The Allegro Bay comes standard with Truma AquaGo Comfort Instant Water Heater and a 24-gallon liquid propane tank. You also have the option for the “All-Electric Coach” that features the AquaHot UltraCompact Hydronic Heating System and an induction cooktop which eliminates the need for the propane tank.

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Freightliner logo


The Allegro Bay Freightliner Custom Chassis comes standard with a full-time NoSPIN® differential single rear axle. Full-time traction control minimizes or eliminates wheelspin in wet and adverse conditions like mud and snow.

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Floor Plans

38 AB

38 AB

Features & Options

  • Freightliner Custom S2RV Chassis
  • 360 HP Cummins B6.7 Engine
  • 12,000 LB Tow Capacity
  • LED Headlights
  • TracTech Full Time NOSPIN® Differential
  • Manual Release Valve for Rear Air Suspension
  • Truma AquaGo Comfort Instant Water Heater
  • AGM Extended Cycle House Batteries
  • Spyder Multiplex System w/App Compatibility
  • 8.0 kw Onan® QD Generator
  • Handcrafted Cabinetry
  • All-Electric Option

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Freightliner S2RV Chassis

Chassis Features

38 AB 38 BB
Cummins ISB 6.7 STD STD
Horsepower @ RPM: 360 hp @ 2,600 rpm STD STD
Torque: lb-ft @ RPM: 800 lb-ft @ 1,800 rpm STD STD
Allison 3000 MH 6-Speed Automatic Transmission STD STD
Cruise Control STD STD
Automatic Traction Control STD STD
LED Headlights STD STD
Trac-Tech Full Time No-Spin Differential Single Rear A STD STD
Sachs Front Suspension Shock Absorbers STD STD
Rear Air Suspension with Manual Dump Valve STD STD
Rear Stabilizer Bar STD STD
Alternator Amps: 185 STD STD
(2) 12V Chassis Batteries STD STD
VGT Engine Brakes STD STD
Full Air Brakes STD STD
Heated Air Tanks with Auto Drain Valve STD STD
275/80R 22.5 Michelin Tires STD STD
Quick Disconnect Fitting with Tire Inflation Kit STD STD
Hydraulic Leveling Jacks STD STD

Driver's Compartment Features

38 AB 38 BB
7.75" Colored Multi-Function Touch Screen Stereo with Rear Camera STD STD
View Activated by Reverse and Side Camera View Activated by Turn Signal STD STD
AM/FM Stereo with Bluetooth, Dual USB Ports, Navigation, Apple Carplay/Android Auto STD STD
Back-Lit Instrument Cluster STD STD
Leather Wrapped Steering Wheel STD STD
Adjustable Tilt and Telescoping Steering Column STD STD
Adjustable Driver and Passenger Seats STD STD
Power Windows and Door Locks STD STD
Power Adjustable and Heated STD STD
Side-View Mirrors STD STD
Woodgrain Driver and Center Instrument Panel with Back-Lit Switches STD STD
Pull-Cord for Air Horn STD STD
Auxiliary Start STD STD
Generator Start/Stop STD STD
Forward Roof-Mounted Console with Upper Storage Compartments STD STD
Single Electric Windshield Wiper Motor with Delay STD STD
Marker Light Switch Integrated with Headlight Switch STD STD

Weights & Measures


38 AB 38 BB
Overall Length (approximate) 39'4" 39'4"
Overall Height (approximate, maximum) 13'2" 13'2"
Overall Width (approximate) 101" 101"
Interior Height 82.5" 82.5"
Wheelbase 279" 279"
Fuel Tank (gallons) 100 100
DEF Tank1 (gallons) 10 10
Fresh Water (gallons) 150 150
Black Tank (gallons) 45 45
Grey Tank (gallons) 70 70
LPG Tank (gallons) 24 24
GAWR Front 12,000 lb 12,000 lb
GAWR Rear 21,000 lb 21,000 lb
GVWR 33,000 lb 33,000 lb
GCWR 45,000 lb 45,000 lb
Hitch Rating2 12,000 lb 12,000 lb

1 Diesel Exhaust Fluid (DEF) is the active component used in Selective Catalytic Reduction (SCR) engines to reduce nitrogen oxide emissions by 90% to meet EPA standards.

2 Maximum Trailer Weight is dependent on the loading and towing variables which include the GVWR, GAWR, and GCWR, as well as adequate trailer brakes.

Plumbing & Electrical Features


38 AB 38 BB
Spyder Multiplex Control System STD STD
Truma AquaGo Comfort STD STD
Continuous Hot Water STD STD
8KW Onan® Quiet Diesel Generator STD STD
(2) 15k BTU Air Conditioners STD STD
35k BTU LP Furnace STD STD
50-Amp Power Cord on Power Cord Reel STD STD
(4) AGM Extended Cycle House Batteries STD STD
2000 W Inverter with Auto- Generator Start STD STD
Integrated SurgeGuard STD STD
AquaView ShowerMiser STD STD
Water Filtration System STD STD
Water Pump STD STD
Exterior Sewer Bay with Winterization System STD STD
Fresh Water Hookup for City Water and Tank Fill STD STD
Exterior Rinse Hose/Shower STD STD
Gravity Evacuation Ports for STD STD
Black and Grey Tanks STD STD
Black Tank Flush STD STD

Available Options

38 AB 38 BB
Lithium House Batteries3 OPT OPT
Wifi Connectivity w/ LTE OPT OPT
In-motion Satellite Dish4 OPT OPT
Satellite Prep STD STD
Solar Prep OPT OPT
(3) Solar Panels OPT OPT
All Electric Coach (AquaHot 250D + Induction Cooktop) OPT OPT

3 Cannot pair AGM Extended Cycle House Batteries and Lithium House Batteries together.

4 High-definition programming is not available on a domed satellite antenna unless you subscribe to DISH Network®.



38 AB 38 BB
Fiberglass Front and Rear Caps STD STD
One-Piece Fiberglass Roof STD STD
Full Body Paint with Protective Film in Select Areas STD STD
1/4" Thick Single Pane Windows STD STD
Girard Patio Awning with LED Lighting STD STD
Girard Slideout Toppers STD STD
Exterior TV with Sound Bar STD STD
Keyless Entry for Entry Door STD STD
Rear Roof Ladder STD STD
Electric Triple Entrance Step STD STD
Exterior Undercoating STD STD
Pass-Through Storage with Automatic Compartment Lights STD STD
Convenient Side-Swinging Compartment Doors with Gas Shocks and Lockable Door Latches STD STD



38 AB 38 BB
Raised Flat Panel Handcrafted Cabinet Doors STD STD
Handcrafted Cabinet Fascias STD STD
Solid Surface Countertops STD STD
Soft Touch Vinyl Ceiling STD STD
Centralized Entertainment Center with BluRay® Player for TVs STD STD
Luxury Vinyl Tile Throughout Coach STD STD
Treated Carpet and Decor Fabrics STD STD
Ball Bearing Soft-Close Drawer Slides STD STD
Solar and Privacy Shades STD STD
Overhead Bunk STD STD
Power Roof Vents STD STD
Smoke Detector STD STD
Carbon Monoxide Detector STD STD
LED Lighting STD STD
LPG Leak Detector STD STD

Available Options

38 AB 38 BB
Handcrafted Cabinetry: Amber Glazed OPT OPT
Handcrafted Cabinetry: Shadow OPT OPT
Fabric Suites: Silver Light III OPT OPT
Fabric Suites: Urban Putty II OPT OPT
Luxury Vinyl Tile: Sandcastle (Matte Finish) STD STD
Ultraleathers: Belgian OPT OPT
Ultraleathers: Cocoon OPT OPT
Combo Washer/Dryer OPT
Stacked Washer/Dryer OPT

All options may not be available on every model. Because of progressive improvements and specifications, standard and optional equipment are subject to change without notice or obligation. For a complete and up-to-date list of available options and specifications, visit

For all information concerning the limited warranty provided by Tiffin, please refer to the full, written limited warranty set forth on the Tiffin website or held by our authorized dealerships.



38 AB 38 BB
Residential Refrigerator STD STD
Double Bowl Kitchen Sink with Single Lever Chrome Faucet STD STD
Panoramic Galley Window STD STD
Solid Surface Galley Countertop, Sink Cover, and Cooktop Cover STD STD
3-burner Cooktop with Convection Microwave STD STD
Expand-An-Island STD STD

Available Options

38 AB 38 BB
Dishwasher OPT OPT

Living Area/Dinette Options


38 AB 38 BB
Ultraleather Booth Dinette/Sleeper on Driver Side STD
Dinette with Computer Workstation on Driver Side OPT
Dining Bar on Driver Side 7 OPT
Ultraleather Booth Dinette with Lift TV on Driver Side STD
Dinette with Computer Workstation with Lift TV on Driver Side OPT
Dining Bar with Lift TV on Driver Side OPT
Ultraleather DE Sofa Bed on Driver Side STD
Ultraleather Theater Seating on Driver Side OPT
Ultraleather Theater Seating on Passenger Side OPT
Ultraleather Air Coil Sofa on Passenger Side STD
Ultraleather Air Coil Sofa with Lift TV on Passenger Side STD



38 AB 38 BB
Wardrobe with Automatic Light STD STD
Bed Comforter with Throw Pillows STD STD
Flat Panel TV STD STD
Memory Foam Queen Mattress (60" x 80") STD STD
Solar/Privacy Shades STD STD
Ceiling Fan STD STD

Available Options

38 AB 38 BB
Memory Foam King Mattress OPT OPT
Egress Rear Exit OPT OPT



38 AB 38 BB
Medicine Cabinet STD STD
Skylight and LED Light in Shower STD STD
Molded One-piece Fiberglass Shower STD STD
Solid Surface Vanity Top STD STD
Roof Vent Fan STD STD

Premium Paint System

Select a Color

G1 Fire Opal

Colors and features are visual representations.

Décor Options

  • Backsplash
  • Countertop
  • Living Room Pillow
  • Living Room Pillow
  • Living Room Pillow
  • Bedspread
  • Bedroom Sham
  • Bedroom Pillow
  • Window–Accent
  • Window–Base
  • 10years or 50,000 miles unitized construction limited warranty
  • 5years or 50,000 miles delamination limited warranty
  • 1year or 12,000 miles limited warranty
  • 1year coach roadside service
  • ongoing owner support
MY19 Red Lifestyle1

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We know it's not just about where a coach will take you, but the experience you take from the journey. That's why every Tiffin motorhome is made to move you.

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