MORE POWERFUL THAN EVER The new Vespa GTS Super is powered by the latest evolution of the single-cylinder 4-stroke 300 cc engine with 4 valves, liquid-cooling and electronic injection. The 300 HPOE (High Performance Engine) is the most powerful engine ever installed in a Vespa, delivering improved performance and reduced fuel consumption. With a maximum power of 17.5 kW (23.8 CV) at 8250 rpm, gear changes are incredibly smooth, no matter what the speed.