The standard double car garage door is 16' wide x 7' high. A two car garage should typically be a minimum of 20' wide (inside) to allow the doors to open. 22' to 24' width is preferred.
a little wider than 2 cars
That would depend on the length and width of the garage multiply the length by the width and the answer to that equation will be the Sqare Metres
Drive in the garage.
These lifts are designed to lift a car with ease - they are machines and require a power supply and that varies by manufacturer. the main selling point of a car lift is that it can "double your space) in your garage by lifting you car up on something that looks like a bunk bed.
Twice the size of a single garage.
The standard width of a double car garage is 20.5 feet. That is a big enough size to fit a large sedan and a truck inside.
Normal width of a single car garage is 8' feet. Normal width of a double car garage is 16' feet. These answers are for doors typically found in the USA.
The average with of an one car garage is 12 feet. Many people will want a few extra feet of width for storage.
20 feet
Generally 8' or 9'
a little wider than 2 cars
Typically, a 2 car garage minimum width is 24'. This said, there is no reference to minimum widths for garages in the IRC building code that I can find.
A standard 2 car garage is 24 ft x 24 ft. So you would double that for a four car garage.
You'll need to get a nonstandard garage door (not single-car width), so that may be very hard to find.
Sixty feet is a good size width for a 3 car garage. This comes from the Illustrated Guide to Tactical Drawing: How to Determine Floorplans. It calculates the size of the cars with doors open and adequate space to walk between vehicles.
8 or 9 foot, either one is common.
Most are mot big enough and most are around 24x22. A much better size for a 2 car garage is 30x28.