I use an aircompressor for farm work. We need at least 12cfm, and a decent sized receiver of around 150 litres. We can't use electricity so we have a diesel powered compressor which cost us £400. I think your £150 budget is way too low for the use that you want get from the compressor.
I think you should be looking at something like this:
Compressors usually come with one of a number of "standard" connections. Converters between these various standards are readily available. So in the end what counts is what sort of connector you decide you want on the end of your air hose. PCL connectors are a popular choice, and these make for easy coupling and decoupling of tools, while keeping the air trapped in the hose when there is no tool fitted.
Volume helps speed the tyre inflation possess, you don't *need* it.
The connections are a standard type, but not PCL. I changed over to PCL years ago so just swapped them out (two minute job). Machine Mart have all the PCL stuff for a quid or two. The attachments are pretty cheap, the paint sprayer won't be up to much, and you'll want some decent rubber hose.
It's a cracking compressor. I've got three and join them together with some 'Y' pieces for when I'm doing stuff that requires a lot of air. (industrial needle de-scaler or grit blaster)
Julian.
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