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.
- Altoz XC 720 SSi — commercial: daily paid use and high acreage; 72-inch deck; gas powered
- Gravely PRO-STANCE ULTRA 72 FX1000 EFI — commercial: daily paid use and high acreage; 72-inch deck; gas powered
What’s different? The 4 differences that matter most, from the published figures.
- XC 720 SSi has a published top speed of 19 mph; PRO-STANCE ULTRA 72 FX1000 EFI has a published top speed of 12.5 mph, a 6.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- XC 720 SSi has a Fabricated Steel deck; PRO-STANCE ULTRA 72 FX1000 EFI has a 7 ga deck.
- XC 720 SSi has a 35 hp engine; PRO-STANCE ULTRA 72 FX1000 EFI has a 38.5 hp engine, a 3.5 hp difference. Published horsepower is the maker's rating at a stated engine speed. It is a different measure from displacement, and two engines of equal rating can pull differently.
- XC 720 SSi holds 14 gal (53 L) of fuel; PRO-STANCE ULTRA 72 FX1000 EFI holds 16 gal (60.6 L) of fuel, a 2 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.
calculated figures and what isn’t comparable
Calculated by MowerFacts
- XC 720 SSi works out to 11.1 acres/hour; PRO-STANCE ULTRA 72 FX1000 EFI works out to 7.3 acres/hour, a 3.8 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
- Weight: not published for XC 720 SSi.
- Warranty: not published for PRO-STANCE ULTRA 72 FX1000 EFI.
- Blades: not published for PRO-STANCE ULTRA 72 FX1000 EFI.
- Transmission: not published for PRO-STANCE ULTRA 72 FX1000 EFI.
- Deck Construction: not published for XC 720 SSi.
- Drive System: not published for XC 720 SSi.
- Discharge: not published for XC 720 SSi.
- Cut height range: not published for PRO-STANCE ULTRA 72 FX1000 EFI.
- Price: XC 720 SSi 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 | XC 720 SSi Altoz · Commercial |
PRO-STANCE ULTRA 72 FX1000 EFI Gravely · Commercial |
|---|---|---|
| List price | dealer quote | $15,799 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Kawasaki® |
| Displacement | 61 ci (999 cc) | 61 ci (999 cc) |
| Engine Power | 35 hp | 38.5 hp |
| Cylinders | 2 | — |
| Engine Model | FX1000V EFI | FX1000 EFI |
| Fuel Type | Gasoline | Gas |
| Deck | ||
| Cutting Width | 72 in (1829 mm) | 72 in (1829 mm) |
| Blades | 3 | — |
| Deck Material | Fabricated Steel | 7 ga |
| Deck Construction | — | Fabricated X-Factor® 3 |
| Deck Gauge | — | 7 |
| Anti-Scalp Rollers | Yes | — |
| Min Cut Height | 1.5 in (38 mm) | — |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | — |
| Discharge | — | Side |
| Max Cut Height | 5 in (127 mm) | — |
| Drive | ||
| Transmission | Hydrostatic | — |
| Ground Speed | 19 mph | 12.5 mph |
| Drive Tire Size | 26" | — |
| Reverse Speed | — | 5 mph |
| Drive System | — | Parker HTG |
| Dimensions | ||
| Weight | — | 1440 lbs (653.2 kg) |
| Fuel Capacity | 14 gal (53 L) | 16 gal (60.6 L) |
| Length | 89 in (2261 mm) | — |
| General | ||
| Warranty | 3 yr | — |
Where these models differ, explained
XC 720 SSi: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
PRO-STANCE ULTRA 72 FX1000 EFI: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — gravely.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.