2024 Keystone Montana 3791RD vs 2025 Keystone Impact 332

Detailed Comparison

Both the 2024 Keystone Montana 3791RD and the 2025 Keystone Impact 332 have loyal followings, and for good reason. Here's an objective look at how they measure up.

Starting with size, the Keystone Montana 3791RD measures 40.5 ft long and tips the scales at 10,300 lbs dry weight. The Keystone Impact 332 comes in at 36.5 ft with a dry weight of 13,800 lbs. That gives the Keystone Montana 3791RD roughly 4.0 extra feet of length.

The Keystone Montana 3791RD sleeps 10 while the Keystone Impact 332 accommodates 6. Slide-outs play a role in livability: the Keystone Montana 3791RD has 1 and the Keystone Impact 332 has 3.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Keystone Impact 332 at 81 gallons versus 68 gallons. Solar-wise, you get 550W on the Keystone Montana 3791RD and 350W on the Keystone Impact 332. Battery banks are 300 Ah and 150 Ah.

At $72,000 MSRP for the Keystone Montana 3791RD and $72,000 for the Keystone Impact 332, the Keystone Impact 332 saves you $0. With only a 0% price difference, the choice comes down to features rather than cost.

If you're traveling with a family, look for the model with more sleeping positions and better storage. Boondockers: look at the fresh water capacity and solar/battery systems — they determine how long you can stay out. For the full-time RV lifestyle, every gallon of tank capacity and every inch of counter space counts.

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