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 766 i — commercial: daily paid use and high acreage; 66-inch deck; gas powered
- Altoz TRX 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.
- TRX 766 i has a 38.5 hp engine; TRX 561 i has a 29.5 hp engine, a 9 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.
- TRX 766 i has a published top speed of 11 mph; TRX 561 i has a published top speed of 9 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.
- TRX 766 i weighs 1,780 lbs (807.4 kg); TRX 561 i weighs 1,540 lbs (698.5 kg), a 240 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What TRX 766 i's weight means for a trailer ›
- TRX 766 i has a 61 ci (999 cc) engine; TRX 561 i has a 52 ci (852 cc) engine, a 9 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
- TRX 766 i has a 66 in (1,676 mm) deck; TRX 561 i has a 61 in (1,549 mm) deck, a 5 in difference. Deck width sets how much grass each pass covers. Mowing time also depends on ground speed, turns and obstacles, so a wider deck alone does not fix the job's length. Time both decks on your own lawn ›
calculated figures
Calculated by MowerFacts
- TRX 766 i works out to 5.9 acres/hour; TRX 561 i works out to 4.4 acres/hour, a 1.4 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.
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 766 i Altoz · Commercial |
TRX 561 i Altoz · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Kawasaki |
| Displacement | 61 ci (999 cc) | 52 ci (852 cc) |
| Engine Power | 38.5 hp | 29.5 hp |
| Cylinders | 2 | 2 |
| Engine Model | FX EFI | FX EFI |
| Fuel Type | Gasoline | Gasoline |
| Deck | ||
| Cutting Width | 66 in (1676 mm) | 61 in (1549 mm) |
| Blades | 6 | 6 |
| Deck Material | Fabricated Steel All-Terrain Deck or Aero Deck | Fabricated Steel All-Terrain Deck or Aero Deck |
| Anti-Scalp Rollers | No | No |
| Min Cut Height | 3 in (76 mm) | 3 in (76 mm) |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | 18501 ft/min (5639 m/min) |
| Max Cut Height | 7 in (178 mm) | 7 in (178 mm) |
| Drive | ||
| Transmission | Hydrostatic | Hydrostatic |
| Ground Speed | 11 mph | 9 mph |
| Dimensions | ||
| Weight | 1780 lbs (807.4 kg) | 1540 lbs (698.5 kg) |
| Fuel Capacity | 14 gal (53 L) | 14 gal (53 L) |
| Length | 96 in (2438 mm) | 93 in (2362 mm) |
| General | ||
| Warranty | 3 yr | 3 yr |
Where these models differ, explained
TRX 766 i: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
TRX 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.