All the large Buicks of 41 had an optional compound carb setup avai;able , not just the Century. It was the carb option that I was refering to not be available after the war. For the poster who said a lot of 1930s European cars would top 100mph. I would like to say tjat there were a lot of 30s and even some 20s American cars that would do it. That changed when they stopped when they stopped making Duesenbergs, Marmons, Auburns,Cords, Pierce Arrows. and I imagine a lot of 12 cylinder Packards and 12 and 16 cylinder Caddies plus other cars I have forgotten or don't know about. I learned to drive on a 41 Century with compound carbs, I don't know what had been done to it but in 51 and 52 when we had it , It idled smoothe as silk and was still on of the faster cars on the road. There is nothing inherently more powerful about a V8 than a straight eight and the straight eight always has better balance and less vibration.