2024 Grand Design Momentum 399TH vs 2025 Heartland Cyclone 4005

The 2024 Grand Design Momentum 399TH and 2025 Heartland Cyclone 4005 represent two compelling choices for RV enthusiasts. Let's break down what sets them apart.

Specifications Comparison

Specification2024 Grand Design Momentum 399TH2025 Heartland Cyclone 4005Advantage
CategoryToy HaulerToy Hauler
Year202420252025 Heartland Cyclone 4005
Length28 ft26 ft
Width8 ft8 ft
Height12.5 ft13 ft
Dry Weight8,300 lbs13,000 lbs
GVWR11,900 lbs16,900 lbs
Sleeping Capacity9102025 Heartland Cyclone 4005
Fresh Water68 gal52 gal2024 Grand Design Momentum 399TH
Gray Water70 gal70 galTie
Black Water50 gal47 gal2024 Grand Design Momentum 399TH
Fuel Capacity48 gal59 gal2025 Heartland Cyclone 4005
Horsepower
Engine
Slide-Outs01
Solar200 W150 W2024 Grand Design Momentum 399TH
Battery150 Ah150 AhTie
Inverter2,500 W2,000 W2024 Grand Design Momentum 399TH
MSRP$61,000$56,0002025 Heartland Cyclone 4005

Detailed Comparison

The 2024 Grand Design Momentum 399TH and 2025 Heartland Cyclone 4005 represent two compelling choices for RV enthusiasts. Let's break down what sets them apart.

Starting with size, the Grand Design Momentum 399TH measures 28.0 ft long and tips the scales at 8,300 lbs dry weight. The Heartland Cyclone 4005 comes in at 26.0 ft with a dry weight of 13,000 lbs.

Capacity-wise, expect to sleep 9 in the Grand Design Momentum 399TH versus 10 in the Heartland Cyclone 4005. With 0 and 1 slide-outs respectively, the parked floor plans differ significantly.

Tank capacities are a key off-grid consideration. The Grand Design Momentum 399TH carries 68 gal of fresh water, 70 gal gray, and 50 gal black. The Heartland Cyclone 4005 offers 52 gal fresh, 70 gal gray, and 47 gal black. The Grand Design Momentum 399TH has the edge for extended dry camping.

Budget-wise, the Heartland Cyclone 4005 is listed at $56,000 compared to $61,000 for the Grand Design Momentum 399TH.

For family camping trips, the larger floor plan and additional berths make a real difference. For boondocking, the model with superior solar and battery setup will keep you comfortable off the grid longer.

Ultimately, both rigs have their merits — test drive each one and see which floor plan speaks to your lifestyle.

Individual Overviews

2024 Grand Design Momentum 399TH

  • Category: Toy Hauler
  • Length: 28 ft
  • Weight: 8,300 lbs
  • Sleeps: 9
  • MSRP: $61,000
View Full Specs

2025 Heartland Cyclone 4005

  • Category: Toy Hauler
  • Length: 26 ft
  • Weight: 13,000 lbs
  • Sleeps: 10
  • MSRP: $56,000
View Full Specs