New engine design with >60% thermal efficiency generating 160hp and 170ft-lbs torque weighing only 35 lbs. The actual engine is shown at 9:00 min, with a list of benefits after that.
Could be a great engine for hybrids, given it is air cooled and doesn't need much exhaust, so takes up far less space.
Here's an article on it:
https://www.topspeed.com/cars/car-ne...60-horsepower/