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.
- Walker Walker Model D21d — commercial: daily paid use and high acreage; 52-inch deck
- Gravely PRO-STANCE 52 KAWASAKI — commercial: daily paid use and high acreage; 52-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Walker Model D21d uses a Kubota engine; PRO-STANCE 52 KAWASAKI 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.
- Walker Model D21d holds 4.7 gal (17.8 L) of fuel; PRO-STANCE 52 KAWASAKI holds 9 gal (34.1 L) of fuel, a 4.3 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.
- Walker Model D21d runs on Diesel (2-D); PRO-STANCE 52 KAWASAKI runs on Gas. Fuel type sets what you buy and store; it is not a measure of power.
- Walker Model D21d has a published top speed of 6.5 mph; PRO-STANCE 52 KAWASAKI has a published top speed of 9 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.
- Walker Model D21d has a 20.9 hp engine; PRO-STANCE 52 KAWASAKI has a 23.5 hp engine, a 2.6 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
- Walker Model D21d weighs 1,001 lbs (454 kg); PRO-STANCE 52 KAWASAKI weighs 912 lbs (413.7 kg), a 89 lbs difference.
Calculated by MowerFacts
- Walker Model D21d works out to 2.7 acres/hour; PRO-STANCE 52 KAWASAKI works out to 3.8 acres/hour, a 1.1 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-STANCE 52 KAWASAKI.
- Deck Material: not published for Walker Model D21d.
- Deck Construction: not published for Walker Model D21d.
- Drive System: not published for Walker Model D21d.
- Discharge: not published for Walker Model D21d.
- Cut height range: not published for PRO-STANCE 52 KAWASAKI.
- Price: Walker Model D21d 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 | Walker Model D21d Walker · Commercial |
PRO-STANCE 52 KAWASAKI Gravely · Commercial |
|---|---|---|
| List price | dealer quote | $10,899 |
| Engine | ||
| Power Source | diesel | gas |
| Engine Make | Kubota | Kawasaki® |
| Displacement | 43.9 ci (719 cc) | 44.3 ci (725.9 cc) |
| Engine Power | 20.9 hp | 23.5 hp |
| Engine Model | — | FX730V |
| Fuel Type | Diesel (2-D) | Gas |
| Deck | ||
| Cutting Width | 52 in (1321 mm) | 52 in (1321 mm) |
| Deck Material | — | 7 ga |
| Deck Construction | — | Fabricated X-Factor® 3 |
| Deck Gauge | — | 7 |
| Min Cut Height | 1 in (25 mm) | — |
| Discharge | — | Side |
| Max Cut Height | 4 in (102 mm) | — |
| Drive | ||
| Transmission | Dual Hydrostatic Eaton Model 7 transmission with ductile cast iron final drive, Each Wheel Independently Driven | — |
| Ground Speed | 6.5 mph | 9 mph |
| Reverse Speed | — | 4 mph |
| Drive System | — | Hydro-Gear® ZT-3400 Transaxles |
| Dimensions | ||
| Weight | 1001 lbs (454 kg) | 912 lbs (413.7 kg) |
| Fuel Capacity | 4.7 gal (17.8 L) | 9 gal (34.1 L) |
Where these models differ, explained
Walker Model D21d: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — walker.com.
PRO-STANCE 52 KAWASAKI: Specs verified against the retailer listing on Jun 6, 2026 — brunkans.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.