Speed Calculator

This will calculate the speed of your Fiero (or other car) in each gear at a given RPM with each of the available transmissions.

The following fields can be edited:
  • Shifting Engine RPM
  • Tire Size
  • All gear ratios
  • Cruising Speed

Select your transmission from the drop-down menu in one of the tables.  Select other transmissions in the other tables with which to compare it.

Speed = Your speed in that gear at the Shifting Engine RPM you entered.
RPM = Your RPM after shifting from the previous gear at the Shifting Engine RPM you entered.

Shifting Engine RPM Tire Size (metric) Tire Diameter (inches)
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Transmission 1
Final
First Speed: 
 
Second Speed: 
RPM: 
Third Speed: 
RPM: 
Fourth Speed: 
RPM: 
Fifth Speed: 
RPM: 
Sixth Speed: 
RPM: 
Cruising Speed
 MPH at  RPM
Include in graph
Transmission 2
Final
First Speed: 
 
Second Speed: 
RPM: 
Third Speed: 
RPM: 
Fourth Speed: 
RPM: 
Fifth Speed: 
RPM: 
Sixth
Speed: 
RPM: 
Cruising Speed
 MPH at  RPM
Include in graph
Transmission 3
Final
First Speed: 
 
Second Speed: 
RPM: 
Third Speed: 
RPM: 
Fourth Speed: 
RPM: 
Fifth Speed: 
RPM: 
Sixth Speed: 
RPM: 
Cruising Speed
 MPH at  RPM
Include in graph