Public education project, Abort67, said it has planned the biggest abortion exposure ever seen in the UK "that cannot be ignored".,
Campaign group Christian Concern works closely alongside the pro-life activist group.
The display called 'Moving Truth' has images of aborted foetuses and will circle Parliament Square and travel up and down Whitehall on Friday.
Ruth Rawlins, Abort67 spokesperson, told Premier she acknowledges that some people may find it offensive.
She said: "We believe people need to see the truth and when people see the truth it can often change minds.
"Abortion advocates have been left unchallenged for too long, hiding the reality of abortion and its tragic effects on both the pre-born child and the mother.
The group said its intention is not to upset people, but to "save lives".
Rawlins said: "[Opposers] are becoming increasingly aware of anti-abortion activity and have been frantically trying to shut down the voice of all those who oppose them. The call for buffer zones is just one example.
"But, they cannot shut down an image showing the outcome of their 'service' that savagely kills children in the womb. People can have opinions, but photographs cannot lie."