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 XC 610 SSi — 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 published top speed of 12 mph; XC 610 SSi has a published top speed of 19 mph, a 7 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 has a HG ZT-4400 Hydrostatic Transaxles transmission; XC 610 SSi 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 cuts from 1 in (25 mm) to 5.5 in (140 mm); XC 610 SSi 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.
- ZT6100 Zero-Turn Mower has a 29.5 hp engine; XC 610 SSi has a 35 hp engine, a 5.5 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.
- ZT6100 Zero-Turn Mower holds 15 gal (56.8 L) of fuel; XC 610 SSi holds 14 gal (53 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.
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- ZT6100 Zero-Turn Mower weighs 1,464 lbs (664.1 kg); XC 610 SSi weighs 1,400 lbs (635 kg), a 64 lbs difference.
Calculated by MowerFacts
- ZT6100 Zero-Turn Mower works out to 5.9 acres/hour; XC 610 SSi works out to 9.4 acres/hour, a 3.4 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
- 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 XC 610 SSi.
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 |
XC 610 SSi Altoz · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | — | Kawasaki |
| Displacement | — | 61 ci (999 cc) |
| Engine Power | 29.5 hp | 35 hp |
| Cylinders | — | 2 |
| Engine Model | Kaw FX850V EFI | FX1000V EFI |
| Fuel Type | — | Gasoline |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 61 in (1549 mm) |
| Blades | — | 3 |
| Deck Material | — | Fabricated Steel |
| Deck Construction | AirFX Cutting System | — |
| Anti-Scalp Rollers | — | No |
| Min Cut Height | 1 in (25 mm) | 1.5 in (38 mm) |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | 18501 ft/min (5639 m/min) |
| Max Cut Height | 5.5 in (140 mm) | 5 in (127 mm) |
| Drive | ||
| Transmission | HG ZT-4400 Hydrostatic Transaxles | Hydrostatic |
| Ground Speed | 12 mph | 19 mph |
| Drive Tire Size | 24 x 12.0-12 | 26" |
| Reverse Speed | 4 mph | — |
| Dimensions | ||
| Weight | 1464 lbs (664.1 kg) | 1400 lbs (635 kg) |
| Fuel Capacity | 15 gal (56.8 L) | 14 gal (53 L) |
| Length | 83 in (2108 mm) | 85.5 in (2172 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.
XC 610 SSi: 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.