>>13661220So much depends on so many variables. We can make an arbitrarily large tank of rocket fuel and add engines to it. But how fast does it accelerate? How many stages? What is the density of fuel? Does it have a heatshield? What kind of payload does it carry? Is it constructed in space or on Earth?
It's like making a building: you can make a reinforced concrete column many times larger than the Burj Khalifa, but rooms, elevators, service corridors, wiring, air conditioning, windows, wind, and the bedrock all limit what you can make.