Honda built a mower mating a Honda HF2620 mower, a VTR 1000cc motorcycle engine. The results are a lawnmower that has 110 bhp, 0-60 mph time in four seconds and blades that spin at 4,000 rpm.
Lawnmower racing began in America in 1963 at the The Twelve Mile 500 in Twelve Mile, Indiana, organized by the Twelve Mile Lions Club and occurring annually on Independence Day. The tradition began in 1963 as a race for factory-built mowers with their mowing decks removed but in 1996 split into a two-race event with one for four-cycle Briggs lawn mowers and another for modified mowers.
Lawnmower racing began in TopGear’s England in 1973.
Unfortunately Honda’s entry into lawnmower racing has been disqualified for being too modified.
Read more about the build at TopGear or BBC: Honda races to build speedy lawnmower for Top Gear team. Or Read about Satan’s lawnmower that is for sale.