Cars and Design | While the GT’s V-6 delivers supercar thrust, a car with looks and moves that can snap necks deserves the aural drama of eight, 10, or 12 cylinders. The EcoBoost engine’s soundtrack is loud and deep, but it’s a thrum, not a bark or a scream, with no fire and brimstone raining from the exhaust. The GT’s engine sounds awesome for a V-6 Fusion but restrained for a 647-hp supercar. That’s the downside to making your power with six pots muffled by two turbochargers, but Ford landed on that configuration, it says, specifically for the fuel-economy benefit in the race car. And, no doubt, the marketing traction the EcoBoost association buys.