My decades of experience is that Lycomings and Continentals, from 1930s agricultural origins,, whether normally aspirated or injected, can often be a pain to get going (requiring techniques my wife would never master if they were needed to start a car) but once started they keep going and (as PF says above) continuously produce their rated power output.
Contrast that with modern fangled motor cars where I have had various problems with engine management systems over the years which require sophisticated (read expensive) diagnostic equipment to investigate. The last car I could properly get to grips with if it failed to start was my 1974 MGB.