Google isn't making a car, iirc they've said they're going to license the technology. On the other hand Apple does seem to be seriously interested in make its own cars and is hiring people. The information isn't that interesting either, the most likely use would be applications to help people, but invariably car makers feel that the vehicles are appliances and that they should be able to charge customers for information about their own vehicle.
The problem with rumors is that the conclusions that come out of them are not always the best. The last time I heard that Apple was releasing an electric car, it was because Apple engineers met with Elon Musk about something. Which sounds plausible until you think about whether Elon Musk would help Apple compete with him. Then Apple announced CarPlay. Now the rumors again are that Apple is releasing an electric car. This time, they have "hundreds" of people working on a car according to other rumors. My guess: Apple is working on a car that does street mapping like Google has had for years.