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.
- Grasshopper SO37 — commercial: daily paid use and high acreage; 61-inch deck; gas powered
- Spartan Spartan SRT-XD — 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.
- SO37 uses a Vanguard engine; Spartan SRT-XD uses a Kawasaki 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.
- SO37 holds 13.5 gal (51.1 L) of fuel; Spartan SRT-XD holds 9.5 gal (36 L) of fuel, a 4 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.
- SO37 has a published top speed of 10.5 mph; Spartan SRT-XD has a published top speed of 13 mph, a 2.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- SO37 lists at $13,365; Spartan SRT-XD lists at $15,299, a $1,934 difference. List price is the maker's own figure before tax, freight and dealer setup. Dealers set the final price.
- SO37 has a 37 hp engine; Spartan SRT-XD has a 38.5 hp engine, a 1.5 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.
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- SO37 weighs 1,250 lbs (567 kg); Spartan SRT-XD weighs 1,290 lbs (585.1 kg), a 40 lbs difference.
Calculated by MowerFacts
- SO37 works out to 5.2 acres/hour; Spartan SRT-XD works out to 6.4 acres/hour, a 1.2 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
- Warranty: not published for SO37.
- Transmission: not published for Spartan SRT-XD.
- Fuel Type: not published for Spartan SRT-XD.
- Deck Construction: not published for SO37.
- Cut height range: not published for SO37.
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 | SO37 Grasshopper · Commercial |
Spartan SRT-XD Spartan · Commercial |
|---|---|---|
| List price | $13,365 | $15,299 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Vanguard | Kawasaki |
| Displacement | 60.6 ci (993 cc) | 61 ci (999 cc) |
| Engine Power | 37 hp | 38.5 hp |
| Cylinders | 2 | — |
| Fuel Type | Gasoline | — |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 61 in (1549 mm) |
| Deck Construction | — | 6" Deep, Reinforced 7 Gauge Full-Floating Deck |
| Min Cut Height | — | 1.5 in (38 mm) |
| Max Cut Height | — | 4.8 in (121 mm) |
| Drive | ||
| Transmission | T6 Drive Transmission | — |
| Ground Speed | 10.5 mph | 13 mph |
| Drive Tire Size | — | 24x14-R12 Radial |
| Dimensions | ||
| Weight | 1250 lbs (567 kg) | 1290 lbs (585.1 kg) |
| Fuel Capacity | 13.5 gal (51.1 L) | 9.5 gal (36 L) |
| Length | — | 84 in (2134 mm) |
| Height | — | 75 in (1905 mm) |
| Commercial / Pro | ||
| Frame Construction | — | 1.5" by 3" Powder Coated Fusion-Bonded Solid Steel Bridge Frame |
| Seat Type | — | Smart Ride Technology w/ full suspension seat - adjustable TecsPak Elastomer supports - 360 degree floating seat platform - indepentant rear frame section suspended by Winamac coil springs |
| General | ||
| Warranty | — | 3 yr |
Where these models differ, explained
SO37: Specs verified against the retailer listing on Jun 6, 2026 — tommysmotorsportscrossville.com.
Spartan SRT-XD: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — joinspartannation.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.