There are 12 cylinders in the V12 under the hood of my 2005 Aston Martin DB9, but I couldn’t find any reference to tell me which cylinder was number 1, and which was number 12.   Does it criss-cross left to right, right to left, or something else?  I scoured the official Aston Martin Workshop Manual – nothing (which is just plain dumb since they reference cylinder numbers within the manual).  I asked on the usual online forums and got a variety of kind guesses from a few people trying to help, and at the same time heard a chorus of people asking the same question.  You know me, this set me on a mission to find out! Continue reading “Aston Martin V12 Engine Cylinder Numbering” →