[aerohead]

Here are some quanta which I hope will come in handy for members and guests as you navigate between internal combustion, and electrified propulsion:
* REGULAR Unleaded E10 gasoline = 111,836 Btu/ gallon
* 32.7772 kWh/ gallon-e
* 6.138-pounds/ gallon
--------------------------------------------------------------------------------------
* DIESEL fuel = 136,775 Btu / gallon
* 40.086 kWh/ gallon-e
* 7.1089-pounds / gallon
--------------------------------------------------------------------------------------
* 35% thermal efficiency for ICE gasoline engine, 65% waste heat
* 43% thermal efficiency for ICE diesel engine, 57% waste heat
* 90% thermal efficiency for electric motor, 10% waste heat

--------------------------------------------------------------------------------------
* 746-Watts / horsepower
* 3412- Btu / kWh
* 2456- Btu / hour / horsepower
------------------------------------------------------------------------------------
* 1- meter-squared = 10.76391 square-feet area
* 25.4mm = 1-inch
-------------------------------------------------------------------------------------
* engine-driven accessories = 2% power loss
* Planetary gearset = 99.5% mechanical efficiency
* spur gear set = 99.0- 99.8% mechanical efficiency
* hypoid gearset = 90.0- 93.0% mechanical efficiency
* automotive manual transmission = 92.0-97% mechanical efficiency
* automotive automatic transmission = 90.0-95% mechanical efficiency
* CVT mechanical transmission = 87.0-86% mechanical efficiency
* CVT hydrostatic transmission = 80-86% mechanical efficiency
* Driveshaft ( double- universal joints )= 98% mechanical efficiency
* Rear differential & wheel bearings = 97% mechanical efficiency
-------------------------------------------------------------------------------------
as above, here at the aero forum,
* aerodynamic forces vary as the square of the velocity
* aerodynamic power requirements vary as the cube of the velocity
* aerodynamic data are normalized to reflect SAE 'standard' air density ( rho )
* Use published Cd and Projected Frontal Area if available, otherwise, you're forced to estimate frontal area as a percentage of Width X Height, compared to a vehicle of known frontal area, similar in architecture. Drag coefficients are easier to come by, although some have never, ever, been provided.
* rolling-resistance varies arithmetically with velocity, up to standing-wave ( which occurs above the rated speed rating of any given tire )
------------------------------------------------------------------------------------
* Presently, in the United States, the highest legal driving speed is 85-mph, on the toll road between Austin ,Texas, and San Antonio, Texas.
--------------------------------------------------------------------------------------
Unit conversion tools are easily available online