Mile-High Test of Mazda Miata vs. Turbo Fiat 124 Spider Abarth
 

Apparently Turbos are not better at altitudes. Watch the video from Torque News.

"A new comparison of the Mazda Miata with its lower-power normally aspirated engine vs. the higher power turbocharged Fiat 124 Spider Abarth counters the idea that turbos are better at altitude."

https://www.torquenews.com/1083/myth...urbo-advantage