I use a 15 litre compressor (SiP I think).
It’s fine for inflation and running low consumption tools but anything needing a decent continuous feed (die grinders, sanders and most spray guns) need a higher CFM than it will deliver.
Ask yourself what other jobs you’ll use it for – if it’s just doing bike tyres and the occasional top up of the car tyres then it’s a reasonable (if noisy solution). Also, if you’re going to use other tools they may need oil added to the air to lubricate the tools – you’ll need separate feeds for tyres and tools if you go down that route so look for a compressor with more than one outlet.
Also look at getting a long extension for the air supply – I have one that means I don;t need to move the compressor to use it for tyres, compressors are fairly heavy and awkward to carry and bloody noisy right by your ear.