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Thor Motor Coach Quantum LC21

Class Cbuilt 2025– (in production)Mixed build tierFindable on the used market
WHAT ONE COSTS
$127,700MSRP today

Still in production. A used 2023 would run roughly $75,300.

THE SPECS
Length24.1 ft
Height (incl. A/C)11.0 ft
Width8.3 ft
Interior height7.0 ft
GVWR12,500 lb
Dry weightnot published
Sleeps4
Fresh water40 gal
Grey water37 gal
Black water24 gal
Awning15 ft
Fuel55 gal
Engine / chassisFord E-350 7.3L V8 (Chevy 6.6L alt.)
Generator4.0 kW dual gas/LP

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

WHERE PEOPLE SLEEP
  • 1× rear corner full bed(Permanent)54×80
  • 1× cab-over bunk(Permanent)52×91
  • 1× 76 in dream 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
  • 2025Introduced
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Thor Motor Coach is a volume manufacturer; only 2 model years; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Cheapest way into a 24 ft Quantum with a real corner bed and corner bath.

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 3LC22 · 12,500 lb · sleeps 5LC25 · 12,500 lb · sleeps 5LC26 · 14,500 lb · sleeps 5LC28 · 14,500 lb · sleeps 5LF31 · 14,500 lb · sleeps 7the whole line →
Find one for sale

Live listings for the LC21 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 Quantum line ↗

Is the LC21 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.