These early Chryslers are beautifully made, robust, high quality cars with many interesting engineering features.
I have a 1924 B70 Phaeton and a comfortable cruising speed is 45 - 50 MPH. The 1920's era chassis dynamics, brakes, and aerodynamics start to feel a bit uncomfortable faster than that but I have no doubt that the car would do the claimed 70 MPH top speed.