ya but doesnt hp per litre indicate an effiecient motor if it is a higher #? kindof like how BMW can get the same power out of a 4.4l, and it takes chevy (i dont have anything against chevy, just using them as an example) 6.3l to get the same power (sure the BMW engine cost WAY more.....but it shows you that it is more effeicient, it generates less heat but produces more power).
How does it it show it is more efficient. Yes, you get more Hp from a smaller cylinder. HOWEVER, it takes more fuel to do so. You are looking at volumetric efficiency, not overall or even fuel efficiency. That is only one measurement of an engines efficiency.
Couple great examples to counter...
Older Ford Explorer V8 = 20mpg
Older Toyota 4runner = 4 or 6, it still struggles to even get 14mpg
Newer Corvette - 400+hp - 28mpg
Newer Camry - 20mpg.
Chevy V8 has won numerous awards for overall efficiency.
It makes more power per amount of fuel than most other engines.
Yes, it is big volumetrically, but that is why it does what it does. Funny thing is that externally, it is rather small. Weight-wise, it is rather light. Pretty efficient package if you ask me.