I'm quite amazed and thankful for the advances in motoring technology that we consumers benefit with petrol engines having a very healthy power output for a given capacity compared to 3 decades ago. In mid 80's a common 2lit engine would be at 70-80kw at best, with 1.3lit at somewhere 40-50kW. Today, a 2lit car (normally aspirated) can output 100Kw. The BMW engine of the 80's was among the very few that could achieve that with its 1st-2nd generation EFI and with 6 cylinders. Now the common NA engine at 1300cc armed with VVT, dual cams, full EFI, and what have you, can equal or surpass a 1800cc engine of the 80's and 90's, not to mention more efficient fuel consumption. I was quite surprised that some vital and traditional engine components can even be done away that would contribute to adding to power output. Two of those are the ignition distributor, (FULL electronic ignition) and power steering pump. I wonder what else the designers can omit... air con compressor I hope..
This is a very very good sign that the petrol engine have come of age. I wonder if in 2030, a normally aspirated 1300cc engine could output 100kW or we'd be realizing fully electric or hybrid engine technology for obvious reasons. However, I reckon more powerful gasoline engines will still be further developed and in production indefinitely because motor racing seems to be an everlasting sports event.