Monaco Diplomat 40PAQ

Name: Monaco Diplomat 40PAQ
Brand: Monaco

Class Abuilt 2005–05Mixed build tierScarce on the used market

WHAT ONE COSTS

$126,700est. used (2005, 21 yr old; from 15 priced floorplans of this line)

THE SPECS

Length40.5 ft

Height (incl. A/C)12.3 ft

Width8.4 ft

Interior height6.8 ft

GVWR33,000 lb

Dry weightnot published

Sleeps4

Fresh water100 gal

Grey water62 gal

Black water40 gal

Fuel100 gal

Engine / chassisCummins ISL 400 hp 8.9L / Roadmaster RR8R, Allison 3000 MH 6-speed

GeneratorOnan 8.0 kW Quiet Diesel

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

WHERE PEOPLE SLEEP

1× Master queen bed with solid-surface nightstands(Permanent)60×80
1× Roadside Easy Bed sofa(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

2005Introduced

FINDING ONE

Scarce: months of watching; be ready to fly and drive it home. Why: only one model year; 21 years out of production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Quad-slide 40-footer built around a barrel chair and a Euro-recliner rather than twin sofas.

OTHER DIPLOMAT FLOORPLANS

36SKT · 33,000 lb · sleeps 4 38PDD · 33,000 lb · sleeps 4 38PDQ · 33,000 lb · sleeps 6 40DST · 33,000 lb · sleeps 4 40PDQ · 36,000 lb · sleeps 8 40PRQ · 33,000 lb · sleeps 6 41PDQ · 36,000 lb · sleeps 8 41SKQ · 36,000 lb · sleeps 8 43D · 44,600 lb · sleeps 6 43DF · 44,600 lb · sleeps 8 43DFT · 43,000 lb · sleeps 8 43G · 44,600 lb · sleeps 6 43P · 44,600 lb · sleeps 6 43PDQ · 43,000 lb · sleeps 8 the whole line →

Find one for sale

Live listings for the 40PAQ 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 Diplomat line ↗

Is the 40PAQ 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.