Those of us that have been around for a while would know that back in the 70's and 80's there was a lot of emphasis on efficiency. No one would have considered a 4 place aircraft with 300 hp like a Cirrus or a 4 place that burns 24 gph such as a Columbia 400. But now it seems all that has gone out the window, thanks to Cirrus and Columbia.
I often wonder what could be done with some older clean designs if efficiency wasn't a factor.
C210 or Bonanza with a 375 hp GTSIO-520 anyone?
C177RG with a 210 engine perhaps,
Anyone elses imagination running wild?