Altitude. High or low compression better?

#1
Disregarding turbocharged or supercharged engines, which will perform better at altitude, a high or low compression engine?
 
#2
Err......not quite sure, if we're talking modern cars/bikes doesn't the ECM (Engine Control Module - computer) account for variations in atmospheric pressure? Is this the line of questioning your chasing?
 

TheIronDuke

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#3
Boeing-737-Business-Jet.jpg


Dunno about the engines. They are out on the wings.
 
#6
Khardung La! whats an f1 car doing there?!
I rode a mountain bike up there and bloody hard to breathe. Mind you all the Tata trucks seemed to be getting up there ok. The indian army has a VCP on the top
 

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