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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 Z781KWiTW-54 — commercial: daily paid use and high acreage; 54-inch deck; gas powered
- Kubota Z781KWi-54 — commercial: daily paid use and high acreage; 54-inch deck; gas powered
What’s different? The 2 differences that matter most, from the published figures.
- Z781KWiTW-54 uses a Kawasaki FX850VEFI engine; Z781KWi-54 uses a Kawasaki FX850-EFI 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.
- Z781KWiTW-54 cuts from 1 in (25 mm) to 5.5 in (140 mm); Z781KWi-54 cuts from 1 in (25 mm) to 5 in (127 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
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 | Z781KWiTW-54 Kubota · Zero-Turn |
Z781KWi-54 Kubota · Zero-Turn |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Displacement | 52 ci (852 cc) | 52 ci (852 cc) |
| Engine Power | 29.5 hp | 29.5 hp |
| Engine Make | Kawasaki FX850VEFI | Kawasaki FX850-EFI |
| Fuel Type | Gasoline | Gasoline |
| Deck | ||
| Cutting Width | 54 in (1372 mm) | 54 in (1372 mm) |
| Min Cut Height | 1 in (25 mm) | 1 in (25 mm) |
| Max Cut Height | 5.5 in (140 mm) | 5 in (127 mm) |
| Deck Gauge | 8 | — |
| Drive | ||
| Transmission | Parker HTG14 | Parker HTG14 |
| Ground Speed | 11.2 mph | 11.2 mph |
| Drive System | Belt | Belt |
| Dimensions | ||
| Weight | 1254 lbs (568.8 kg) | 1254 lbs (568.8 kg) |
| Fuel Capacity | 11.6 gal (43.9 L) | 11.6 gal (43.9 L) |
| Length | 83.9 in (2131 mm) | — |
| Width | 67.3 in (1709 mm) | — |
| Height | 48.6 in (1234 mm) | — |
Where these models differ, explained
Z781KWiTW-54: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kubotausa.com.
Z781KWi-54: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kubotausa.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.