The 2021 Spyder RTs are powered by a 1330cc Rotax engine with 115 claimed horsepower. That’s an adequate amount, but the Spyder RT is not a scorcher, given that it weighs over 1,000 pounds when gassed up. The onset of power is smooth and predictable with the majority of the punch delivered in the low- and midrange. The engine is designed to be low maintenance, which is excellent for a machine intended for munching miles.