> Even in the world of PEV there is a trade off between fuel economy and performance, so this has nothing to do with transmissions. CVTs are not efficient beca

> Even in the world of PEV there is a trade off between fuel economy and performance, so this has nothing to do with transmissions. CVTs are not efficient because they control the rate of acceleration. You can over-rev a CVT and get as much acceleration as your engine (and it's transmissions losses) will allow. CVTs are efficient because they allow the engine of the car to operate in its most efficient power range more of the time. EVs run into this same issue, but the way Tesla anyhow solved for it is pretty wild. Dual motor Teslas have 2 different motor/ drivetrain gear ratios. The rear wheels are most efficient at lower speeds and when you are driving slower, they get most of the power. The front wheels are most efficient at higher speeds and when you are driving faster, they get the most power. This way the most efficient motor is always doing the most work at any time. This is likely why the AWD Teslas have so much more range than the single engine/ RWD models. There is a good article talking about EV transmissions here, the bit about Tesla's 2 gear ratio setup is about 12 paragraphs in. https://cleantechnica.com/2019/07/22/ev-transmissions-are-coming-and-its-a-good-thing/ https://cleantechnica.com/2019/07/22/ev-transmissions-are-co...