Horsepower Efficiency Calculator

 

The old "Horsepower per cubic inch" standard is outdated and useless in figuring out how efficient a motor is, you can pump more fuel in any motor and make more horsepower.

This calculator was developed to determine actual efficiency of a motor and the car it's in based on the HP/MPG ratio of the motor.

Please note that a heavier car is going to be slightly less efficient than the lighter car, this calculator only figures the entire motor/car package.

 

Simply enter the Car type, horsepower and MPG figures to obtain your HEN number.

If you need HP or MPG Figures for your car you can click on some of the button links below

 

US Autos MPG Lookup (EPA)Horsepower LookupKelley Blue Book HP and MPG Edmonds HP & MPGMotortrend HP & MPG

 

US & Imp

If you have metric mileage values, enter them in the appropriate box and click the conversion button to convert to Miles per Gallon (US)
US MPG L/100km Imp. MPG km/litre

 

 
Car Type & Model Horsepower (US) Miles per Gallon (US) Horsepower Efficiency Number (HEN) Cars ranked high to low according to HEN number

Horsepower Efficiency Calculator650 Kawasaki powered Go-CartFuel Injector size CalculatorItems For Sale'57 Chevy 8 Second street car'29 Chevy Blown & Injected PickupRWD Z-24 Cav / 350 Tuned PortDrawings 'n StuffEFI Links PageBlower injector plate parts linksHome PageE-mail

 

Here's links to 3 excel files that I used to create my calculator, if someone wants to put a similar chart on their site feel free to either copy my html and use it or make their own chart from my excel files.

HEN RankingHEN SortingHEN + Chart