I would suggest you look at their posted hours and then subtract your estimate of time you will spend there. I would not think of less than two hours.

The museum’s collection of cars is not strictly “race cars”. If you enjoy viewing “historic and classic” cars, you should find this place to be interesting enough. Be forewarned that the area where the museum is located does not offer restaurants. It’s kind of like the outskirts of an airport (industrial). TIP — try to go on a Saturday if you can. Dr Simeone himself is there and he talks about the cars and takes out a few cars and demonstrates them in the parking lot. Go to their website and look up Demo Days

2-21/2 hours

There's no extra admission charge those day. There are usually 3 or 4 cars chosen from the collection that have something in common. Dr. Simeone discusses their significance and then the cars are started and run around the back of the lot. Visitors are encouraged to get close to inspect and photograph the cars.

Hello and thank you for contacting us. We do not have a hotel at our facility, but we recommend the Hampton Inn which is nearby. Thanks and please let us know if we can help you with your visit to the Museum.

I drove there, but I think you can take the trolley 36 (subway-surface, Westbound) from Center City or 30th Street, and then walk. Check the route on the SEPTA website, it's very good. It is out of the way, but worth it!