Perhaps wide and flatter to allow for easy access, and up higher in the engine bay? As to “why don’t we have that” - I think that by doing that you’d throw off

Perhaps wide and flatter to allow for easy access, and up higher in the engine bay? As to “why don’t we have that” - I think that by doing that you’d throw off the center of gravity, because an engine is made out of heavy strong metal to withstand the pressures it generates.