Pressure washers petrol vs electric?
Petrol pressure washes are more powerful than the electric and you are not restricted by the length of your extension cord however petrol pressure washers are more noisy but are more often used as professional machines.
Are petrol pressure washers any good?
A petrol motor is more powerful than an electric motor in a pressure cleaner, so the petrol pressure washer can produce a higher psi than the electric making the petrol pressure cleaner better at cleaning up hard to shift stains and dirt like grease and oil, also you're more than likely to have petrol around if you have other machines lawnmowers or edges.