CamperHardlyKnowHer

Thor Motor Coach Aria 3701

Class Abuilt 2020–22Mixed build tierFindable on the used market
WHAT ONE COSTS
price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

THE SPECS
Length38.4 ft
Height (incl. A/C)12.5 ft
Width8.4 ft
Interior height7.0 ft
GVWR35,320 lb
Dry weightnot published
Sleeps6
Slide-outs2
Fresh water91 gal
Grey water70 gal
Black water51 gal
Air conditioning30,000 BTU
Awning13.5 ft
Fuel100 gal
Engine / chassisCummins ISB-XT 6.7L 360HP/800 lb-ft, Freightliner XC-R, Allison MH-3000
GeneratorOnan RV QD 8000 diesel

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

WHERE PEOPLE SLEEP
  • King bed with Tilt-A-View inclining mechanism(Permanent)72×80
  • Power drop-down overhead cockpit bunk(Stow-away)48×76
  • 98" expanding leatherette L-sofa bed(Convertible)
  • 74" Dream Dinette booth(Convertible)
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameSteel
RoofWalk-on
UnderbellyEnclosed

Thor Motor Coach (Mixed tier): Thor Aria

YEAR BY YEAR — WHAT CHANGED
  • 2020Introduced at 38'-3"
  • 2021Length listed 38'-5"
  • 2022Last model year
FINDING ONE

Findable — a few listed nationwide most weeks. Why: Thor Motor Coach is a volume manufacturer. Estimated from build volume and production span — not a count of live listings.

THE READ

Corner-fireplace living room with a 43" TV and an L-sofa - the entertaining floorplan of the early-2020s Aria.

OTHER ARIA FLOORPLANS
Is the 3701 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 manufacturer spec sheets, retrieved 2026-07.