[Tervuren]

I would recommend asymmetrical.

Cars tend to have a weight bias one way or the other, put the heavy end on the short side of the lift, the light end on the far side of the lift.

This will create a more balanced load than a symmetrical lift.

Especially with FWD cars, or a vintage 911 with it's rear bias.(Park it backwards from the FWD).

I have all front heavy cars, my lift has the short side deep in the garage so I drive in forwards into the lift. With a 911 I would back in.

If I had all 911's I would have installed the lift backwards with the long arms to the back wall of the garage.