When the hairdresser is leaving the orphanage after she returned Cyrill's bike the car she is driving makes the sound of Diesel engine, but in the next scene with the same car the car sounds like it has a petrol engine.
After meeting Cyril's dad at the restaurant, Samantha and Cyril get in a car with horizontal AC vents. They get out of the car to meet him again. This time they get back in a car with AC vents circular in shape.