2025 Grand Design Momentum G-Class 28G vs 2024 Grand Design Momentum G-Class 21G

Detailed Comparison

Before committing to the 2025 Grand Design Momentum G-Class 28G or the 2024 Grand Design Momentum G-Class 21G, it pays to understand exactly where each one shines and where it falls short.

In terms of footprint, the Grand Design Momentum G-Class 28G stretches 43.0 ft while the Grand Design Momentum G-Class 21G spans 44.0 ft. Weight-wise, the Grand Design Momentum G-Class 21G is the lighter rig at 10,500 lbs versus 12,000 lbs.

The Grand Design Momentum G-Class 28G sleeps 10 while the Grand Design Momentum G-Class 21G accommodates 9. Slide-outs play a role in livability: the Grand Design Momentum G-Class 28G has 0 and the Grand Design Momentum G-Class 21G has 3.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Grand Design Momentum G-Class 21G at 56 gallons versus 56 gallons. Solar-wise, you get 150W on the Grand Design Momentum G-Class 28G and 300W on the Grand Design Momentum G-Class 21G. Battery banks are 150 Ah and 200 Ah.

At $70,000 MSRP for the Grand Design Momentum G-Class 28G and $77,000 for the Grand Design Momentum G-Class 21G, the Grand Design Momentum G-Class 28G saves you $7,000. With only a 10% 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.

Both options have earned their place in the market. Your trip style and budget should be the final tiebreakers.