RV SortRV comparison, made clearFree to compare. No sign-up.

2027 Forest River Riverstone 420RE vs Keystone Montana 3900RK

Search 2,283 floorplans from 23 manufacturers, then put your favorites side by side.

Filter by length, weight and features

2027 Grand Design Reflection 317RSTS floorplanGrand Design Reflection 317RSTSTravel trailer, 35′ 5″2027 Keystone Montana High Country 290RL floorplanKeystone Montana High Country 290RLFifth wheel, 33′ 11″2027 Grand Design Momentum 344M floorplanGrand Design Momentum 344MFifth-wheel toy hauler, 39′ 11″

Your comparison 2 RVs

Saved on this device

Key differences

Both are 2027 Fifth wheel models. Here's how they differ, from manufacturer specifications.

  • The Forest River Riverstone 420RE is 1′ 5″ longer: 45′ 3″ vs 43′ 10″.
  • The Keystone Montana 3900RK is 1,286 lb lighter unloaded: 17,085 vs 18,371 lb.
  • The Forest River Riverstone 420RE lists 3,309 lb more cargo capacity: 5,629 vs 2,320 lb.
  • The Forest River Riverstone 420RE has a 155 lb lighter hitch weight: 3,250 vs 3,405 lb.
YOUR SHORTLIST
Forest River Riverstone

420RE

2027 · Fifth wheel

Specs & prices
Keystone Montana

3900RK

2027 · Fifth wheel

Specs & prices
Floorplan
PRICING
Manufacturer price (USD)
Not verified
$175,847Published MSRPChecked 2026-10-22 · Price source
Lowest tracked dealer price (USD)
$163,936Bish’s RV ↗ · Anderson, INAdvertised price; additional fees may applyChecked Lowest among tracked new units; equipment varies. Not an out-the-door quote. Financing, rebates and fees may apply.
Price conditionsAdvertised price, not an out-the-door quote. Taxes, registration, delivery and other fees may apply. Financing, trade-in and rebate eligibility have not been independently verified; confirm all conditions with the dealer. Equipment varies by unit.
All tracked prices & history
$129,995General RV ↗ · North Canton, OHAdvertised price; additional fees may applyChecked Lowest among tracked new units; equipment varies. Not an out-the-door quote. Financing, rebates and fees may apply.
Price conditionsAdvertised price, not an out-the-door quote. Taxes, registration, delivery and other fees may apply. Financing, trade-in and rebate eligibility have not been independently verified; confirm all conditions with the dealer. Equipment varies by unit.
All tracked prices & history
Est. monthly payment (USD)
$1,327/mo20 years at 8.99% APR with 10% down, based on the lowest dealer price. Before tax and fees.Customize this payment
$1,052/mo20 years at 8.99% APR with 10% down, based on the lowest dealer price. Before tax and fees.Customize this payment
DIMENSIONS & WEIGHTS
Exterior length
45′ 3″
43′ 10″
Exterior width
8′ 6″
—
Exterior height
13′ 6″
13′ 4″
Shipping / unloaded weight
18,371 lb
17,085 lb
GVWR
24,000 lb
—
Listed cargo capacity
5,629 lb
2,320 lb
Listed hitch weight
3,250 lb
3,405 lb
LIVING & SLEEPING
Sleeping capacity
—
6
Slide-outs
5
—
Main bed
Not verified
King size bed
Bunk beds
Not verified
No
Dinette
Not verified
Not verified
Bathroom
Not verified
Not verified
Refrigerator
Not verified
20 Cu. Ft. 12V refrigerator
TANKS & EVERYDAY FEATURES
Fresh water
79 gal
77 gal
Gray water
100 gal
150 gal
Black water
50 gal
100 gal
Awning length
20′ 0″ & 11′ 6″
—
Shore power / electrical service
Not verified
50 amp power cord listed; service not verified
Solar equipment
Not verified
SolarFlex™ Protect 220
Outdoor kitchen
Not verified
No
Washer/dryer prep
Not verified
✓ Yes
Microwave
Not verified
✓ Yes
Cooktop
Not verified
24" Furrion freestanding 4-burner range with 3.7 Cu Ft Oven
Air conditioning
Not verified
18K Furrion Chill Cube Main A/C with heat pump; 13.5 K Furrion AC for 2nd and 3rd ACs
Electric fireplace
Not verified
✓ Yes
Backup camera
Not verified
Not verified
Propane tanks
—
2
Tire size
Not verified
215/75R17.5H
SOURCES & VERIFICATION
Weight basis
Manufacturer unloaded vehicle weight
Manufacturer shipping weight
Source checked
2026-10-22 Manufacturer ↗
2026-10-22 Manufacturer ↗

Manufacturer floorplan images © their respective manufacturers. Specs checked October 19, 2026; exact-unit labels and production options may differ. “Not verified” or a dash means we have no confirmed value. “Not listed” means the applicable manufacturer equipment was checked but does not mention the feature; it does not mean “No.” “Conflicting data” means manufacturer entries disagree. “Optional” equipment is available but is not confirmed as standard. Camera prep does not confirm an installed camera. Weights are kept separate: unloaded weight, GVWR, cargo capacity, and hitch weight. Confirm every specification for the exact model year and configuration with the manufacturer. This tool does not establish towing compatibility.

The right layout changes everything.

Compare the 2027 Coleman 13B vs 13R →

Compare the space you’ll live in, then dig into the details.
Click any floorplan for a closer look.

Make room for the details

Use the same model year and weight definitions when comparing. An unknown specification stays unknown.

Browse the RV catalog

Add an RV to compare

Search the catalog. Floorplans and specifications are filled in for you.

Model details
Your shortlist

Add your RV

Enter the specs for the exact model year. Leave anything you don’t know blank.

Floorplan

Floorplan images are shown to fit and are not to a shared physical scale.

Compare your shortlist

  1. Search by year, manufacturer or model. Select up to six RVs to automatically add their manufacturer floorplans and specifications.
  2. Click a floorplan to enlarge it. Turn on “differences only” to focus your comparison.
  3. Edit any RV as you research. The URL updates as you add, edit or remove RVs. Back and Forward restore earlier selections. Your entries stay in this browser.
  4. Copy the link to share specs (uploaded images and private notes stay on your device). Export a JSON backup to include images and notes, or use Print / PDF.

Browse the available 2027 models. We are expanding the catalog in manufacturer batches. Manual entry is available if your RV is not listed. Floorplans are displayed independently, not to scale.