Tiffin Allegro Bay RV
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Tiffin Allegro Bay Super C Diesel Motorhomes For Sale
Tiffin Allegro Bay Super C diesel motorhomes for sale at Motor Home Specialist, the #1 Volume Selling Motor Home Dealer in the World. The Tiffin Allegro Bay is a Super C diesel motorhome (classified by Tiffin as a Class C) built on the heavy-duty Freightliner S2RV chassis with the Cummins B6.7 diesel at 360 horsepower and 800 lb-ft of torque. Shopping for a new Tiffin Allegro Bay or a used Tiffin Allegro Bay? MHSRV stocks one of the largest selections of Tiffin Allegro Bay motorhomes for sale in the country, all backed by industry-leading discount pricing.
The Allegro Bay is built for buyers who want serious diesel chassis credentials, Tiffin's residential luxury interior, and the family-friendly cab-over bunk of a Class C platform paired with the heavy-duty diesel powertrain usually found in a Class A diesel pusher. Full air brakes, a 12,000-pound trailer hitch, an Allison 3000 MH 6-speed automatic, a 33,000-pound GVWR, and a 45,000-pound GCWR put it firmly in Super C territory next to competitors like the Thor Inception (which runs the same Freightliner S2RV chassis and the same Cummins B6.7 base engine). It's a strong pick for full-time travel, serious touring, and buyers who want a Class-C driving position without giving up diesel-pusher capability.
Freightliner S2RV Chassis, Cummins B6.7, and Air Brakes
Every Allegro Bay pairs the Freightliner S2RV chassis with the Cummins B6.7 diesel (360 hp, 800 lb-ft of torque) and the Allison 3000 MH 6-speed automatic transmission with lock-up torque converter. Standard chassis equipment includes a full air brake system with automatic slack adjusters, Freightliner BrakeSync, automatic traction control, custom-tuned Sachs shock absorbers, an Eaton Tractech NoSPIN differential, taper-leaf front suspension, Freightliner Airliner rear air suspension with manual dump valve, and a variable geometry turbocharger (VGT) engine brake for mountain descents. The 12,000-pound trailer hitch and 45,000-pound GCWR clear the way for a full toad vehicle, an enclosed trailer, or a boat. The 100-gallon fuel tank handles long-haul travel between fill-ups.
Hydronic Heating and Electronic Appliance Equipped (All-Electric Option)
One of the Allegro Bay's most distinctive features is the optional Hydronic Heating and Electronic Appliance Equipped coach configuration (formerly marketed as "All-Electric Coach"). This option swaps the standard ducted LP furnace, the Truma AquaGo instant water heater, and the three-burner LP cooktop for an Aqua-Hot 250D heat exchanger (which supplies both cabin heat and hot water) plus a two-burner induction cooktop, and it removes the LPG tank entirely. Buyers who prefer all-electric cooking, hydronic heating for cabin and water, and reduced LP dependency choose the hydronic build. Buyers who prefer LP simplicity choose the standard LP coach. All-electric configurations are increasingly rare in this segment, and the Allegro Bay is one of the few Super Cs that offers one.
Off-Grid Power and Climate
Standard electrical is an 8.0-kW Onan Quiet Diesel generator, a 2,000-watt pure sine inverter/charger with auto-gen start, four 6-volt 210-Ah extended-cycle AGM house batteries, and 50-amp shore power with a powered retract reel. Optional upgrades include dual 12-volt 270-Ah lithium house batteries and a 600-watt rooftop solar package (three 200-watt panels with a 30-amp controller). Climate control uses dual 15,000-BTU rooftop A/Cs with heat pumps standard. That electrical stack pairs the diesel generator's runtime with real rooftop solar generation for extended boondocking.
Coach Control and Cockpit
Coach control runs through the Spyder Controls Multiplex System with the Firefly Integrations Mira Module (7.5-inch main monitor, an interior entryway color touchscreen, and additional Spyder color touchscreens throughout). The Vegatouch app adds Bluetooth-range smartphone control of auto-gen start, lighting, climate, and water pump. The driver's compartment carries Mitchell Lifestyle Leather pneumatic suspension seats for driver and passenger (dual armrests, lumbar, tilt/fore-aft/backrest/height adjustment), a leather-wrapped tilt and telescoping steering wheel, an ergonomic dash with woodgrain accents, side-view cameras, a color backup camera, and a 10-inch detachable touchscreen with media, satellite radio, Bluetooth, navigation, and camera monitoring. A cab skylight and pull-cord air horn are standard.
Exterior
Every Allegro Bay carries full-body paint with three layers of clear coat (seven colors: Midnight Blue G2, Fire Opal G3, Bordeaux G3, Crimson Mist G3, Frosted Granite G3, Polar Frost G3, White Mahogany G3), frameless tinted windows, a Girard side-mounted power patio awning with LED lighting, Girard slide-out toppers, side-swinging exterior storage doors with gas shocks, GatorHyde-lined cargo walls and floor, an exterior TV with soundbar, an automatic double entry step, and a lightweight entry door with integrated screen.
Interior, Kitchen, and Bath
Every floor plan carries handcrafted overhead cabinetry with honeycomb-patterned glass, dimmable LED lighting, soft-close drawers, solar and privacy shades, a soft-touch vinyl ceiling, and a solid-surface galley countertop with full tile backsplash. Kitchen standard equipment includes a 20-cu-ft stainless steel residential refrigerator with top freezer, a 1.7-cu-ft smart convection microwave with air fry, and a double-bowl kitchen sink with single-lever faucet and pull-down sprayer. An optional drawer-style dishwasher is available across the lineup. The Allegro Bay pairs the Aqua View SHOWERMISER water-saving valve with the Truma AquaGo Comfort instant water heater (LP coach) or the Aqua-Hot 250D (hydronic coach). Three interior decor packages carry: Vapor, Morocco, and the Adobe Pendleton National Parks Collection, with three cabinetry color options, three leather upholstery options, and two floor tile options (Articulo White Polished or Weathered Beige Matte).
Sleeping Configurations
Every Allegro Bay floor plan carries a memory foam King mattress (72" x 80") standard in the master bedroom, with a memory foam Queen (60" x 80") available as an option. Every floor plan also includes the standard front cab-over overhead bunk with privacy curtains and telescoping ladder, supporting up to 300 pounds for guest sleeping (the family-friendly cab-over bunk is a defining Super C feature). The master bedroom includes a handcrafted privacy door, LED reading lights, nightstands with solid-surface tops, a mounted bedroom TV, a ceiling fan, a wardrobe with drawers underneath, and a centralized entertainment center with Blu-ray, satellite receiver, and cable TV hookup. An optional bedroom egress door is available across the lineup.
Floor Plans at MHSRV
The Tiffin Allegro Bay is available at MHSRV in three floor plans. Each covers a different buyer inside the Super C diesel category.
Allegro Bay 38 AB. 39'4" length, ~310 sq ft, 3 slides, sleeps 4-6, single bath. The family-focused floor plan with the largest seat-belt configuration (6-8 belts) and the standard 74-inch DE sofa bed plus 75-inch booth dinette-sleeper for maximum sleeping capacity. Pick this floor plan for family or group travel with kids or extra guests.
Allegro Bay 38 BB. 39'4" length, ~315 sq ft, 3 slides, sleeps 3-5, bath-and-a-half. The luxury flagship of the lineup with a 74-inch air-coil sofa bed with furniture-mounted swivel tables and heated fresh/holding tank compartments via heat duct (vs. tank pads on the other floor plans). The only Allegro Bay with a half-bath. Pick this floor plan for full-time travel and extended trips where the second toilet matters.
Allegro Bay 34 DB. 35'7" length, ~250 sq ft, 2 slides, sleeps 3-4, single bath. The compact couples-focused floor plan, optionally configured with a Murphy bed sofa for additional daytime flexibility. Pick this floor plan for a couples-only Super C that's easier to park and drive than the 38-footers.
Cross-shopping the Allegro Bay? Buyers looking for a smaller-footprint Class A gas alternative should look at the Tiffin Open Road Allegro. Buyers looking to step up to a Class A diesel pusher usually compare the Tiffin Allegro Red (entry-tier), the Tiffin Phaeton (mid-tier), or the flagship Tiffin Allegro Bus. All are available at MHSRV alongside the full Tiffin lineup.
Tiffin Allegro Bay FAQs
What is the Tiffin Allegro Bay?
The Tiffin Allegro Bay is a Super C diesel motorhome built by Tiffin Motorhomes on the heavy-duty Freightliner S2RV chassis with the Cummins B6.7 diesel at 360 hp and 800 lb-ft of torque. Tiffin classifies it as a Class C in their own marketing, but by industry convention (and at MHSRV) it sits in the Super C category since it pairs a Class C cab-over body style with the heavy-duty diesel chassis, air brakes, and towing capability of a Class A diesel pusher. It's built for extended travel and full-time RV living.
Is the Tiffin Allegro Bay a Class C or a Super C?
Both, depending on who's classifying it. Tiffin markets the Allegro Bay as a Class C because of the cab-over body style. Industry convention (and MHSRV) puts it in the Super C category because of the Freightliner S2RV chassis, the Cummins B6.7 diesel, the Allison 3000 MH transmission, the full air brake system, the 12,000-pound hitch, the 33,000-pound GVWR, and the 45,000-pound GCWR. Every one of those specs aligns with the Super C category as Thor, Newmar, and other manufacturers define it. Search for a Class C diesel or a Super C, and the Allegro Bay shows up in both hunts.
What chassis is the Tiffin Allegro Bay built on?
The Tiffin Allegro Bay is built on the Freightliner S2RV chassis with the Cummins B6.7 diesel at 360 horsepower and 800 lb-ft of torque, paired with the Allison 3000 MH 6-speed automatic transmission with lock-up torque converter. Standard chassis equipment includes a full air brake system with automatic slack adjusters, Freightliner BrakeSync, automatic traction control, custom-tuned Sachs shock absorbers, an Eaton Tractech NoSPIN differential, taper-leaf front suspension, Freightliner Airliner rear air suspension with manual dump valve, and a variable geometry turbocharger (VGT) engine brake.
How much can the Tiffin Allegro Bay tow?
The Tiffin Allegro Bay carries a 12,000-pound trailer hitch with a 12,000-pound maximum trailer weight rating, well beyond what most Class A and Class C gas motorhomes handle. The 33,000-pound GVWR and 45,000-pound GCWR put the Allegro Bay among the more capable coaches in the diesel segment for buyers who plan to tow a full-size toad vehicle, enclosed trailer, boat, or another heavy load behind the coach.
What is the difference between the LP and Hydronic / All-Electric Allegro Bay configurations?
The Allegro Bay is available in two power configurations. The standard LP coach uses propane for the ducted furnace, the Truma AquaGo instant water heater, and the three-burner LP cooktop. The optional Hydronic Heating and Electronic Appliance Equipped configuration (formerly marketed as All-Electric Coach) swaps those LP appliances for an Aqua-Hot 250D heat exchanger (which supplies both cabin heat and hot water) and a two-burner induction cooktop, and it removes the LPG tank entirely. Pick the standard LP coach for LP simplicity and lower entry cost. Pick the hydronic build for all-electric cooking, hydronic heating, and reduced LP dependency (this build is increasingly rare in the Super C diesel segment).
What floor plans does the Tiffin Allegro Bay come in?
The Tiffin Allegro Bay is available at MHSRV in three floor plans: the 38 AB (39'4" length, ~310 sq ft, 3 slides, sleeps 4-6, single bath, the family-focused plan with maximum sleeping and seat-belt capacity), the 38 BB (39'4" length, ~315 sq ft, 3 slides, sleeps 3-5, bath-and-a-half, the luxury flagship with heated fresh and holding tank compartments), and the 34 DB (35'7" length, ~250 sq ft, 2 slides, sleeps 3-4, single bath, the compact couples-focused plan with optional Murphy-bed sofa).
Does the Tiffin Allegro Bay come in a bath-and-a-half floor plan?
Yes. The Tiffin Allegro Bay 38 BB is the bath-and-a-half floor plan in the lineup, with a full bathroom plus a half-bath. The 38 BB carries one electric gravity flush toilet and one macerator toilet, giving owners flexibility across different sewer hookup situations. Full-time travelers and shoppers hosting frequent guests usually gravitate to the 38 BB.
How does the Tiffin Allegro Bay handle off-grid power?
Standard electrical on the Allegro Bay is an 8.0-kW Onan Quiet Diesel generator, a 2,000-watt pure sine inverter/charger with auto-gen start, four 6-volt 210-Ah extended-cycle AGM house batteries, and 50-amp shore power with a powered retract reel. Optional upgrades include dual 12-volt 270-Ah lithium house batteries and a 600-watt rooftop solar package (three 200-watt panels with a 30-amp controller). That combination supports extended boondocking without shore power.
How does the Tiffin Allegro Bay compare to the Thor Inception?
The Allegro Bay and the Thor Inception are both Super C diesel motorhomes on the Freightliner S2RV chassis with a Cummins 6.7-liter diesel base engine (the Allegro Bay uses the Cummins B6.7 at 360 hp / 800 lb-ft; the Inception uses the closely related ISB-XT tune at 360 hp / 800 lb-ft). Both use cab-over Class C body styling. The Allegro Bay differentiates with Tiffin's residential interior treatment, the Allison 3000 MH transmission, the optional Hydronic Heating and Electronic Appliance Equipped all-electric build, and the bath-and-a-half 38 BB floor plan. The Inception carries Thor's own interior styling, floor plan set, and standard equipment mix. Pick the Allegro Bay for Tiffin's interior fit and finish and the all-electric configuration option. Pick the Inception for Thor's floor plan variety (including the HD 38XL bunk model on the Inception HD trim). MHSRV carries both, so shoppers can compare them side by side at one location.
Do I need a CDL to drive the Tiffin Allegro Bay?
Federal law exempts motorhomes from CDL requirements, so a commercial driver's license is not required regardless of size. However, the Allegro Bay's 33,000-pound GVWR is above the 26,001-pound threshold that some states use for a non-commercial license class (not a CDL, but a state-specific endorsement). States that require a non-commercial Class A or B for motorhomes over 26,000 pounds include California, Hawaii, Nevada, Wisconsin, and a handful of others; the exact rules and thresholds vary by state and change over time. Check your specific state's DMV rules for motorhomes over 26,000 pounds before purchase. For most buyers, a standard passenger driver's license is sufficient.
Where can I buy a Tiffin Allegro Bay?
Motor Home Specialist in Alvarado, Texas is the #1 volume-selling motor home dealer in the world and stocks one of the largest selections of new and used Tiffin Allegro Bay Super C diesel motorhomes for sale anywhere in the country. MHSRV serves Tiffin Allegro Bay buyers nationwide and offers in-house financing, trade-ins, and full-service support after the sale.
Manufacturer options, features, colors, etc. can all change without notice and MHSRV assumes no responsibility for the changes or possible errors in information provided by the manufacturer. All weights and measurements are approximate and not guaranteed to be 100% accurate. For the latest information be sure to check with your salesperson and/or the coach manufacturer and verify before purchase.
