2024 Grand Design Momentum 399TH vs 2024 Grand Design Momentum G-Class 21G

Detailed Comparison

Looking at the 2024 Grand Design Momentum 399TH alongside the 2024 Grand Design Momentum G-Class 21G? Smart move — comparing specs before you buy is the best way to ensure satisfaction.

The Grand Design Momentum 399TH measures 28.0 ft in length at 8,300 lbs, compared to the Grand Design Momentum G-Class 21G's 44.0 ft and 10,500 lbs. GVWR ratings sit at 11,900 lbs and 13,300 lbs respectively.

For sleeping arrangements, the Grand Design Momentum 399TH offers room for 9 and the Grand Design Momentum G-Class 21G can handle 9. The Grand Design Momentum G-Class 21G benefits from 3 slide-out(s), expanding the interior when parked.

Looking at self-sufficiency, the Grand Design Momentum 399TH packs 68 gal of fresh water and 200W of solar. The Grand Design Momentum G-Class 21G counters with 56 gal fresh water and 300W solar.

Price is often the deciding factor. The Grand Design Momentum 399TH starts at $61,000 MSRP, while the Grand Design Momentum G-Class 21G commands $77,000 — a $16,000 gap. That's a significant 26% premium you'll need to justify.

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.

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