2024 Grand Design Solitude 375RES vs 2024 Forest River Cardinal 390FLX

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2024 Grand Design Solitude 375RES and the 2024 Forest River Cardinal 390FLX. Let's see how they compare across the specs that matter most.

Starting with size, the Grand Design Solitude 375RES measures 31.5 ft long and tips the scales at 14,700 lbs dry weight. The Forest River Cardinal 390FLX comes in at 39.0 ft with a dry weight of 10,200 lbs. That gives the Forest River Cardinal 390FLX roughly 7.5 extra feet of length.

The Grand Design Solitude 375RES sleeps 7 while the Forest River Cardinal 390FLX accommodates 8. Slide-outs play a role in livability: the Grand Design Solitude 375RES has 4 and the Forest River Cardinal 390FLX has 4.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Grand Design Solitude 375RES at 71 gallons versus 66 gallons. Solar-wise, you get 550W on the Grand Design Solitude 375RES and 350W on the Forest River Cardinal 390FLX. Battery banks are 250 Ah and 400 Ah.

At $143,000 MSRP for the Grand Design Solitude 375RES and $142,000 for the Forest River Cardinal 390FLX, the Forest River Cardinal 390FLX saves you $1,000. With only a 1% 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.

The numbers tell one story, but the feel of a floor plan is personal. Schedule a walkthrough before you decide.