The 1991 Toyota Previa typically comes with 4-inch speakers in the front doors and 6x9-inch speakers in the rear. These sizes can vary slightly based on the specific trim and any aftermarket modifications. It's always a good idea to check the vehicle's manual or consult with a specialist for precise information.
it has a 2.4li engine size for gasoline
4 ohms
If you have 15" inch rims, the default factory tire size is p215/70.
4 inches.
what size speakers fit in a 1989 Toyota cressida
http://www.crutchfield.com/S-l0G528SJU6X/app/car/mycar.aspx
6" speakers in a 2000 Toyota camery
For the front two speakers, you'll need 4". The back two are 5 1/4".
5.5" speakers front and back.
I own and drive a 96 Previa and was amazed to find out the capacity is 19.8 gallons US . (according to Alldata online)
An educated guess: 5 1/2 inch round - this is the case in my 1992 Corolla.
All the door speakers are 4' in size for replacement.