Compare Mowers
Prices are the recommended retail prices published by each manufacturer’s Australian site, in AUD, as read on the date shown on each model’s page; dealers set the final price.
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 Z554L — commercial: daily paid use and high acreage; 54-inch deck; gas powered
- Spartan Spartan RTHD 54 in Zero Turn Mower — 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.
- Z554L has a Hydrostatic transmission; Spartan RTHD 54 in Zero Turn Mower has a Parker HTJ wheel motors transmission. The transmission grade tracks duty rating and speed. Grade names are each maker's own and are not comparable across brands.
- Z554L has Collect/Mulch/Side discharge discharge; Spartan RTHD 54 in Zero Turn Mower has High density, rubberised discharge.
- Z554L holds 45.4 L (12 gal) of fuel; Spartan RTHD 54 in Zero Turn Mower holds 35.9 L (9.5 gal) of fuel, a 9.5 L 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.
- Z554L weighs 551.1 kg (1,215 lbs); Spartan RTHD 54 in Zero Turn Mower weighs 502.5 kg (1,108 lbs), a 48.6 kg difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Z554L's weight means for a trailer ›
- Z554L has a published top speed of 12 mph; Spartan RTHD 54 in Zero Turn Mower has a published top speed of 11 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.
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- Z554L cuts from 25 mm (1 in) to 127 mm (5 in); Spartan RTHD 54 in Zero Turn Mower cuts from 38 mm (1.5 in) to 140 mm (5.5 in).
Calculated by MowerFacts
- Z554L works out to 2.12 ha/hour; Spartan RTHD 54 in Zero Turn Mower works out to 1.94 ha/hour, a 0.18 ha/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
- Displacement: not published for Spartan RTHD 54 in Zero Turn Mower.
- Warranty: not published for Z554L.
- Fuel Type: not published for Z554L.
- Deck Material: not published for Spartan RTHD 54 in Zero Turn Mower.
- Deck Construction: not published for Z554L.
- Drive System: not published for Z554L.
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 | Z554L Husqvarna · Commercial |
Spartan RTHD 54 in Zero Turn Mower Spartan · Commercial |
|---|---|---|
| RRP (AUD) | A$23,499 | A$23,499 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Air cooled, 90-degree V-Twin, normally aspirated petrol engine |
| Displacement | 52 ci (852.1 cc) | — |
| Engine Power | 27 hp | 27 hp |
| Cylinders | 2 | — |
| Engine Model | FX Series V-Twin | — |
| Fuel Type | — | Unleaded fuel - maximum of 10% ethanol in fuel (see engine manufacturers specifications) |
| Deck | ||
| Cutting Width | 54 in (1372 mm) | 54 in (1372 mm) |
| Blades | 3 | 3 |
| Deck Material | Steel | — |
| Deck Construction | — | Fabricated 7 Gauge with 7 gauge spindle mounts and 9/16 impact bar |
| Spindle Type | — | 7 Gauge |
| Anti-Scalp Rollers | Yes | — |
| Min Cut Height | 1 in (25 mm) | 1.5 in (38 mm) |
| Blade Tip Speed | — | 18684 ft/min (5695 m/min) |
| Discharge | Collect/Mulch/Side discharge | High density, rubberised |
| Cut Positions | 16 | — |
| Max Cut Height | 5 in (127 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | Hydrostatic | Parker HTJ wheel motors |
| Ground Speed | 12 mph | 11 mph |
| Drive Tire Size | — | 24” Turf radials. |
| Drive System | — | V-belt drive from engine crankshaft |
| Dimensions | ||
| Weight | 1215 lbs (551.1 kg) | 1108 lbs (502.5 kg) |
| Fuel Capacity | 12 gal (45.4 L) | 9.5 gal (35.9 L) |
| Length | 81 in (2057 mm) | 84 in (2134 mm) |
| Width | — | 55.5 in (1410 mm) |
| Height | 21 in (533 mm) | 75 in (1905 mm) |
| Commercial / Pro | ||
| Frame Construction | — | Fabricated 7 Gauge with 7 gauge spindle mounts and 9/16 impact bar |
| Seat Type | Premium, suspension | TCB-3 TecsPak Elastomer Dampeners with 360 Floating System |
| Commercial Warranty | — | 2 Years / Unlimited Hours Commercial Warranty |
| General | ||
| Warranty | — | 3 yr |
Where these models differ, explained
Z554L: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — husqvarna.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.