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Tiffin Allegro Bay 38 CB

Class Cbuilt 2023–25Better build tierPatient search on the used market
WHAT ONE COSTS
$310,800est. used (2025, 1 yr old; from 3 priced floorplans of this line)
THE SPECS
Length39.3 ft
Height (incl. A/C)13.3 ft
Width8.4 ft
Interior height6.9 ft
GVWR33,000 lb
Dry weightnot published
Sleeps5
Slide-outs3
Fresh water150 gal
Grey water70 gal
Black water45 gal
Air conditioning30,000 BTU
Fuel100 gal
Engine / chassisCummins B6.7 360 HP / Allison 3000 MH 9-speed on Freightliner S2RV
Generator8.0 kW Onan Quiet Diesel QD 8000

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Rear king memory foam (60×80 queen optional)(Permanent)72×80
  • 1× Front overhead cab bunk, 300 lb capacity(Permanent)—
  • 1× Booth dinette-sleeper(Convertible)72×45
  • 1× Sofa bed(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Tiffin (Better tier): Tiffin's first Super C - a Freightliner S2RV diesel coach carrying a Tiffin Class A interior. (Tiffin also used the Allegro Bay name on a front-engine Class A through about 2013; this entry is the Super C only.)

YEAR BY YEAR: WHAT CHANGED
  • 2023Introduced with the 38 AB and 38 BB
  • 2025Final model year
FINDING ONE

Patient search: weeks of watching, and probably some travel. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Third launch plan, the roomiest at 320 sq ft; dropped after 2025.

OTHER ALLEGRO BAY FLOORPLANS
34 DB · 33,000 lb · sleeps 438 AB · 33,000 lb · sleeps 638 BB · 33,000 lb · sleeps 5the whole line →
Find one for sale

Live listings for the 38 CB on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Allegro Bay line ↗

Is the 38 CB your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from dealer and aggregator listings, retrieved 2026-07.