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 XP 610 SSi — commercial: daily paid use and high acreage; 61-inch deck; gas powered
- Grasshopper SO37 — 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.
- XP 610 SSi uses a Kawasaki engine; SO37 uses a Vanguard engine. The engine maker builds the engine; the mower maker chooses the model, rating and fit, so the badge alone does not settle output or longevity.
- XP 610 SSi has a Hydrostatic transmission; SO37 has a T6 Drive Transmission transmission. The transmission grade tracks duty rating and speed. Grade names are each maker's own and are not comparable across brands.
- XP 610 SSi has a 50.2 ci (822 cc) engine; SO37 has a 60.6 ci (993 cc) engine, a 10.4 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
- XP 610 SSi has a 34.5 hp engine; SO37 has a 37 hp engine, a 2.5 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.
- XP 610 SSi has a published top speed of 11 mph; SO37 has a published top speed of 10.5 mph, a 0.5 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, what isn’t comparable
Other verified differences
- XP 610 SSi holds 14 gal (53 L) of fuel; SO37 holds 13.5 gal (51.1 L) of fuel, a 0.5 gal difference.
Not comparable
- Weight: not published for XP 610 SSi.
- Warranty: not published for SO37.
- Blades: not published for SO37.
- Fuel Type: not published for XP 610 SSi.
- Deck Material: not published for SO37.
- Cut height range: not published for SO37.
- Price: XP 610 SSi is dealer quote only.
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 | XP 610 SSi Altoz · Commercial |
SO37 Grasshopper · Commercial |
|---|---|---|
| List price | dealer quote | $13,365 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Vanguard |
| Displacement | 50.2 ci (822 cc) | 60.6 ci (993 cc) |
| Engine Power | 34.5 hp | 37 hp |
| Cylinders | 2 | 2 |
| Engine Model | FX EVO EFI | — |
| Fuel Type | — | Gasoline |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 61 in (1549 mm) |
| Blades | 3 | — |
| Deck Material | Aero Deck | — |
| Anti-Scalp Rollers | Yes | — |
| Min Cut Height | 1.5 in (38 mm) | — |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | — |
| Max Cut Height | 5 in (127 mm) | — |
| Drive | ||
| Transmission | Hydrostatic | T6 Drive Transmission |
| Ground Speed | 11 mph | 10.5 mph |
| Drive Tire Size | 24" | — |
| Dimensions | ||
| Weight | — | 1250 lbs (567 kg) |
| Fuel Capacity | 14 gal (53 L) | 13.5 gal (51.1 L) |
| General | ||
| Warranty | 3 yr | — |
Where these models differ, explained
XP 610 SSi: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
SO37: Specs verified against the retailer listing on Jun 6, 2026 — tommysmotorsportscrossville.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.