Well, in a sense, it can, at a price...
I am not so sure. The thought of filling up for a couple of quid is attractive, and lets face it, it need not be every night.
I think not Dave.
Not the engine itself. Definitely lighter vehicles though, and better management of power. But these are only stopgaps.
The physics of heat engines make it hard to exceed more than 50% efficiency even in a huge stationary heat engine like a power station.
I've been over and oer this in my mind, and done a fair bit of research.
And teh answres are starng you in teh face. the ONLY technology that makes sens right now, to be ready in 10-15 years tme, is LIPO battery vehicles and nuclear generating sets.
Plus a smattering of hydrogen where extreme energy density and portability is needed.
And probably a bit of biodiesel to run the war machines on.