He said: "Some insurers do provide up to 90 days free comprehensive cover for your vehicle anywhere in Europe and some other non-EC countries like Switzerland.
"But others don't automatically provide it for free, and they might charge a little more."
By not being covered comprehensively for driving abroad, drivers could have problems if they need to get their car removed from a foreign country, he concluded.
According to the RAC Foundation, around three million British drivers head into mainland Europe by ferry or the channel tunnel every year.
The body has also stated that UK motorists driving in Spain and Portugal are three times more likely to have an accident than they are at home.
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