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.
- Wright Autonomous ZK 72 61G8 — commercial: daily paid use and high acreage; 72-inch deck; gas powered
- Wright Autonomous ZK 61 61G8 — commercial: daily paid use and high acreage; 61-inch deck; gas powered
What’s different? The 2 differences that matter most, from the published figures.
- Autonomous ZK 72 61G8 has a 72 in (1,829 mm) deck; Autonomous ZK 61 61G8 has a 61 in (1,549 mm) deck, a 11 in difference. Deck width sets how much grass each pass covers. Mowing time also depends on ground speed, turns and obstacles, so a wider deck alone does not fix the job's length. Time both decks on your own lawn ›
- Autonomous ZK 72 61G8 weighs 1,201 lbs (544.8 kg); Autonomous ZK 61 61G8 weighs 1,310 lbs (594.2 kg), a 109 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Autonomous ZK 72 61G8's weight means for a trailer ›
calculated figures
Calculated by MowerFacts
- Autonomous ZK 72 61G8 works out to 7.3 acres/hour; Autonomous ZK 61 61G8 works out to 6.2 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.
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 | Autonomous ZK 72 61G8 Wright · Commercial |
Autonomous ZK 61 61G8 Wright · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Briggs & Stratton | Briggs & Stratton |
| Displacement | 60.6 ci (993 cc) | 60.6 ci (993 cc) |
| Engine Power | 40 hp | 40 hp |
| Engine Model | 61G8 | 61G8 |
| Fuel Type | Gasoline | Gasoline |
| Start Type | Electric | Electric |
| Deck | ||
| Cutting Width | 72 in (1829 mm) | 61 in (1549 mm) |
| Blades | 3 | 3 |
| Deck Material | 7 Gauge | 7 Gauge |
| Deck Construction | Floating-Mulch | Floating-Mulch |
| Deck Gauge | 7 | 7 |
| Min Cut Height | 1.5 in (38 mm) | 1.5 in (38 mm) |
| Max Cut Height | 5.5 in (140 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | Hydro | Hydro |
| Ground Speed | 12.5 mph | 12.5 mph |
| Reverse Speed | 7 mph | 7 mph |
| Dimensions | ||
| Weight | 1201 lbs (544.8 kg) | 1310 lbs (594.2 kg) |
| Fuel Capacity | 15.5 gal (58.7 L) | 15.5 gal (58.7 L) |
| Length | 72 in (1829 mm) | 70 in (1778 mm) |
Where these models differ, explained
Autonomous ZK 72 61G8: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — wrightmfg.com.
Autonomous ZK 61 61G8: Specs verified against the retailer listing on Jun 6, 2026 — barryspowerequipment.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.