Bassie and Adriaan arrive at the airport at 11:02. They then drive to Pesaro, which is about 300 km away and takes 3 hours according to Adriaan. This means their scooters reach up to 100 km/h, which is not possible. They then drive back to Rome and arrive at the airport at 11:22, so all this took just 20 minutes.
Adriaan tells Bassie that Julius Caesar was the emperor of the Roman Empire. However, during Caesar's lifetime, the title of emperor wasn't created yet. The closest thing to a monarch Caesar became was a dictator (special emergency ruler) for life.