2017 Alfa Romeo 4C Prices, Reviews and Pictures The 2017 Alfa Romeo 4C is powered by a 1.8L turbocharged 4-cylinder engine, which is mounted behind the cockpit, in the tradition of the best Italian sports cars. The engine is capable of producing 237 horsepower and 258 pound-feet of torque. While that may seem rather modest for a sports car of this caliber, Alfa Romeo claims that the 4C is still capable of 0-60 times in about 4.5 seconds, with a top speed of 160 mph. The only transmission available is a 6-speed dual-clutch unit with paddle shifters.