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.
- Bobcat ZT6100 Zero-Turn Mower — commercial: daily paid use and high acreage; 61-inch deck; gas powered
- Altoz TSX 561 i — commercial: daily paid use and high acreage; 61-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- ZT6100 Zero-Turn Mower has a HG ZT-4400 Hydrostatic Transaxles transmission; TSX 561 i 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.
- ZT6100 Zero-Turn Mower holds 15 gal (56.8 L) of fuel; TSX 561 i holds 8.5 gal (32.2 L) of fuel, a 6.5 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.
- ZT6100 Zero-Turn Mower cuts from 1 in (25 mm) to 5.5 in (140 mm); TSX 561 i cuts from 2.5 in (64 mm) to 5.5 in (140 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
- ZT6100 Zero-Turn Mower has a published top speed of 12 mph; TSX 561 i has a published top speed of 10 mph, a 2 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- ZT6100 Zero-Turn Mower weighs 1,464 lbs (664.1 kg); TSX 561 i weighs 1,532 lbs (694.9 kg), a 68 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What ZT6100 Zero-Turn Mower's weight means for a trailer ›
calculated figures and what isn’t comparable
Calculated by MowerFacts
- ZT6100 Zero-Turn Mower works out to 5.9 acres/hour; TSX 561 i works out to 4.9 acres/hour, a 1.0 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
- Displacement: not published for ZT6100 Zero-Turn Mower.
- Warranty: not published for ZT6100 Zero-Turn Mower.
- Blades: not published for ZT6100 Zero-Turn Mower.
- Engine Make: not published for ZT6100 Zero-Turn Mower.
- Fuel Type: not published for ZT6100 Zero-Turn Mower.
- Deck Material: not published for ZT6100 Zero-Turn Mower.
- Deck Construction: not published for TSX 561 i.
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 | ZT6100 Zero-Turn Mower Bobcat · Commercial |
TSX 561 i Altoz · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | — | Kawasaki |
| Displacement | — | 52 ci (852 cc) |
| Engine Power | 29.5 hp | 29.5 hp |
| Cylinders | — | 2 |
| Engine Model | Kaw FX850V EFI | FX EFI |
| Fuel Type | — | Gasoline |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 61 in (1549 mm) |
| Blades | — | 6 |
| Deck Material | — | Fabricated Steel HV All-Terrain Deck or Aero Deck |
| Deck Construction | AirFX Cutting System | — |
| Anti-Scalp Rollers | — | No |
| Min Cut Height | 1 in (25 mm) | 2.5 in (64 mm) |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | 17251 ft/min (5258 m/min) |
| Max Cut Height | 5.5 in (140 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | HG ZT-4400 Hydrostatic Transaxles | Hydrostatic |
| Ground Speed | 12 mph | 10 mph |
| Drive Tire Size | 24 x 12.0-12 | — |
| Reverse Speed | 4 mph | — |
| Dimensions | ||
| Weight | 1464 lbs (664.1 kg) | 1532 lbs (694.9 kg) |
| Fuel Capacity | 15 gal (56.8 L) | 8.5 gal (32.2 L) |
| Length | 83 in (2108 mm) | 75 in (1905 mm) |
| Height | — | 50 in (1270 mm) |
| Commercial / Pro | ||
| Seat Type | Extra-High Back, Full-Mechanical Suspension Seat | — |
| General | ||
| Warranty | — | 3 yr |
Where these models differ, explained
ZT6100 Zero-Turn Mower: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — bobcat.com.
TSX 561 i: 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.