This is true: all modern engines regardless of the design or number of cylinders (L4, L6, V6, V8) have piston and crankshaft throw in pairs, in which one is @ TDC on compression (both valves closed) and its partner is @ TDC on overlap (both valve open). The other pairs also operate in tandem but leading/following by 720 degrees divided by the number of cylinders: 4 cylinder = 180 degrees, 6 cylinder = 120 degrees, 8 cylinder = 90 degrees.
The only difference among engines is which cylinders are paired.
