Hello Vaux Friends!
There in Europe have 2.4 4cil engine? Here in Brazil have. Is the same block of 1.8/2.0/2.2 Vaux engine, but with 87.5mm of bore, and 100mm of stroke.
Then, my friend have a Vectra 2.2 16V, and he's think in put the crankshaft of 2.4(100mm) for make more power. What you think about this? Make much vibration in high rpm because the tall stroke?
In yours opinion, the best engine for Vectra is 4cil or V6?