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2027 Airstream Interstate 19X vs Roadtrek Wave

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Key differences

Both are 2027 Class B models. Here's how they differ, from manufacturer specifications.

  • The Roadtrek Wave is 8″ longer: 20′ 9″ vs 20′ 1″.
  • The Airstream Interstate 19X is 123 lb lighter unloaded: 7,595 vs 7,718 lb.
  • The Roadtrek Wave has a 300 lb higher GVWR: 9,350 vs 9,050 lb.
  • The Roadtrek Wave lists 719 lb more cargo capacity: 2,174 vs 1,455 lb.
  • The Roadtrek Wave sleeps 2 more: 4 vs 2.
  • The Roadtrek Wave holds 18 gal more fresh water: 38 vs 20 gal.
  • The Roadtrek Wave has a $84,012 lower published MSRP: $156,888 vs $240,900.
YOUR SHORTLIST
Airstream Interstate

19X

2027 · Class B · Diesel

Specs & prices
Roadtrek

Wave

2027 · Class B · Gas

Specs & prices
Floorplan
PRICING
Manufacturer price (USD)
$240,900Manufacturer starting priceChecked 2026-10-27 · Price source
$156,888Manufacturer starting priceChecked 2026-10-27 · Price source
Lowest tracked dealer price (USD)
No recently verified dealer price
No recently verified dealer price
Est. monthly payment (USD)
$1,949/mo20 years at 8.99% APR with 10% down, based on the MSRP. Before tax and fees.Customize this payment
$1,269/mo20 years at 8.99% APR with 10% down, based on the MSRP. Before tax and fees.Customize this payment
MOTORHOME
Engine fuel type
Diesel
Gas
Chassis
Mercedes-Benz® Sprinter 2500; published drivetrain: AWD
2026 RAM Promaster 3500 159” EXT Van w/3.6L V6 – 9 spd transmission
Engine
Mercedes-Benz® 2.0 L Turbo Charged 4-Cylinder High Output Diesel
3.6L gas V6,24-valve; manufacturer lists280HP and automatic9-speed
GCWR
13,930 lb
—
Published towing / receiver rating
5,000 lb
3,500 lb
Fuel tank capacity
25 gal
24 gal
DIMENSIONS & WEIGHTS
Exterior length
20′ 1″
20′ 9.02″
Exterior width
7′ 8.5″
6′ 10.99″
Exterior height
9′ 11″
9′ 4.99″
Shipping / unloaded weight
7,595 lb
7,718 lb
GVWR
9,050 lb
9,350 lb
Listed cargo capacity
1,455 lb
2,174 lb
Listed hitch weight
—
—
LIVING & SLEEPING
Sleeping capacity
2
4
Slide-outs
—
—
Main bed
71 in x 74 or 35 in x 74 Individual Sleeping Area (Flex Bed System)
Rear king/convertible sleeping: 71.0 × 69.0 in; manufacturer 1803.4 × 1752 mm
Bunk beds
Not verified
Not verified
Dinette
Colorado Black Ultraleather with Mountain Peak Insets (front seats); Simtex Marine-Grade Carbon Gray (rear seating/sleeping)
Not verified
Bathroom
Space-Saving Wet Bath; Plastic Toilet with Foot Flush
Wet bath with cassette toilet, sink and shower
Refrigerator
3.2 cu ft with Stainless Insert (12 V)
12V 3.2cuft compressor
TANKS & EVERYDAY FEATURES
Fresh water
20 gal
38 gal
Gray water
16 gal
Conflicting data
Black water
9 gal
5 gal
Awning length
10′ 0″
13′ 0″
Shore power / electrical service
30 amp standard
30 amp standard external power connection
Solar equipment
240 W Solar System
300 W
Outdoor kitchen
Not verified
Not verified
Washer/dryer prep
Not verified
Not verified
Microwave
✓ Yes
✓ Yes
Cooktop
1,000 W Single Burner Induction Cooktop (Stowable)
Two-burner propane standard; induction optional
Air conditioning
13,500 BTU with Soft Start
Truma Aventa Eco Roof Mount Air Conditioning, 13,500 BTU
Electric fireplace
Not verified
Not verified
Backup camera
Not verified
Not verified
Propane tanks
—
—
Tire size
Not verified
Not verified
SOURCES & VERIFICATION
Weight basis
Manufacturer unit base weight; configuration-dependent values unverified
Manufacturer dry weight where published; OCCC includes occupants
Source checked
2026-10-27 Manufacturer ↗
2026-10-27 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.

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