As of this writing, Ford's 1.0-liter EcoBoost with 136 hp (101 kW) is the most powerful three-cylinder you can buy. 

However, this won't be the case for very long because the Fiesta ST will be available in Europe very, very soon. Its 1.5-liter three-cylinder will raise the bar even further in the Blue Oval's favor by pumping out 197 hp (147 kW).