Not sure if you figured out the answer from FA's response.
Take off the the air cleaner and see how many ports (or upright tubes) their are, 2 or 4.
4 barrels provide the oomph when you stomp the gas pedal.
They also suck gas real quick (while stomping).
If you're looking at an older carbourated vehicle, and you're a young buck, get the mechanic to check it out.
Or get a nice sedate fuel injected Corolla and cruise serenely but slowly.
Hope this is of some help.
What are you looking at?