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Car Power to Weight Ratio Calculator
Power to Weight Ratio may be used as an indicator of car engine performance.

For example the maximum horsepower of a vehicle is 190 hp and its weight is 3518 lbs. This gives a power to weight ratio of 0.054.
Power - hp
Weight - lbs
Power to Weight Ratio
       
Further Reading:
Piston Speed Formula
1/4 Mile Horsepower Calculator

Auto Math Handbook, J Lawlor, ISBN-13: 978-1557880208.