Prosecutor Charles Judge said the incident started when Turnage, who was riding his motorbike, saw men cycling in the nude as part of the World Naked Bike Ride event.
Turnage, who was not insured to drive his motorcycle, then turned around and rode back up the hill before he punched the cyclist in the head.
Mr Judge said: 'Fortunately, although suffering cuts to his legs, grazing to his hands, arm, and hand, bearing in mind the force at which he was struck, he did not strike his head which would have caused more serious injuries.'
Another cyclist sent footage of incident to the police, who later attended The Leather Bottle pub and found a helmet and backpack belonging to Turnage.
When the officer seized the items, Turnage approached them and said, 'You're not taking that'.
Turnage then attacked one of the officers, putting them in a headlock, kicking them in the abdomen, and damaging their glasses.
A second officer tried to restrain Turnage while onlookers, including children, watched on.
Mr Judge said: 'PC Jenny Ham was taken to the floor and described being terrified for her safety and her colleague.
'Other officers attended and saw PC Charlie Jones being attended to because his ear was torn - his ear was glued to repair that particular damage.'
Turnage, of Colchester, admitted one charge each of dangerous driving, driving without insurance, criminal damage, and assaulting a police officer.
He also admitted two charges of actual bodily harm.
Recorder Jeremy Benson sentenced Turnage to a total of 14 months in prison, suspended for two years on Monday.
Turnage was also ordered to carry out 15 rehabilitation days, 75 hours of unpaid work and pay £2,000 in compensation to the cyclist.
Turnage had his licence revoked for the driving offences and was ordered to pay a further £200 fine.