Thor Motor Coach Aria 3701

Name: Thor Motor Coach Aria 3701
Brand: Thor Motor Coach

Class Abuilt 2020–22Mixed build tierFindable on the used market

WHAT ONE COSTS

$233,400est. used (2022, 4 yr old; from 3 priced floorplans of this line)

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

1× King bed with Tilt-A-View inclining mechanism(Permanent)72×80
1× Power drop-down overhead cockpit bunk(Stow-away)48×76
1× 98" expanding leatherette L-sofa bed(Convertible)—
1× 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.

OUR TAKE

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

OTHER ARIA FLOORPLANS

3401 · 32,400 lb · sleeps 4 3601 · 35,320 lb · sleeps 6 3702 · 35,320 lb · sleeps 4 3901 · 35,320 lb · sleeps 6 3902 · 35,320 lb · sleeps 6 4000 · 35,320 lb · sleeps 8 the whole line →

Find one for sale

Live listings for the 3701 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 Aria line ↗

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, 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 manufacturer spec sheets, retrieved 2026-07.