Apparently, there are giant chainsaw competitions. These chainsaws are so large that they require a V-8 engine.
In this old clip, the “Predator” broke a world record, slicing through a 30-inch log in 0.88 seconds.
“Some people say that this video has been sped up. Well, it has not,” the uploader says.
A few years ago, an Australian team, Whitlands Engineering, used a V-8 chainsaw to cut through similar-sized logs.
(H/T - Altdriver)