I think it depends on wether the engine has been designed/engineered to be reliable for the power it’s capable of producing, as mentioned earlier the 2.0 range were designed by bmw to be reliable at the 28i level of performance.mcbutler wrote: ↑Mon Oct 22, 2018 5:23 pm It's fairly obvious that if you have two identical machines, one producing say 200 BHP and the other producing 300 bhp the more powerful machine has higher stresses to deal with and as a result it would be reasonable to expect a greater failure rate from that machine.
Going back to me earlier comment, why do you think a lambo aventador 700-4 is delivered with 700BHP but it can easily be tuned to well over 800BHP (remembering that Lambo is all about massive supercar performance).
The reason is that lambo know more failures (warranty claims/reputation) will occur as a result. Also why mapping a new motor invalidates any manufacturer's warranty.
So in answer to your question I would say, all things considered yes!!!!!
HOWEVER (there it is) all said and done, it depends how you drive it, we all know that is what counts in the real world.
The engines in the 18i and 20i are the same, so shouldn’t suffer at around 28i levels of performance.
That’s a bit different to tuning other engines beyond their design parameters
Rob