Fleetwood Altitude 27U vs Winnebago Spirit 25B
2027 Class C comparison · side-by-side specs, verdict, and who each is best for.
Quick verdict
Both Class C motorhomes ride the Ford E450 with 14,500 lb GVWR, but they cover different model years and buyer profiles. The 2027 Fleetwood Altitude 27U measures 29.5 ft, 102 in wide, with the 7.3L V8 (325 HP), single slide, queen bed, onboard 4,000-watt generator, 50-amp shore service, 50/36/36 gal tanks, 16 gal LP, outdoor kitchen, residential fridge, fireplace, U-shape dinette, and automatic leveling. Sleeps 4. MSRP $151,232.
The 2026 Winnebago Spirit 25B runs 26.33 ft with the 350 HP V8, no slides, queen bed plus bunkhouse, 40/26/21 gal tanks, 18 gal LP, full bath, generator prep, solar prep, 30-amp service, and sleeps 6. MSRP $153,197, $1,965 above the Altitude.
Directionally, the 2027 Fleetwood Altitude 27U is the newer-decor slide-out couples Class C with included generator and 50-amp service, while the 2026 Winnebago Spirit 25B is the shorter bunkhouse family Class C with the 350 HP V8.
Side-by-side specs
| Fleetwood Altitude 27U | Winnebago Spirit 25B | |
|---|---|---|
| MSRP | $151,232 | $153,197 |
| Length | 29'6" | 26'4" |
| Dry weight | — | — |
| GVWR | 14,500 lbs | 14,500 lbs |
| Sleeps | 4 | 6 |
| Slides | 1 | 0 |
| Fresh tank | 50 gal | 40 gal |
| Grey tank | 36 gal | 26 gal |
| Black tank | 36 gal | 21 gal |
| LP | 16 gal | 18 gal |
| Solar | — | — |
| Inverter | — | — |
| Generator | 4000W | — |
| Bath | — | full |
| Bed | queen | queen |
| 4-season | No | No |
| Off-road | No | No |
| Outdoor kitchen | Yes | No |
| Washer/dryer | none | none |
| Residential fridge | Yes | No |
Where Fleetwood Altitude 27U wins
- 2027 model year with refreshed decor and graphics
- Single slide opens roughly 12 sq ft of additional interior
- Onboard 4,000-watt generator installed from factory
- 50-amp shore service vs 30-amp doubles available campground power
- Outdoor kitchen, residential refrigerator, and fireplace standard
Where Winnebago Spirit 25B wins
- Sleeps 6 vs 4 with cabover bunkhouse layout
- 350 HP version of the 7.3L V8 vs 325 HP
- 26.33 ft length is 3.2 ft shorter for tighter campsites
- Solar prep included for owner-spec install
- Full bath layout documented in spec sheet
Pick the Fleetwood Altitude 27U if…
Pick the 2027 Fleetwood Altitude 27U if you want the newest model year, slide-out interior space, included 4,000-watt generator, 50-amp service, outdoor kitchen, residential refrigerator, fireplace, and automatic leveling all standard. The 102 in width adds shoulder room, the 50/36/36 gal tanks support extended dry-camping, and the 2027 model year refresh updates cabinet finishes and decor. Trade-off: 10 HP less than the Spirit 25B's engine and the 29.5 ft length is 3.2 ft longer.
Pick the Winnebago Spirit 25B if…
Pick the 2026 Winnebago Spirit 25B if you have a family of 5-6 needing the cabover bunkhouse, want the 350 HP V8 for mountain pulling, and value the shorter 26.33 ft footprint for tighter campgrounds. The 30-amp service and prep-only generator and solar mean aftermarket additions, but the bunkhouse capacity and engine power justify the $1,965 premium for many family buyers over the Altitude 27U.
Frequently asked
Model year mix here?
The Altitude is the 2027 model with updated decor; the Spirit 25B is the 2026 model. Both ride essentially the same Ford E-450 chassis platform.
Slide vs cabover for family sleeping?
The Altitude 27U slide adds floor space but no extra sleep spots. The Spirit 25B sleeps 6 via cabover bunk plus convertible dinette and sofa.
Engine power note?
Both use the Ford 7.3L V8. The Altitude 27U rates it at 325 HP; the Spirit 25B at 350 HP. The 25 HP gap matters for steep grades and heavy cargo.