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
- Exmark Lazer Z E-Series (52 in) — 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; Lazer Z E-Series (52 in) uses a Kawasaki FX730V 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 has a published top speed of 6.5 mph; Lazer Z E-Series (52 in) has a published top speed of 11 mph, a 4.5 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 holds 4.7 gal (17.8 L) of fuel; Lazer Z E-Series (52 in) holds 9.5 gal (36 L) of fuel, a 4.8 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 cuts from 1 in (25 mm) to 4 in (102 mm); Lazer Z E-Series (52 in) cuts from 1.5 in (38 mm) to 5.5 in (140 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
- Walker Model D21d has a 20.9 hp engine; Lazer Z E-Series (52 in) 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.
calculated figures and what isn’t comparable
Calculated by MowerFacts
- Walker Model D21d works out to 2.7 acres/hour; Lazer Z E-Series (52 in) works out to 4.6 acres/hour, a 1.9 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 Lazer Z E-Series (52 in).
- Fuel Type: not published for Lazer Z E-Series (52 in).
- Deck Material: not published for Walker Model D21d.
- 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 |
Lazer Z E-Series (52 in) Exmark · Commercial |
|---|---|---|
| List price | dealer quote | $10,849 |
| Engine | ||
| Power Source | diesel | gas |
| Engine Make | Kubota | Kawasaki FX730V |
| Displacement | 43.9 ci (719 cc) | 44.3 ci (726 cc) |
| Engine Power | 20.9 hp | 23.5 hp |
| Fuel Type | Diesel (2-D) | — |
| Deck | ||
| Cutting Width | 52 in (1321 mm) | 52 in (1321 mm) |
| Deck Material | — | 10 ga. high-strength alloy steel |
| Deck Gauge | — | 10 |
| Min Cut Height | 1 in (25 mm) | 1.5 in (38 mm) |
| Max Cut Height | 4 in (102 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | Dual Hydrostatic Eaton Model 7 transmission with ductile cast iron final drive, Each Wheel Independently Driven | — |
| Ground Speed | 6.5 mph | 11 mph |
| Dimensions | ||
| Weight | 1001 lbs (454 kg) | 1019 lbs (462.2 kg) |
| Fuel Capacity | 4.7 gal (17.8 L) | 9.5 gal (36 L) |
| Length | — | 84.6 in (2149 mm) |
| Width | — | 64.7 in (1643 mm) |
| Height | — | 70.1 in (1781 mm) |
Where these models differ, explained
Walker Model D21d: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — walker.com.
Lazer Z E-Series (52 in): Specs verified against the manufacturer spec sheet on Jun 6, 2026 — exmark.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.