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.
- Hustler Turf Diesel Z — commercial: daily paid use and high acreage; 72-inch deck
- John Deere Z994R DieselZTrak Zero-Turn Mower — commercial: daily paid use and high acreage; 72-inch deck
What’s different? The 3 differences that matter most, from the published figures.
- Diesel Z holds 14.4 gal (54.5 L) of fuel; Z994R DieselZTrak Zero-Turn Mower holds 11.5 gal (43.5 L) of fuel, a 2.9 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.
- Diesel Z has a 69 ci (1,130 cc) engine; Z994R DieselZTrak Zero-Turn Mower has a 77.3 ci (1,266.7 cc) engine, a 8.3 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
- Diesel Z weighs 1,711 lbs (776.1 kg); Z994R DieselZTrak Zero-Turn Mower weighs 1,810 lbs (821 kg), a 99 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Diesel Z's weight means for a trailer ›
what isn’t comparable
Not comparable
- Warranty: not published for Z994R DieselZTrak Zero-Turn Mower.
- Engine Make: not published for Z994R DieselZTrak Zero-Turn Mower.
- Fuel Type: not published for Diesel Z.
- Deck Construction: not published for Diesel Z.
- Cut height range: not published for Z994R DieselZTrak Zero-Turn Mower.
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 | Diesel Z Hustler Turf · Commercial |
Z994R DieselZTrak Zero-Turn Mower John Deere · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | diesel | diesel |
| Engine Make | Perkins | — |
| Displacement | 69 ci (1130 cc) | 77.3 ci (1266.7 cc) |
| Engine Power | 25 hp | 24.7 hp |
| Cylinders | — | 3 |
| Fuel Type | — | Diesel or Biodiesel (up to B20) |
| Engine Model | — | 3TNV80F |
| Deck | ||
| Cutting Width | 72 in (1829 mm) | 72 in (1829 mm) |
| Deck Construction | — | 7-Iron™ PRO: 7-gauge, 0.179-in. (4.6-mm) one-piece forged steel FastBack™ PRO: 7-gauge, 0.179-in. (4.6-mm) fabricated steel |
| Min Cut Height | 1 in (25 mm) | — |
| Max Cut Height | 5.5 in (140 mm) | — |
| Drive | ||
| Transmission | Tandem Hydro-Gear 21cc pumps with Parker TG wheel motors | Dual hydrostatic wheel drive TuffTorq heavy-duty ground drive with cross porting for improved cooling |
| Ground Speed | 11.5 mph | 11.4 mph |
| Drive Type | Dual Hydrostatic | — |
| Dimensions | ||
| Weight | 1711 lbs (776.1 kg) | 1810 lbs (821 kg) |
| Fuel Capacity | 14.4 gal (54.5 L) | 11.5 gal (43.5 L) |
| General | ||
| Warranty | 5 yr | — |
Where these models differ, explained
Diesel Z: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — hustlerturf.com.
Z994R DieselZTrak Zero-Turn Mower: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — deere.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.