2025 Grand Design Momentum M-Class 350M vs 2025 Heartland Fuel 287

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2025 Grand Design Momentum M-Class 350M and the 2025 Heartland Fuel 287. Let's see how they compare across the specs that matter most.

The Grand Design Momentum M-Class 350M measures 42.0 ft in length at 10,500 lbs, compared to the Heartland Fuel 287's 30.0 ft and 13,800 lbs. GVWR ratings sit at 15,100 lbs and 18,200 lbs respectively.

The Grand Design Momentum M-Class 350M sleeps 9 while the Heartland Fuel 287 accommodates 10. Slide-outs play a role in livability: the Grand Design Momentum M-Class 350M has 3 and the Heartland Fuel 287 has 3.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Grand Design Momentum M-Class 350M at 78 gallons versus 68 gallons. Solar-wise, you get 350W on the Grand Design Momentum M-Class 350M and 200W on the Heartland Fuel 287. Battery banks are 200 Ah and 100 Ah.

At $81,000 MSRP for the Grand Design Momentum M-Class 350M and $82,000 for the Heartland Fuel 287, the Grand Design Momentum M-Class 350M 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.

No comparison can replace walking through each unit yourself. Visit a dealer and experience the layouts firsthand.