Elite Dangerous: Speed vs collision damage

Speed m/s	Lightweight	Hull Reinforcement C5	Mirrored
100	42	26	20
110	51	31	25
120	60	36	31
130	70	43	37

Ramming was done in Asp Explorer at exactly same mass - 425 tonnes. Class 5 hull reinforcement provides with 40% damage protection against collisions while Mirrored armor around 50%. In this table you can see comparison between Lightweight, Mirrored and class 5 hull reinforcement package.

At 130m/s with lightweight armor you will receive 70% damage, with C5 hull reinforcement - 43 but with mirrored only 37%.