Adding a turbocharger to your car can increase its horsepower, which in turn can improve its acceleration and top speed. The exact increase in speed would depend on various factors, including the specific characteristics of your car, the type of turbocharger, and any other modifications made to the vehicle.

How much horsepower does a turbocharger add? A turbo can boost an engine's horsepower by 30 to 40 percent or approximately 70 to 150 HP.