery Fabrics

  • Ultrafabrics Montage Landscape (DEP)
  • Ultrafabrics Montage Alpaca (DEP)

Cabinetry Color

  • Sandstone (Optional)
  • White Linen (Optional)
  • Platinum (Optional)

Floor Tiles

  • Marble Obsess Glazed Porcelain Tile  (Optional)
  • Marble Obsess Matte Porcelain Tile (Optional)

Interior Add On Options

  • Central Vacuum System (Optional)
  • Stacked Washer and Dryer (Optional)

Driver's Compartment

  • Ultrafabrics® Montage Pneumatic Suspension Driver and Passenger Seats
  • Dual Driver And Passenger Seat Armrests
  • Mounted Seatbelt Brackets
  • Dual Chamber Lumbar Support on Driver and Passenger Seats
  • Adjustable Damper on Driver and Passenger Seats
  • Tilt, Fore and Aft, Backrest, and Height Adjustment on Driver and Passenger Seats
  • Leather Wrapped, Tilt and Telescoping Steering Wheel
  • Ergonomic Dash with Woodgrain Driver Accents
  • Dual Center Cupholders
  • Roof Mounted Storage Compartments
  • Backlit Instrument Cluster
  • Generator Start & Stop Rocker Switch
  • USB Dash Receptacles
  • 12-Volt Dash Receptacle
  • Dash Rocker Switches
  • Driver and Passenger Map Lights
  • One-piece, Tinted, Roped-In Windshield
  • Single-motor Intermittent Windshield Wipers
  • Automatic LED Headlights
  • Trailer Marker Light Switch Integrated with Headlight Switch
  • Side-view Cameras
  • Color Back-up Camera
  • 10" Detachable Touchscreen featuring Media Center, AM, FM, and Satellite Radio, Bluetooth®, and Camera Monitoring
  • Dash and B-Pillar Mounted Speakers
  • In-dash Navigation System via 10" Detachable Touchscreen
  • Front Overhead Bunk with Privacy Curtains
  • Cab Skylight
  • Auxiliary Start Switch
  • Dual Electric Horns
  • Air Horn with Pull-cord
  • Powered Windows
  • Driver and Passenger Sun Visors
  • Powered Door Locks
  • Integrated Door Storage Pockets
  • Stepwell Light Mounted Inside Doors
  • Privacy Curtain

Driver's Compartment Add-On Options

  • Overhead Bunk TV (Optional) 
  • Floor Mats (Optional)

Dinette and Living Area

Drivers Side Dinette

  • 75" Booth Dinette-Sleeper
  • 75" Dinette Bar (Optional)
  • 75" Dinette with Chairs (Optional)

Driver Side Furniture

  • 74" DE Sofa Bed (38 AB Only)
  • 74" Theater Seating (Optional; 38 AB Only)
  • Driver Side Bunk Beds (28" x 70" (38 CB Only)

Passenger Side Furniture

  • 68" Air Coil Sofa Bed (38 AB Only)
  • 74" Air Coil Sofa Bed with Furniture-mounted swivel table (N/A 38 AB)
  • 74" Theater Seating (Optional; N/A 38 AB)


  • 20-Cubic Foot Stainless Steel Residential Refrigerator with Top Freezer
  • 1.7-Cubic Foot Smart Convection Microwave with Air Fry
  • Double Bowl Kitchen Sink with Single Lever Faucet and Pull-down Sprayer
  • Galley Overhead Cabinets
  • Panoramic Galley Window
  • Task Lighting
  • Full Tile Backsplash
  • Solid Surface Galley Countertop, Sink, and Cooktop Cover

Cooking Appliances

  • Three-Burner Liquid Propane Cooktop (DEP)
  • Two-Burner Induction Cooktop (DEP)
  • Drawer-style Dishwasher (Optional)

Extendable Countertops

  • Manual Release Expand-An-Island (38 AB Only)
  • Flip and Fold Countertop Extension (N/A 38 AB)


  • Bedside Windows
  • Bed Comforter with Throw Pillows
  • Handcrafted Privacy Door
  • LED Reading Lights
  • Nightstand with Solid Surface Tops
  • Mounted Bedroom TV
  • Centralized Entertainment Center 
  • Ceiling Fan
  • Mattress
    • Memory Foam King Mattress (72" x 80")
    • Memory Foam Queen Mattress (60" x 80") (Optional)
    • Under Bed Storage (N/A 38 AB)
  • Bed Slide
    • Window at Head of Bed (DEP)
    • Mounted Headboard  (DEP)
    • Overhead Cabinets
    • Shoe Rack (38 CB Only)
  • Bedroom Storage
    • Wardrobe with Drawers Underneath (N/A 38 CB)
    • Floor-to-ceiling Closet Space (38 CB Only)
    • Bedroom Egress Door (Optional)


  • (1) Porcelain Master Bathroom Sink
  • Solid Surface Lavatory Top
  • Handheld Shower Head with Slide Bar
  • Shower Skylight
  • Shower LED Light with Sliding Cover
  • Towel and Toilet Paper Holders
  • Mirrored Medicine Cabinet
  • Roof Vent Fan
  • Base Cabinet
  • Number of Bathrooms
    • (1) Bathroom (38 AB, 38 CB)
    • (1) Bathroom and (1) Half-bath (38 BB)
  • Shower
    • One-Piece Molded Fiberglass Shower (28.5" x 40.5") (N/A 38 CB)
    • One-Piece Molded Fiberglass Shower (34.5" x 34.5") )38 CB Only)
  • Toilet
    • (1) Gravity Flush Toilet (N/A 38 BB)
    • (1) Electric Gravity Flush Toilet and (1) Macerator Toilet (38 BB Only)

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 the current environment, our features and options are subject to change due to material availability.


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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.