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.
- Spartan Spartan RTHD 54 in Zero Turn Mower — commercial: daily paid use and high acreage; 54-inch deck; gas powered
- Husqvarna Z554L — 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.
- Spartan RTHD 54 in Zero Turn Mower has a Parker HTJ wheel motors transmission; Z554L has a Hydrostatic transmission. The transmission grade tracks duty rating and speed. Grade names are each maker's own and are not comparable across brands.
- Spartan RTHD 54 in Zero Turn Mower has High density, rubberised discharge; Z554L has Collect/Mulch/Side discharge discharge.
- Spartan RTHD 54 in Zero Turn Mower holds 35.9 L (9.5 gal) of fuel; Z554L holds 45.4 L (12 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.
- Spartan RTHD 54 in Zero Turn Mower weighs 502.5 kg (1,108 lbs); Z554L weighs 551.1 kg (1,215 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 Spartan RTHD 54 in Zero Turn Mower's weight means for a trailer ›
- Spartan RTHD 54 in Zero Turn Mower has a published top speed of 11 mph; Z554L has a published top speed of 12 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
- Spartan RTHD 54 in Zero Turn Mower cuts from 38 mm (1.5 in) to 140 mm (5.5 in); Z554L cuts from 25 mm (1 in) to 127 mm (5 in).
Calculated by MowerFacts
- Spartan RTHD 54 in Zero Turn Mower works out to 1.94 ha/hour; Z554L works out to 2.12 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 | Spartan RTHD 54 in Zero Turn Mower Spartan · Commercial |
Z554L Husqvarna · Commercial |
|---|---|---|
| RRP (AUD) | A$23,499 | A$23,499 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Air cooled, 90-degree V-Twin, normally aspirated petrol engine | Kawasaki |
| 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 | 1.5 in (38 mm) | 1 in (25 mm) |
| Blade Tip Speed | 18684 ft/min (5695 m/min) | — |
| Discharge | High density, rubberised | Collect/Mulch/Side discharge |
| Cut Positions | — | 16 |
| Max Cut Height | 5.5 in (140 mm) | 5 in (127 mm) |
| Drive | ||
| Transmission | Parker HTJ wheel motors | Hydrostatic |
| Ground Speed | 11 mph | 12 mph |
| Drive Tire Size | 24” Turf radials. | — |
| Drive System | V-belt drive from engine crankshaft | — |
| Dimensions | ||
| Weight | 1108 lbs (502.5 kg) | 1215 lbs (551.1 kg) |
| Fuel Capacity | 9.5 gal (35.9 L) | 12 gal (45.4 L) |
| Length | 84 in (2134 mm) | 81 in (2057 mm) |
| Width | 55.5 in (1410 mm) | — |
| Height | 75 in (1905 mm) | 21 in (533 mm) |
| Commercial / Pro | ||
| Frame Construction | Fabricated 7 Gauge with 7 gauge spindle mounts and 9/16 impact bar | — |
| Seat Type | TCB-3 TecsPak Elastomer Dampeners with 360 Floating System | Premium, suspension |
| 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.