Some months ago a friend of mine bought an RX-7. I was interested by the particular engine, and I searched for its characteristics.
I realized that the 13B engine has a displacement of 3.9 L, and that almost everyone it is been fooled by Mazda saying it is a 1.3 L.
I recently had few discussions about it on youtube. An user suggested me to write here. So, here I am.
I think I will open a thread to explain the concept.

 

.....1308cc....