How much horsepower does a 2020 Alfa Romeo Spider have? How fast is the 2020 Alfa Romeo 4C Spider? The 2020 4C Spider boasts 237 horsepower. The 2020 Alfa Romeo 4C Spider recorded a top speed of 160 mph.Production of the first generation Alfa Romeo Spider spanned from 1966 to 1993, and amounted to 124,104 […]