To me the actual top speed is not the issue, is it what you do with the limits that defines the quality/skill of the entrants. Is it important to go as fast as the electrics, or is it more important to use engineering skills to make the best of what you have available (which seems more real world)? Curious.
I only say this because of the diverse assortment of .45-.46 size engines on the market, versus .55, which makes me wonder is is restrictive or counterproductive to bump to a displacement size that has fewer offerings in the marketplace.