The examples being lets say BMW E46 M3 and the new BMW G80 M3. The E46 has a 3.2 i6 NA that makes 338hp, the G80 M3 has a 3.0 i6 twin turbo that makes 510hp.
What technological advancements have been made, other than the turbos and 20 years, that separate these 2 cars?
If you know something really technical feel free to share.
Direct injection probably… but I don’t know if the E46 had that as well. Usually direct injection was reserved for diesel engines because of the extremely high fuel pump pressures needed.
Direct injection allows more even fuel air mixture for complete combustion and to prevent detonation as well as cooling air over the exhaust valves (since fuel is only sprayed in directly before combustion and the turbo will quickly push the combustion gasses out from the previous cycle).
The fact that it has 9.3:1 compression ratio plus turbos seems to indicate very high brake mean effective pressure which translates to power.