Can you have a twin turbo and a supercharger in a car?
Volkswagon offered a Golf GT in Europe that was known as a twincharger. It featured a centrifugal supercharger designed for low-end torque and a turbocharger. The supercharger provided extra torque for low RPM performance and the turbo activated at higher RPMs. It was supposedly capable of running 130+ MPH while still maintaining 39 MPG.