Fred, Corvairs have 6 cylinders. 80HP 140CID in 60; 145CID, 80HP to the 150HP Turbo Spyder from 61-64; 164CID, 95HP to the 180HP Turbo Corsa 65-69 (66 last year for the turbo). A very nice car, well ahead of it's time, and a blast to drive. But we'll go to the Corvair page for more of this.