A 56-year-old man arrested on suspicion of causing death by dangerous driving has been bailed.
He was driving a Peugeot 307 which collided with a 79-year old man on Selsdon Park Road near the junction with Farnborough Avenue at 9am on Saturday (August 23).
The pedestrian was taken by London Ambulance Service (LAS) to St George's Hospital, in Tooting, but was pronounced dead shortly after arrival.
The 59-year-old was questioned in custody before being released on bail until December 15.
Officers from the Road Death Investigation Unit, based at Catford, are investigating the incident.
An inquest into the death of the pensioner is due to open at Croydon Coroners' Court on Tuesday (September 2).