Slightly off topic, but I remember many years ago on Tomorrow's World they were showing an engine the size of a box of cornflakes which was supposedly very cheap efficient and easy to replace. Can't remember much more than that, except that it was never seen again. So was it a flight of fancy or did it exsist and was buried by the big manufacturers??
Thinkk that may have been the Sterling ( or is it Stirlng). There are a few ICE engines in development making big claims.
Hybrid
Imagine scenario of driving through Europe at 85 mph in any hybrid...( or 130 kmh)
Both systems would need to be in operation..infact totally negating the whole point of hybrid.
Cant see point of dragging a battery / electric motor when you are actually totally dependant on having an ICE to do work. It does not make any sense from any physics point of view. Yes short journeys , commencing with charged battery and hybrid simply extends range but in real world ( ie long journeys) you are simply carrying a battery/ motor around for nothing.
A car must be able to operate at a steady state. BMW and government ate conning us about Hybrids. It can not be as efficient at steady state, its simply introducing an other inefficiency ( albeit high one)
Take two cars on a 1000 mile drive. One a hybrid using small motor running all time to keep battery charged for inclines etc and another with just an efficient ICE the latter will always be more efficient.
How does introducing more weight, a charging system, a large electric motor into a car possibly make it more efficient. Simple fact is, it does not.
A car consumes so much energy pushing it through air and climbing hills. That energy in long journeys must be supplied by the ICE ( even on hybrid) . The Hybrid part simply introduces more weight, expense, inefficiency and expense. Thinking otherwise not taking account of the physics involved.
The only question is at what point do journeys become long? If you are always doing short journeys, perhaps Hybrid might compete..Read Clarkson, I know he,s a pain but he talks sense on this matter.