Speeding Car

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The pair was arrested for speeding on the N1 to Pretoria on Sunday and released on bail.

Spokeswoman Busaphi Nxumalo said the 55-year-old father was caught shortly before 7am driving at 234km/h in a Porsche GT3.

"His 20-year-old son, who is an Olympic swimmer for South Africa, also driving the same make of Porsche, was caught behind him travelling at 188km/h."

Nxumalo said the two were arrested for reckless or negligent driving, with an alternative charge of exceeding the general speed limit of 120km/h.