Quote:
Originally Posted by cRiPpLe_rOoStEr
Just dropping the compression ratio to such a low level wouldn't work without the advances regarding injection management.
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It's more the variable exhaust valve timing in this particular engine that allows it, allowing hot exhaust from the manifold back into the cylinder during the intake stroke to preheat the cylinder.
Injection management hasn't changed much since common rail became mainstream 10 years ago.