Porsche is the 911, and while the vehicle is still evolving, the addition of the turbocharger in 1975 may go down as the car’s biggest watershed moment. The addition of forced induction elevated the 911 to true supercar levels, as its boosted flat-six made 260 hp, almost 90 more than the standard Carrera. Yes, there were plenty of great 911s made before ’75, but the 930 — known to most as the 911 Turbo — offered a level of speed that was unheard of for the time.