CamperHardlyKnowHer

Thor Motor Coach Quantum PD31

Class Cbuilt 2016–20Mixed 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
Length31.3 ft
Height (incl. A/C)11.2 ft
Width8.3 ft
Interior height7.0 ft
GVWR14,500 lb
Dry weightnot published
Sleeps5
Fresh water40 gal
Grey water28 gal
Black water28 gal
Awning16 ft
Fuel55 gal
Engine / chassisFord E-450 6.8L V10

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

WHERE PEOPLE SLEEP
  • 1× rear queen bed(Permanent)60×80
  • 1× cab-over bunk(Permanent)54×74
  • 2× convertible sofa/dinette(Convertible)—
HOW IT'S BUILT — 3/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyOpen

Thor Motor Coach (Mixed tier): Thor Motor Coach

YEAR BY YEAR — WHAT CHANGED
  • 2016Introduced
  • 2020Final 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

One of the three plans the Quantum launched with in 2016.

OTHER QUANTUM FLOORPLANS
CR24 · 11,030 lb · sleeps 5DS24 · 11,030 lb · sleeps 3GL24 · 12,125 lb · sleeps 4GR22 · 12,500 lb · sleeps 5HS31 · 14,500 lb · sleeps 5JM31 · 14,500 lb · sleeps 5KM24 · 11,030 lb · sleeps 5KW29 · 14,500 lb · sleeps 5LC19 · 11,500 lb · sleeps 3LC21 · 12,500 lb · sleeps 4LC22 · 12,500 lb · sleeps 5LC25 · 12,500 lb · sleeps 5LC26 · 14,500 lb · sleeps 5LC28 · 14,500 lb · sleeps 5the whole line →
Is the PD31 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.