A lot of German cars will have a different reading on the speedo for you to see, in comparison to the vehicle speed that the ECM sees.

Porsche is infamous for this, for example.

Above 10 mph, by Boxster has a 4 mph speedo reading above what the car's computers are actually determining from the transmission input, and the wheel speed sensors.

You can actually hook up a diagnostics tool to the car, and read the actual speed reading, and see its 4 mph off anytime you choose. You can actually pull up the various sensor data using the HVAC controls in the car, and see the difference that way, too. (yes, its pretty cool being able to pull up different sensor data right on the hvac controls).

So yes, I would imagine that you would be able to get the speedo to read 160 on a Crossfire, before hitting the speed limiter.

BC.