1.5 L Dragon On 24 February 2017, as part of the unveiling of the seventh generation (Mk8 - UK) derived Fiesta ST, Ford announced an all-new aluminum inline 3-cylinder 1.5 L EcoBoost engine with cylinder deactivation technology.[21] The version of this engine announced for the Fiesta ST produces 200 PS (147 kW, 197 hp) at 6,000 rpm and delivers 290 Nm (214 lb ft) of torque from 1,600 to 4,000 rpm.[22]
The engine is based on an expansion of the 1.0 EcoBoost, taking the capacity per cylinder up to 500cc which Ford consider is likely to be the maximum for optimum thermal efficiency.[23] The engine is an all-aluminum design with integrated exhaust manifold and combines both port fuel injection and direct fuel injection.
The engine will be available with cylinder deactivation technology, implemented by stopping fuel delivery and valve operation for one of the engine's cylinders in conditions where full capacity is not needed.