Unless you manually start your engine with a hand crank, all cars for decades have had motors in them. You know, the starter motor. It runs off the battery, and cranks the engine for you.
My 1956 Triumph TR-3 had a hand crank in the trunk, to start up when the battery went flat. I miss that car!
But he is right. They often are referred to as motors. In the old days, and I do mean OLD, prior to Kettering’s Cadillac starter system of 1912, they were often called “motor cars” and there was a magazine called “Motor Age”. It did not mean just electric. And of course, Motor Trend.
This is something of an exclusive categorization issue.
An engine is always a motor, but a motor is not necessarily an engine.