01 What makes it unique
The 321BH is the top of the Delta line: a ‘BH’ bunkhouse with dual bunks, opening on two slide-outs in a 36-foot-11 body and sleeping seven — the largest, heaviest and most family-focused Delta. It is the plan for a bigger family that wants maximum sleeping and living space while staying a bumper-pull travel trailer rather than moving up to a fifth wheel, on a GVWR that sits at the top edge of half-ton-plus towing.
Every Delta rides a bumper-pull tandem-axle chassis with a walk-on seamless PVC roof, a double-insulated front wall, a heated and enclosed underbelly, 62 cubic feet of drop-frame pass-through storage, Goodyear Endurance tires with Counteract beads on aluminum rims with a spare, a MorRyde Step Above entry, electric auto-leveling, a 10-cubic-foot 12-volt refrigerator, a 400-watt solar package with a 30-amp MPPT controller, two air conditioners and two awnings. Alliance publishes a 10,450-pound GVWR against the 8,330-pound dry weight — the heaviest in the line — leaving a 2,120-pound cargo capacity and an 885-pound tongue, with a 45-gallon fresh tank and a 90-gallon grey tank. At a starting MSRP around $69,000, the priciest Delta with street pricing below placard, the 321BH is the flagship family Delta for buyers who want the most space and sleeping the line offers in a bumper-pull travel trailer, towed with a well-rated half-ton or a three-quarter-ton truck.
02 Full specifications
Dimensions
- Exterior length
- 36' 11"
- Exterior height
- 11' 3"
- Exterior width
- Not published by source
Weights
- Dry / unit base weight (UVW)
- 8,330 lbs
- GVWR (max loaded)
- 10,450 lbs
- Net cargo / payload (CCC)
- 2,120 lbs
- Dry tongue (hitch) weight
- 885 lbs
Capacities
- Fresh water
- 45 gal
- Grey water
- 90 gal
- Black water
- 45 gal
- Refrigerator
- 10 cu ft 12V
Construction
- Roof
- Walk-on seamless PVC covering
- Front wall
- Double-insulated
- Underbelly
- Heated & enclosed · 12V tank heaters
- Storage
- 62 cu ft drop-frame pass-through
Running gear
- Axles
- 2 (tandem)
- Hitch
- Bumper Pull (weight-distribution recommended)
- Tires
- Goodyear Endurance · Counteract beads · aluminum rims + spare
- Entry
- MorRyde Step Above with grab handle
- Leveling
- Electric auto-leveling
Galley & systems
- Refrigerator
- 10 cu ft 12-volt
- A/C
- 2 units
- Solar / electrical
- OTG 400W · 30A MPPT · 3,000W inverter prep
- Service
- 50-amp with detachable cord
Sleeping & layout
- Sleeps
- 7
- Slides
- 2
- Entries
- 1
- Awnings
- 2
03 The Delta floorplan family
Delta is Alliance RV's travel-trailer line — half-ton-friendly bumper-pull towables and a cross-shop against Grand Design's Imagine, Jayco's Jay Flight SLX, Forest River's Salem / Wildwood and Keystone's Passport. Seven floorplans are profiled in full and linked below; the remaining plans, including the new single-axle Delta Solo sub-line, are catalogued and shown muted. The 321BH on this page is highlighted.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| ML166 | 19 ft | 3 | Delta Solo — weights not yet published |
| RB152 | 19 ft | 3 | Delta Solo rear bath (new 2026) |
| BH181 | 22 ft | 5 | Delta Solo entry bunkhouse (new 2026) |
| ML206 | 23 ft | 2 | Compact couples plan, lightest main Delta |
| ML226 | 26 ft | 3 | Compact plan (lighter half-ton) |
| RK234 | 27 ft | 3 | Rear kitchen (lighter half-ton) |
| 262RB | 29 ft | 3 | Rear bath, single slide |
| 252RL | 29 ft | 3 | Rear living |
| BH241 | 29 ft | 6 | Bunkhouse (lighter half-ton) |
| BH271 | 29 ft | 4 | Bunkhouse (lighter half-ton) |
| RE250 | 29 ft | 3 | Rear entertainment (lighter half-ton) |
| 274RKW | 31 ft | 3 | Rear kitchen |
| 281BH | 31 ft | 7 | Bunkhouse, dual entry, sleeps seven |
| 284RK | 32 ft | 4 | Rear kitchen |
| 292RL | 33 ft | 3 | Rear living, two slides |
| 294RK | 33 ft | 4 | Rear kitchen, two slides |
| 291BH | 34 ft | 7 | Bunkhouse |
| 321BH | 36 ft | 7 | Flagship bunkhouse, biggest, sleeps seven |
Delta is Alliance RV's travel-trailer line — the maker's move into lighter, half-ton-friendly bumper-pull towables, launched in July 2023, alongside a lighter Delta Ultra Lite and a new-for-2026 single-axle Delta Solo sub-line. The 2026 range runs to fifteen plans filed by RVUSA as Delta plus the Solo plans; seven floorplans are profiled here in full and the remaining plans are catalogued from published specifications below. Every Delta rides a bumper-pull tandem-axle chassis with a walk-on seamless PVC roof, a double-insulated front wall, a heated and enclosed underbelly with 12-volt tank heaters, 62 cubic feet of drop-frame pass-through storage, Goodyear Endurance tires with Counteract balancing beads on aluminum rims with a spare, a MorRyde Step Above entry, electric auto-leveling, a 10-cubic-foot 12-volt refrigerator and a 400-watt solar package with a 30-amp MPPT controller and 3,000-watt inverter prep on 50-amp service. Tongue weight, GVWR, dry weight and CCC are published per plan and each plan's dry weight plus CCC equals its GVWR exactly. Dry weight is a factory estimate; real loaded tongue weights run higher — always weigh the loaded trailer and confirm against your vehicle's tow rating and payload.
04 What owners & reviewers report
Flagship dual-bunk bunkhouse
The biggest Delta — dual bunks, two slides, sleeping seven — maximum family space in a bumper-pull trailer.
Heaviest, priciest Delta
At 8,330 pounds dry and a 10,450-pound GVWR it is the heaviest plan in the line, at the top of the price range.
Top-edge half-ton tow
A 10,450-pound GVWR and 885-pound tongue sit at the upper limit of half-ton-plus towing — a well-rated half-ton or a three-quarter-ton is the honest match.
Verify the tow vehicle honestly
Confirm your truck’s tow rating, payload and hitch class against the loaded weight, not the brochure figure — this is the heaviest Delta.
05 How it compares
Grand Design’s Imagine — the direct large-family travel-trailer cross-shop.
Forest River’s Salem and Wildwood — comparable big bunkhouse travel trailers.
Alliance’s entry fifth wheel — a mid-profile 5W bunkhouse for families ready to move from a travel trailer to a fifth wheel.