2025 Grand Design Momentum M-Class 350M vs 2024 Keystone Raptor 351

Detailed Comparison

Head to head, the 2025 Grand Design Momentum M-Class 350M and the 2024 Keystone Raptor 351 each bring unique strengths to the table. Which one deserves a spot in your driveway?

In terms of footprint, the Grand Design Momentum M-Class 350M stretches 42.0 ft while the Keystone Raptor 351 spans 30.0 ft. Weight-wise, the Keystone Raptor 351 is the lighter rig at 7,800 lbs versus 10,500 lbs.

For sleeping arrangements, the Grand Design Momentum M-Class 350M offers room for 9 and the Keystone Raptor 351 can handle 4.

Looking at self-sufficiency, the Grand Design Momentum M-Class 350M packs 78 gal of fresh water and 350W of solar. The Keystone Raptor 351 counters with 51 gal fresh water and 250W solar.

Price is often the deciding factor. The Grand Design Momentum M-Class 350M starts at $81,000 MSRP, while the Keystone Raptor 351 commands $82,000 — 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.

At the end of the day, the best RV is the one that fits your travel dreams and budget. Either of these is a worthy choice.