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.
- Kubota Z421KWTNC-60 — commercial: daily paid use and high acreage; 60-inch deck; gas powered
- Gravely PRO-TURN ZX 60 KAWASAKI — commercial: daily paid use and high acreage; 60-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Z421KWTNC-60 has Belt drive; PRO-TURN ZX 60 KAWASAKI has Hydro-Gear® ZT-3200™ Transaxles drive.
- Z421KWTNC-60 holds 6.8 gal (25.7 L) of fuel; PRO-TURN ZX 60 KAWASAKI holds 5.1 gal (19.3 L) of fuel, a 1.7 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.
- Z421KWTNC-60 has a published top speed of 10 mph; PRO-TURN ZX 60 KAWASAKI has a published top speed of 8.5 mph, a 1.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- Z421KWTNC-60 has a 24 hp engine; PRO-TURN ZX 60 KAWASAKI has a 23.5 hp engine, a 0.5 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.
- Z421KWTNC-60 weighs 904 lbs (410.1 kg); PRO-TURN ZX 60 KAWASAKI weighs 925 lbs (419.6 kg), a 21 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Z421KWTNC-60's weight means for a trailer ›
calculated figures and what isn’t comparable
Calculated by MowerFacts
- Z421KWTNC-60 works out to 4.8 acres/hour; PRO-TURN ZX 60 KAWASAKI works out to 4.1 acres/hour, a 0.7 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
- Transmission: not published for PRO-TURN ZX 60 KAWASAKI.
- Deck Material: not published for Z421KWTNC-60.
- Deck Construction: not published for Z421KWTNC-60.
- Discharge: not published for Z421KWTNC-60.
- Price: Z421KWTNC-60 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 | Z421KWTNC-60 Kubota · Zero-Turn |
PRO-TURN ZX 60 KAWASAKI Gravely · Zero-Turn |
|---|---|---|
| List price | dealer quote | $9,999 |
| Engine | ||
| Power Source | gas | gas |
| Displacement | 44.3 ci (726 cc) | 44.3 ci (726 cc) |
| Engine Power | 24 hp | 23.5 hp |
| Engine Make | Kawasaki FS730V | Kawasaki® |
| Fuel Type | Gasoline | Gas |
| Engine Model | — | FX730V |
| Deck | ||
| Cutting Width | 60 in (1524 mm) | 60 in (1524 mm) |
| Deck Material | — | 7 ga |
| Deck Construction | — | Fabricated X-Factor® 3 |
| Deck Gauge | — | 7 |
| Discharge | — | Side |
| Drive | ||
| Transmission | Hydro-Gear Commercial ZT-3600 | — |
| Ground Speed | 10 mph | 8.5 mph |
| Drive Tire Size | 24 x 12 -14, LP | — |
| Reverse Speed | — | 4 mph |
| Drive System | Belt | Hydro-Gear® ZT-3200™ Transaxles |
| Dimensions | ||
| Weight | 904 lbs (410.1 kg) | 925 lbs (419.6 kg) |
| Fuel Capacity | 6.8 gal (25.7 L) | 5.1 gal (19.3 L) |
Where these models differ, explained
Z421KWTNC-60: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kubotausa.com.
PRO-TURN ZX 60 KAWASAKI: Specs verified against the retailer listing on Jun 6, 2026 — cuttingedgelawn.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.