Police Scotland said a 36-year-old man had been reported to the procurator fiscal and is likely to face an automatic ban.
Road Policing Scotland tweeted at 7:56 pm on Saturday: “#AyrshireRP conducted a speed check on the #A78 today. This driver almost flew past them at 148mph.”
The tweet included a picture showing the speed recorded on the police speed detector.
And it added: “Nice weather doesn’t mean you can drive at these ridiculous speeds. You never know where our next speed check will be.”