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 ZD1011-54 — commercial: daily paid use and high acreage; 54-inch deck
- Walker Walker Model D21d — commercial: daily paid use and high acreage; 52-inch deck
What’s different? The 5 differences that matter most, from the published figures.
- ZD1011-54 has a published top speed of 9 mph; Walker Model D21d has a published top speed of 6.5 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.
- ZD1011-54 weighs 1,323 lbs (600.1 kg); Walker Model D21d weighs 1,001 lbs (454 kg), a 322 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What ZD1011-54's weight means for a trailer ›
- ZD1011-54 holds 6 gal (22.7 L) of fuel; Walker Model D21d holds 4.7 gal (17.8 L) of fuel, a 1.3 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.
- ZD1011-54 has a 19.3 hp engine; Walker Model D21d has a 20.9 hp engine, a 1.6 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.
- ZD1011-54 has a 47.5 ci (778 cc) engine; Walker Model D21d has a 43.9 ci (719 cc) engine, a 3.6 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- ZD1011-54 has a 54 in (1,372 mm) deck; Walker Model D21d has a 52 in (1,321 mm) deck, a 2 in difference.
Calculated by MowerFacts
- ZD1011-54 works out to 3.9 acres/hour; Walker Model D21d works out to 2.7 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
- Drive System: not published for Walker Model D21d.
- Cut height range: not published for ZD1011-54.
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 | ZD1011-54 Kubota · Commercial |
Walker Model D21d Walker · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | diesel | diesel |
| Engine Make | Kubota D782-E4-ZD-3 | Kubota |
| Displacement | 47.5 ci (778 cc) | 43.9 ci (719 cc) |
| Engine Power | 19.3 hp | 20.9 hp |
| Fuel Type | Diesel | Diesel (2-D) |
| Deck | ||
| Cutting Width | 54 in (1372 mm) | 52 in (1321 mm) |
| Min Cut Height | — | 1 in (25 mm) |
| Max Cut Height | — | 4 in (102 mm) |
| Drive | ||
| Transmission | Kubota HST | Dual Hydrostatic Eaton Model 7 transmission with ductile cast iron final drive, Each Wheel Independently Driven |
| Ground Speed | 9 mph | 6.5 mph |
| Drive System | Shaft | — |
| Dimensions | ||
| Weight | 1323 lbs (600.1 kg) | 1001 lbs (454 kg) |
| Fuel Capacity | 6 gal (22.7 L) | 4.7 gal (17.8 L) |
ZD1011-54: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kubotausa.com.
Walker Model D21d: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — walker.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.