CamperHardlyKnowHer

Tiffin Phaeton 40 IH

Class Abuilt 2018– (in production)Better build tierPatient search on the used market
WHAT ONE COSTS
$609,700MSRP today

Still in production — a used 2023 would run roughly $420,700.

THE SPECS
Length41.3 ft
Height (incl. A/C)13.3 ft
Width8.4 ft
Interior height6.9 ft
GVWR40,000 lb
Dry weightnot published
Sleeps6
Slide-outs4
Fresh water100 gal
Grey water100 gal
Black water55 gal
Air conditioning15,000 BTU
Fuel100 gal
Engine / chassisCummins L9 450 hp diesel on PowerGlide XSH / Freightliner XCR chassis
GeneratorOnan 10.0kW Quiet Diesel

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

WHERE PEOPLE SLEEP
  • Memory-foam king in the rear bedroom; queen optional(Permanent)72×80
  • 74" air-coil sofa bed, driver side(Convertible)72×52
  • 72" booth dinette-sleeper, passenger side(Convertible)69×45
  • 68" DE sofa bed with lift TV, passenger side(Convertible)61×49
  • Optional electric front overhead drop-down bunk(Stow-away)30×72
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Tiffin (Better tier): Tiffin's mid-line diesel pusher: Crane Noble all-composite sidewalls, tubular aluminum framing, steel basement and a Freightliner PowerGlide raised-rail chassis with ZF independent front suspension - genuinely well built, with the caveat that post-2021 Thor-era service is not what the family-run years were.

YEAR BY YEAR — WHAT CHANGED
YEARSGVWRDRYMSRP
2018–2339,600 lb$609,673
2024–2539,660 lb$609,673
2026–40,000 lb$609,673
  • 2018Introduced (GVWR 39,600 lb, Cummins ISL/L9 380 hp)
  • 2018Introduced at 39,600 lb GVWR with the Cummins ISL/L9 380 hp; MSRP $360,860
  • 2024Cummins L9 450 hp / 1,250 lb-ft replaces the 380 hp engine; GVWR nudged to 39,660 lb
  • 2024Cummins L9 450 hp / 1,250 lb-ft replaces the 380 hp; GVWR nudged to 39,660 lb
  • 2026GVWR raised to 40,000 lb, GCWR to 50,000 lb, front GAWR to 16,000 lb; Starlink Pro and Pet Perks options added; XSH-generation chassis changes across the line
  • 2026GVWR raised to 40,000 lb, GCWR to 50,000 lb; Starlink Pro option added
FINDING ONE

Patient search — weeks of watching, and probably some travel. Why: 9-year production run; still in production. Estimated from build volume and production span — not a count of live listings.

THE READ

The sweet spot of the Tiffin diesel range - 41 ft, four slides, bath-and-a-half, and enough chassis to actually use the storage. Buy 2024-up if you want the 450 hp engine.

OTHER PHAETON FLOORPLANS
Is the 40 IH 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 and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

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