Quote:
Originally Posted by Jawnathin
. The rotary is a good example of a case where both its HP/L and volume or weight/hp were good (and even remarkable) but had issues elsewhere which were compromises.
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Your whole point is good but your example is wrong. The Rotary engine 3 phase/stage/cycle which are the Intake, compression/ignition and Exhaust. If they say 1.3L displacement, it is not. It is actually 1.3L x 3 = 3.9L (at least arguably).. The 3 phase/stage/cycle happens all at the same time. Unlike in a regular engine, it will only be doing 1 phase/stage/cycle at a time.
So a 3.9L making 255hp is OK but not the greatest.
TL;DR.. a displacement in Rotary/wankel engine does not equate or reperesent the regular 4 stroke engine displacement.. (at least arguably)