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2007 Monaco Diplomat 40PDQ - 400 HP Cummins ISL (No DEF) - Quad Slide Luxury Diesel Pusher

Engine: 400 HP Cummins ISL 8.9L / 1200 lb-ft Torque

Chassis: Roadmaster RR8R (8 Air Bags / 8 Shocks)

Slides: 4 Flush-Floor Hydraulic Slides

Sleeping Capacity: Sleeps up to 6 comfortably (Queen master, full air mattress Hide-A-Bed, Jacknife twin Easy Bed)

Climate Control: Dual 13.5M BTU air conditioners with heat pumps and digital thermostat

Misc.: Sole owner, listing for parent (mom) after dad passed away recently. Storage unit/garage kept EVERY winter. Inspected April '26 (only need a new shock absorber - receipt attached).


The 2007 Monaco Diplomat 40PDQ is a luxurious Class A motorhome that is sure to impress even the most discerning RV enthusiasts. With a mileage of 71,163 miles, this well-maintained vehicle offers both style and functionality for your on-the-road adventures.

Tire details (well at least what's known!). I wasn't able to receive other tire pics because I believe the dates are on the inside under the chassis. Buuuut, the driver front tire was manufactured in Sept. 2020, and the driver rear outside manufactured in Dec. 2020 (pics attached). In that time span, my folks traveled to Myrtle Beach, SC each summer from Mars, PA, plus one other trip to Tionesta, PA, for a total of approx. 5500 miles on these tires since late 2020 after those tires were manufactured.

Monaco has paired the 400 HP Cummins ISL 8.9L turbo diesel engine with the Allison 3000 MH 6-speed World Transmission and an electronic shifter. The Cummins Onan Quiet diesel 8.0 kW generator - 578 hours currently (pic attached) - is built on the proprietary Roadmaster RR8R Raised Rail diesel pusher chassis and 8 outboard-mounted air bags and 8 gas shock absorbers. All of this gives incredible hill climbing power with 1200 lb-ft of torque and features a 10,000 lb towing capacity blowing away smaller-engine coaches. And don't forget that the 2007 engine builds are highly sought after because they do not require DEF (Diesel Exhaust Fluid).

The Monaco Diplomat is known for its high-quality construction and attention to detail, and this model is no exception. From the sleek exterior design to the spacious and well-appointed interior, every aspect of this motorhome exudes elegance and sophistication. Solid surface countertops throughout the kitchen and bath (no cheap laminates), as well as solid hardwood cabinetry that are heavy, residential grade wood, not wrapped particle board. And be sure to note the extra installation of the braided trim pieces personally done by the owner- our dad! The level of detail continued with many upgrades including MCD window shades, porcelain tile on the steps, entry and living area floor, as well as the bedroom. The enhancements continue outside as well with full body graphics continued on the ends of all slideouts. And the full-body paint with gelcoat walls is a tremendous upgrade over the peeling decals found on cheaper motorhomes.

The PDQ layout is one of the most popular four-slide/power awning floorplans Monaco ever made because of how it handles space when extended featuring opposing dual sleeper sofas and a massive, open-concept front living/kitchen area. The living area features plush seating, a dining table, and plenty of storage options for all your travel essentials. The kitchen is equipped with modern appliances including a full size residential refrigerator, ample counter space, and a large pantry for all your cooking needs. Unlike the cramped coaches that have a single long sofa and a tiny booth dinette, families and road trip guests will appreciate the comfort of the two opposing sleeper sofas- the driver's side full/double Hide-A-Bed air mattress and the passenger side Easy Bed narrow twin/cot size.

In the rear of the motorhome, you'll find a cozy bedroom with a comfortable queen size bed, wardrobe storage, and a full bathroom with a shower and amenities plus a washer/dryer. Everything you need to relax and unwind after a long day on the road.

The Monaco Diplomat 40PDQ is also equipped with a powerful engine and smooth handling, making it a pleasure to drive on both highways and back roads. With its spacious layout and high-end finishes, this motorhome is ideal for long road trips, weekend getaways, or full-time living, so don't delay and schedule a test drive today and make this beautiful, immaculately maintained motorhome YOURS!