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.
- Husqvarna Z554X — commercial: daily paid use and high acreage; 54-inch deck; gas powered
- Altoz XP 540 HD / 660 HD / 720 HD — commercial: daily paid use and high acreage; 54-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Z554X has a Steel deck; XP 540 HD / 660 HD / 720 HD has a Fabricated Steel deck.
- Z554X has a 31 hp engine; XP 540 HD / 660 HD / 720 HD has a 27 hp engine, a 4 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.
- Z554X has a 61 ci (999.6 cc) engine; XP 540 HD / 660 HD / 720 HD has a 52 ci (852 cc) engine, a 9 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
- Z554X holds 12 gal (45.4 L) of fuel; XP 540 HD / 660 HD / 720 HD holds 14 gal (53 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.
- Z554X cuts from 1 in (25 mm) to 5 in (127 mm); XP 540 HD / 660 HD / 720 HD cuts from 1.5 in (38 mm) to 5 in (127 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
2 more differences, calculated figures and what isn’t comparable
Other verified differences
- Z554X has a published top speed of 12 mph; XP 540 HD / 660 HD / 720 HD has a published top speed of 11 mph, a 1 mph difference.
- Z554X weighs 1,250 lbs (567 kg); XP 540 HD / 660 HD / 720 HD weighs 1,330 lbs (603.3 kg), a 80 lbs difference.
Calculated by MowerFacts
- Z554X works out to 5.2 acres/hour; XP 540 HD / 660 HD / 720 HD works out to 4.8 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 Z554X.
- Fuel Type: not published for Z554X.
- Discharge: not published for XP 540 HD / 660 HD / 720 HD.
- Price: XP 540 HD / 660 HD / 720 HD 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 | Z554X Husqvarna · Commercial |
XP 540 HD / 660 HD / 720 HD Altoz · Commercial |
|---|---|---|
| List price | $15,399 | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Kawasaki |
| Displacement | 61 ci (999.6 cc) | 52 ci (852 cc) |
| Engine Power | 31 hp | 27 hp |
| Cylinders | 2 | 2 |
| Engine Model | FX Series V-Twin | FX |
| Fuel Type | — | Gasoline |
| Deck | ||
| Cutting Width | 54 in (1372 mm) | 54 in (1372 mm) |
| Blades | 3 | 3 |
| Deck Material | Steel | Fabricated Steel |
| Anti-Scalp Rollers | Yes | Yes |
| Min Cut Height | 1 in (25 mm) | 1.5 in (38 mm) |
| Blade Tip Speed | — | 18501 ft/min (5639 m/min) |
| Discharge | Collect/Mulch/Side discharge | — |
| Cut Positions | 16 | — |
| Max Cut Height | 5 in (127 mm) | 5 in (127 mm) |
| Drive | ||
| Transmission | Hydrostatic | Hydrostatic |
| Ground Speed | 12 mph | 11 mph |
| Drive Tire Size | — | 24" |
| Dimensions | ||
| Weight | 1250 lbs (567 kg) | 1330 lbs (603.3 kg) |
| Fuel Capacity | 12 gal (45.4 L) | 14 gal (53 L) |
| Length | 81 in (2057 mm) | 83.5 in (2121 mm) |
| Height | 21 in (533 mm) | — |
| Commercial / Pro | ||
| Seat Type | Premium, suspension | — |
| General | ||
| Warranty | — | 3 yr |
Where these models differ, explained
Z554X: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — husqvarna.com.
XP 540 HD / 660 HD / 720 HD: 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.