[john70t]

The M1A1 tank has a turbine-electric drive but is a fuel hog with limited range. Granted, there are a few extra pounds of armor and weapons on that. Using that engine with electric assist in common daily driver transportation might or might not be beneficial. It it purely drove a generator it could be fine-tuned into something very efficient and even have cross-platform uses. idk.

It's efficiency might be "disruptive technology" to the existing otto-cycle industry. There are variable piston height(ie compression ratio) designs out there waiting to be used. The electric motor as a plate configuration instead of a cylinder is infinitely more efficient (think breaker bar). I always wanted to see lightweight dual opposing pistons and rotary valves. The perfect combustion chamber might exist yet. The rest of the power plant just has to be designed around it.