2025 Grand Design Imagine 3100RD vs 2024 Keystone Montana 3791RD

Detailed Comparison

Head to head, the 2025 Grand Design Imagine 3100RD and the 2024 Keystone Montana 3791RD each bring unique strengths to the table. Which one deserves a spot in your driveway?

Starting with size, the Grand Design Imagine 3100RD measures 28.5 ft long and tips the scales at 3,500 lbs dry weight. The Keystone Montana 3791RD comes in at 40.5 ft with a dry weight of 10,300 lbs. That gives the Keystone Montana 3791RD roughly 12.0 extra feet of length.

For sleeping arrangements, the Grand Design Imagine 3100RD offers room for 2 and the Keystone Montana 3791RD can handle 10. The Grand Design Imagine 3100RD benefits from 3 slide-out(s), expanding the interior when parked.

Looking at self-sufficiency, the Grand Design Imagine 3100RD packs 46 gal of fresh water and 400W of solar. The Keystone Montana 3791RD counters with 68 gal fresh water and 550W solar.

Price is often the deciding factor. The Grand Design Imagine 3100RD starts at $71,000 MSRP, while the Keystone Montana 3791RD commands $72,000 — a $1,000 gap.

Families with kids will appreciate the extra sleeping capacity and living space. Off-grid campers should pay close attention to solar wattage, battery capacity, and tank sizes. Full-timers should prioritize tank capacity, storage, and overall living comfort.

Ultimately, both rigs have their merits — test drive each one and see which floor plan speaks to your lifestyle.