Fleetwood Palisade 45FS vs Newmar Supreme Aire 4129
2027 Class A comparison · side-by-side specs, verdict, and who each is best for.
Quick verdict
Two Class A diesel flagships, both near $700K, but with very different family use cases. The Fleetwood Palisade 45FS is a 44.7-ft three-slide bunkhouse coach on the Freightliner XCM Freedom Bridge, Cummins L9 450 HP, 46,000-lb GVWR, sleeps 6 with the bunk system, and asks $706,848. The Newmar Supreme Aire 4129 is a 41.9-ft four-slide non-bunk coach on the Cascadia 116 with a Detroit DD13 525 HP, 800Ah lithium, 150-gal fresh, four-season build, and 41,000-lb GVWR at $702,852.
The Palisade 45FS owns the bunkhouse use case - it is one of the only Class A diesels in this price bracket that ships factory bunks and sleeps a 6-person family. It also carries 5,000 lbs more on the chassis (46,000-lb GVWR) and adds a 2,800W inverter. The Newmar Supreme Aire 4129 counters with 75 more HP, the only lithium standard in this comparison, 50% more fresh water (150 vs 100 gal), a 12.5 kW genset, and four-season insulation - but no bunks.
Families with two adults and three kids buy the Palisade 45FS. Couples or two adults who want maximum power, lithium, and off-grid water capacity buy the Supreme Aire 4129.
Side-by-side specs
| Fleetwood Palisade 45FS | Newmar Supreme Aire 4129 | |
|---|---|---|
| MSRP | $706,848 | $702,852 |
| Length | 44'8" | 41'11" |
| Dry weight | — | 37,000 lbs |
| GVWR | 46,000 lbs | 41,000 lbs |
| Sleeps | 6 | 5 |
| Slides | 3 | 4 |
| Fresh tank | 100 gal | 150 gal |
| Grey tank | 75 gal | 85 gal |
| Black tank | 50 gal | 52 gal |
| LP | — | 0 gal |
| Solar | 100W | — |
| Inverter | 2800W | — |
| Generator | 10000W | 12500W |
| Bath | — | full |
| Bed | king | king |
| 4-season | No | Yes |
| Off-road | No | No |
| Outdoor kitchen | No | No |
| Washer/dryer | yes | prep |
| Residential fridge | Yes | Yes |
Where Fleetwood Palisade 45FS wins
- Bunkhouse floor plan - sleeps 6 standard (vs 5 in the Newmar)
- 46,000-lb GVWR vs 41,000 lbs
- 44.7-ft length, 102" wide vs 41.9 ft on Newmar
- 2,800W inverter standard
- Hand-laid tile showers and full-body paint
Where Newmar Supreme Aire 4129 wins
- Detroit DD13 525 HP vs Cummins L9 450 HP
- 800Ah lithium house bank standard
- 150-gal fresh tank vs 100 gal on the Palisade
- 12,500W generator vs 10,000W
- Four-season construction and four-slide layout
Pick the Fleetwood Palisade 45FS if…
Pick the Fleetwood Palisade 45FS if you have kids who need real beds rather than convertible setups. The 45FS is one of the only Class A diesels at any price that ships a true bunkhouse, sleeping six without making anyone fold out a dinette or sofa. The 46,000-lb GVWR carries the whole family, full water, full diesel, and a tow car with room for gear in the basement. Hand-laid tile and 450D Aqua-Hot deliver flagship finish. The Cummins L9 450 HP pulls grades adequately at this weight.
Pick the Newmar Supreme Aire 4129 if…
Pick the Newmar Supreme Aire 4129 if you don't need bunks and you want the most modern, most powerful coach near $700K. The Detroit DD13 525 HP is the biggest engine on the segment chart, the 800Ah lithium plus no-LP architecture is the cleanest hotel system available, and 150 gallons of fresh water plus four-season construction support genuine off-grid stays. The 12.5 kW genset handles dual rooftop AC plus induction at the same time. At $702,852 you spend $3,996 less than the Palisade 45FS.
Frequently asked
Which 2027 Class A includes a bunkhouse for kids?
The Fleetwood Palisade 45FS ships with a factory bunkhouse and sleeps 6. The Newmar Supreme Aire 4129 does not have bunks and sleeps 5.
Does the Supreme Aire 4129 use propane?
No - the Newmar Supreme Aire 4129 is an all-electric coach with 800Ah lithium and zero LP capacity. The Fleetwood Palisade 45FS retains a propane system.
Which carries more cargo on the chassis?
The Fleetwood Palisade 45FS has a 46,000-lb GVWR, 5,000 lbs higher than the Newmar Supreme Aire 4129's 41,000-lb GVWR.