CamperHardlyKnowHer

Monaco Diplomat 40PDQ

Class Abuilt 2005–13Mixed build tierPatient search on the used market
WHAT ONE COSTS
$162,800est. used (2013, 13 yr old)

Sticker was $349,404 in 2013 — out of production since 2013, so the used market is the only way to buy one. Estimate assumes a 2013 unit.

THE SPECS
Length41.4 ft
Height (incl. A/C)12.6 ft
Width8.4 ft
Interior height7.0 ft
GVWR36,000 lb
Dry weightnot published
Sleeps8
Slide-outs4
Fresh water100 gal
Grey water62 gal
Black water40 gal
Fuel100 gal
GeneratorOnan 8.0 kW Quiet Diesel

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

WHERE PEOPLE SLEEP
  • Master king bed (queen 60x80 in the earlier years)(Permanent)72×80
  • Roadside sofa bed(Convertible)
  • Curbside sofa bed / dinette(Convertible)
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Monaco (Mixed tier): Monaco Coach Corp (2005-2009), Navistar RV (2010-2013), REV Recreation Group (2014-2017)

YEAR BY YEAR — WHAT CHANGED
YEARSGVWRDRYMSRP
2005–0733,000 lb$349,404
200833,000 lb$261,101
2009–1336,000 lb$349,404
  • 2005Introduced at 40'6", 33,000 lb GVWR, Cummins ISL 400
  • 2008Stretched to 41'7", GVWR raised to 33,000-36,000 lb, 261 in wheelbase
  • 2011Cummins ISL replaced by the Navistar MaxxForce 10
  • 2013Last model year
FINDING ONE

Patient search — weeks of watching, and probably some travel. Why: 9-year production run; 13 years out of production. Estimated from build volume and production span — not a count of live listings.

THE READ

The longest-running Diplomat floorplan — quad slide, grew from 40'6" and 33,000 lb in 2005 to 41'5" and 36,000 lb by 2008.

OTHER DIPLOMAT FLOORPLANS
Is the 40PDQ 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.