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Good to have stretch goals. EV have stretch goals too, as do battery tech designers and power generation and storage. So.. given this is a 25 year stretch goal, what will EV look like then? I think we can predict they will be better than this 57% heat efficiency or not.

I like phev as an interim, but Mazda have to invest now to have a story in phev. This incredible goal in ice engine efficiency could be part of that.

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what kind of heat efficiency you mean?

The Carnot heat engine efficiency. That's what the 57% is talking about in the proposed improvements Mazda are projecting. Getting a single F1 engine there for a circuit is one thing. Getting a road car under varying driven conditions there, on a production line.. that's another. If the 57% was demonstrated they'd have said a deadline inside 25 years. If they project out more than Five, it's a bet, not a certainty.

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