**Between engine output and the wheels cars lose an estimated 15% of their power on average. Electric vehicles do better.** In addition to [[I.C. Engines Efficiencies]] not being great, a standard (non-electric) vehicle loses about **15%** of the energy output by its engine to internal resistance by the time that energy makes it to the tires on the road. I saw this figure in several places. The first listed out the losses at major components piece by piece (Driveshaft, Differential, Propeller Shaft, Gearbox, and gear mesh). # Electric are Better Electric vehicles are much less complicate. Less going on ⇒ less losses in all that stuff. This is a Tesla Model S drivetrain. ![[assetsUntitled]] **** # More ## Source [https://www.motortrend.com/how-to/modp-1005-drivetrain-power-loss/](https://www.motortrend.com/how-to/modp-1005-drivetrain-power-loss/) [Drivetrain losses (efficiency)](https://x-engineer.org/drivetrain-losses-efficiency/) [McNally](https://www.mcnallyinstitute.com/how-much-horsepower-is-lost-from-engine-to-wheels/) ## Related - [[I.C. Engines Efficiencies]]