Compare Mowers
List prices are the manufacturer’s published figures, re-checked daily; they exclude tax, freight and dealer setup.
A side-by-side reference of each model's stated specifications. MowerFacts doesn’t give opinions: where a published, spec-derived rule can separate machines we mark a Data Pick and show the rule; here, read the values and decide what fits your needs.
Best suited for
What each model is built for, from its duty class and key specs. This is a neutral reference — MowerFacts does not rank one model above another.
- Gravely Z-STANCE 48 KAWASAKI — commercial: daily paid use and high acreage; 48-inch deck; gas powered
- Altoz XR 480 / 540 / 540 SS — commercial: daily paid use and high acreage; 48-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Z-STANCE 48 KAWASAKI has a 10 ga deck; XR 480 / 540 / 540 SS has a Fabricated Steel deck.
- Z-STANCE 48 KAWASAKI cuts from 1.5 in (38 mm) to 5 in (127 mm); XR 480 / 540 / 540 SS cuts from 1.5 in (38 mm) to 4.3 in (108 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
- Z-STANCE 48 KAWASAKI has a published top speed of 7 mph; XR 480 / 540 / 540 SS has a published top speed of 8 mph, a 1 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- Z-STANCE 48 KAWASAKI holds 4.5 gal (17 L) of fuel; XR 480 / 540 / 540 SS holds 5 gal (18.9 L) of fuel, a 0.5 gal difference. Tank size bounds how long a machine runs between stops. Consumption varies with engine, load and speed, so hours per tank are not fixed.
- Z-STANCE 48 KAWASAKI weighs 744 lbs (337.5 kg); XR 480 / 540 / 540 SS weighs 800 lbs (362.9 kg), a 56 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Z-STANCE 48 KAWASAKI's weight means for a trailer ›
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- Z-STANCE 48 KAWASAKI has a 22 hp engine; XR 480 / 540 / 540 SS has a 23 hp engine, a 1 hp difference.
Calculated by MowerFacts
- Z-STANCE 48 KAWASAKI works out to 2.7 acres/hour; XR 480 / 540 / 540 SS works out to 3.1 acres/hour, a 0.4 acres/hour difference. Calculated by MowerFacts from deck width and the published top speed at 80% efficiency; it is not a manufacturer figure, and real mowing is slower.
Not comparable
- Warranty: not published for Z-STANCE 48 KAWASAKI.
- Blades: not published for Z-STANCE 48 KAWASAKI.
- Transmission: not published for Z-STANCE 48 KAWASAKI.
- Deck Construction: not published for XR 480 / 540 / 540 SS.
- Drive System: not published for XR 480 / 540 / 540 SS.
- Discharge: not published for XR 480 / 540 / 540 SS.
- Price: XR 480 / 540 / 540 SS is dealer quote only.
Verified means each manufacturer publishes the figure. A bigger number is only a bigger number; nothing here says which machine is better. The full specification table is below.
Which is faster on your property? › Measure your lawn once and MowerFacts times all 2 against it.
| Spec | Z-STANCE 48 KAWASAKI Gravely · Commercial |
XR 480 / 540 / 540 SS Altoz · Commercial |
|---|---|---|
| List price | $8,199 | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki® | Kawasaki |
| Displacement | 44.3 ci (725.9 cc) | 44.3 ci (726 cc) |
| Engine Power | 22 hp | 23 hp |
| Cylinders | — | 2 |
| Engine Model | FS651V | FR |
| Fuel Type | Gas | Gasoline |
| Deck | ||
| Cutting Width | 48 in (1219 mm) | 48 in (1219 mm) |
| Blades | — | 3 |
| Deck Material | 10 ga | Fabricated Steel |
| Deck Construction | Fabricated X-Factor® 3 | — |
| Deck Gauge | 10 | — |
| Anti-Scalp Rollers | — | Yes |
| Min Cut Height | 1.5 in (38 mm) | 1.5 in (38 mm) |
| Blade Tip Speed | — | 18501 ft/min (5639 m/min) |
| Discharge | Side | — |
| Max Cut Height | 5 in (127 mm) | 4.3 in (108 mm) |
| Drive | ||
| Transmission | — | Hydrostatic |
| Ground Speed | 7 mph | 8 mph |
| Drive Tire Size | — | 20" |
| Reverse Speed | 3 mph | — |
| Drive System | Hydro-Gear® ZT-3100® Transaxles | — |
| Dimensions | ||
| Weight | 744 lbs (337.5 kg) | 800 lbs (362.9 kg) |
| Fuel Capacity | 4.5 gal (17 L) | 5 gal (18.9 L) |
| Length | — | 80 in (2032 mm) |
| Height | — | 49 in (1245 mm) |
| General | ||
| Warranty | — | 3 yr |
Where these models differ, explained
Z-STANCE 48 KAWASAKI: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — gravely.com.
XR 480 / 540 / 540 SS: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.