Dont know which one he is talking about. But at KY expo they had a 82v that claim like 70cc.
Prob weighs 395 weight with a big batt.
We had a thread on it back in Oct on chainsaw repair group.
Comes with 20" but will take up to 28" they say.
Greenworks Revolutionizes the World of Chainsaws with the First Ever H.O.G. Saw
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Second paragraph from your link: "With an astounding 4.3 kW superior brushless motor..."
If true, that would be impressive. But the actual Greenworks site does not show any 4.3 kW model, they only show 1.5, 2.7, and 3.4 kW "max power" models, each with "rated power" running roughly 15% below "max power", seemingly indicating they cannot be operated at max power over long periods without tripping a thermal overload on motor or battery. These rated powers are nowhere near 70cc territory, the top model being 2.9 kW ~ 54 cc equivalent.
Moreover, whereas these 50-70cc Stihl's classically run 1.6 - 1.8 kg/kW, the Greenworks 82V units are an insanely bloated 2.7 - 2.8 kg/kw with even the smaller 4Ah battery, not even considering the larger and heavier 6Ah battery mentioned in the article. You're talking an extra 80% (1.8x) weight, which is the single most important factor I consider when choosing any saw of any size.
Note that Greenworks does not disclose whether their weights include the bar, so that may offset a
little of the difference. We all know that all other chainsaw manufacturers list weight of powerhead only on their pro models, as bars are sold separately and interchangeable, usually a dealer-select option. It seems possible that Greenworks may be selling the powerhead/bar as a fixed combo, with no ability to select a different bar size at time of order, indicating their intended market is likely homeowner/occasional user only.