Fleetwood Palisade 45CS vs Newmar Supreme Aire 4129
2027 Class A comparison · side-by-side specs, verdict, and who each is best for.
Quick verdict
Two flagship Class A diesel coaches near $700K with sharply different engineering philosophies. The Fleetwood Palisade 45CS is a 44.7-ft three-slide on the Freightliner XCM Freedom Bridge chassis with a Cummins L9 450 HP, 46,000-lb GVWR, six 6V AGM batteries, 100-gal fresh, and a 10 kW Onan diesel generator. The Newmar Supreme Aire 4129 is a 41.9-ft four-slide on the Freightliner Cascadia 116 with the bigger Detroit Diesel DD13 525 HP, 800Ah lithium bank, 150-gal fresh, and a 12.5 kW generator, all at a slightly lower 41,000-lb GVWR.
The Newmar Supreme Aire 4129 wins on raw power (525 vs 450 HP), bank size (800Ah lithium vs six AGM 6V), fresh water (150 vs 100 gal), and adds true four-season construction, lifting it above the Fleetwood Palisade 45CS on dry-camping endurance. The Fleetwood Palisade 45CS counters with a 5,000-lb higher GVWR (46,000 vs 41,000), a longer wheelbase footprint at 44.7 ft, theater seating standard, and a $3,996 lower sticker ($706,848 vs $702,852 - actually a $3,996 wedge in the Newmar's favor on price, but the Fleetwood includes generator prep at higher kW capacity).
Buyers who weigh tonnage and brand heritage lean Fleetwood; buyers who weigh modern lithium, four-season, and 525 HP shove lean Newmar Supreme Aire.
Side-by-side specs
| Fleetwood Palisade 45CS | 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 | 4 | 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 45CS wins
- 46,000-lb GVWR vs 41,000-lb on the Newmar - 5,000 lbs more headroom
- Longer 44.7-ft floor plan adds usable interior space
- Theater seating standard (Newmar matches)
- Six 6V AGM batteries with built-in 2,800W inverter
- Hand-laid tile showers and Aqua-Hot 450D extended-stay water
Where Newmar Supreme Aire 4129 wins
- 525 HP Detroit DD13 vs 450 HP Cummins L9 - 75 more horsepower
- 800Ah lithium standard vs AGM 6V bank
- 150-gal fresh tank vs 100 gal on the Palisade
- 12,500W generator vs 10,000W on the Fleetwood
- Four-slide layout in 41.9 ft and four-season construction
Pick the Fleetwood Palisade 45CS if…
Pick the Fleetwood Palisade 45CS if you want the most coach for the dollar with proven Cummins L9 power and the brand's hand-laid tile and Apex Custom Furniture treatments. The 46,000-lb GVWR is the highest in the segment near this price, letting you load full water, full diesel, a tow car, and a full basement without burning into reserve. The XCM Freedom Bridge chassis pairs with a 2,800W inverter and Onan 10 kW genset for full off-grid hotel loads. This is the choice for owners who plan to keep a coach 10+ years and want flagship-tier finish.
Pick the Newmar Supreme Aire 4129 if…
Pick the Newmar Supreme Aire 4129 if you want modern lithium electrical architecture and the most engine you can buy in this class. The Detroit DD13 525 HP/1,650 lb-ft pulls grades 75 HP harder than the Cummins L9, the 800Ah lithium bank with no LP system simplifies maintenance, and the Cascadia 116 chassis brings air ride and OTR-grade brakes. Four-season construction extends shoulder-season camping into the Rockies in October. At $702,852 it is also $3,996 cheaper than the Palisade 45CS.
Frequently asked
Which has more horsepower, the Palisade 45CS or Supreme Aire 4129?
The Newmar Supreme Aire 4129 with the Detroit Diesel DD13 525 HP outpowers the Fleetwood Palisade 45CS Cummins L9 by 75 HP.
How much fresh water does each carry?
The Newmar Supreme Aire 4129 holds 150 gallons of fresh water versus 100 gallons in the Fleetwood Palisade 45CS - a 50% advantage for the Newmar.
Is the Supreme Aire 4129 lithium standard?
Yes - the Newmar Supreme Aire 4129 ships with an 800Ah lithium house bank standard. The Fleetwood Palisade 45CS uses six 6V AGM batteries instead.