There's something wrong with the math here. 100 km/s delta-V means you go from standstill to 100 km/s. Solar system's escape velocity is 42 km/s at Earth's orbit. By the very definition, any A->B travel for any A and B within the solar system, requires less delta-V if Hoffman's orbits are used.
In reality the delta-V for Earth_surface -> Mars_surface journey is between 19 and 21 km/s (depending on the relative position of the two bodies) for Hoffman's orbits. Without using aerobreaking. If using aerobreaking, it's less by about 3-4km/s [1]
In reality the delta-V for Earth_surface -> Mars_surface journey is between 19 and 21 km/s (depending on the relative position of the two bodies) for Hoffman's orbits. Without using aerobreaking. If using aerobreaking, it's less by about 3-4km/s [1]
http://en.wikipedia.org/wiki/Delta-v_budget