Ford has installed a four-cylinder engine for the first time in many years, but it's also worked on aerodynamics--such as active grille shutters. When it arrives, the 2.3-liter EcoBoost model will ... more 
Ford has installed a four-cylinder engine for the first time in many years, but it's also worked on aerodynamics--such as active grille shutters. When it arrives, the 2.3-liter EcoBoost model will play a middle ground between the thumping V-8 and entry-level V-6 models. The turbocharged engine needs more cooling air than atmospheric engines, so Ford has opened up greater space behind the grille to allow this air to filter through. The problem is a large grille like the Mustang's can act as a bit of a parachute, harming the car's aerodynamics. less 
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Wochit
Fri, Feb 28, 2014 9:20 AM EST