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 TRX 561 i — commercial: daily paid use and high acreage; 61-inch deck; gas powered
- Bobcat ZT6100 Zero-Turn Mower — 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.
- TRX 561 i has a Hydrostatic transmission; ZT6100 Zero-Turn Mower has a HG ZT-4400 Hydrostatic Transaxles transmission. The transmission grade tracks duty rating and speed. Grade names are each maker's own and are not comparable across brands.
- TRX 561 i has a published top speed of 9 mph; ZT6100 Zero-Turn Mower has a published top speed of 12 mph, a 3 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- TRX 561 i cuts from 3 in (76 mm) to 7 in (178 mm); ZT6100 Zero-Turn Mower cuts from 1 in (25 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.
- TRX 561 i holds 14 gal (53 L) of fuel; ZT6100 Zero-Turn Mower holds 15 gal (56.8 L) of fuel, a 1 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.
- TRX 561 i weighs 1,540 lbs (698.5 kg); ZT6100 Zero-Turn Mower weighs 1,464 lbs (664.1 kg), a 76 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What TRX 561 i's weight means for a trailer ›
calculated figures and what isn’t comparable
Calculated by MowerFacts
- TRX 561 i works out to 4.4 acres/hour; ZT6100 Zero-Turn Mower works out to 5.9 acres/hour, a 1.5 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 TRX 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 | TRX 561 i Altoz · Commercial |
ZT6100 Zero-Turn Mower Bobcat · 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 | FX EFI | Kaw FX850V EFI |
| Fuel Type | Gasoline | — |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 61 in (1549 mm) |
| Blades | 6 | — |
| Deck Material | Fabricated Steel All-Terrain Deck or Aero Deck | — |
| Deck Construction | — | AirFX Cutting System |
| Anti-Scalp Rollers | No | — |
| Min Cut Height | 3 in (76 mm) | 1 in (25 mm) |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | 18501 ft/min (5639 m/min) |
| Max Cut Height | 7 in (178 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | Hydrostatic | HG ZT-4400 Hydrostatic Transaxles |
| Ground Speed | 9 mph | 12 mph |
| Drive Tire Size | — | 24 x 12.0-12 |
| Reverse Speed | — | 4 mph |
| Dimensions | ||
| Weight | 1540 lbs (698.5 kg) | 1464 lbs (664.1 kg) |
| Fuel Capacity | 14 gal (53 L) | 15 gal (56.8 L) |
| Length | 93 in (2362 mm) | 83 in (2108 mm) |
| Commercial / Pro | ||
| Seat Type | — | Extra-High Back, Full-Mechanical Suspension Seat |
| General | ||
| Warranty | 3 yr | — |
Where these models differ, explained
TRX 561 i: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
ZT6100 Zero-Turn Mower: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — bobcat.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.