Bottom line, if the club sells products that turn out to be dodgy then it could be liable.
If this is a risk you want to avoid, one idea would be to incorporate a private limited compay to act as the selling vehicle for the goods, with all of the shares held by the club. e.g. 'Renault Turbo Owner's Club Sales Limited'
If there was a problem and an individual sued the seller, Renault Turbo Owner's Club Sales Limited, the club's liability would be limited to the value of its shares in this company. Note that the directors of the company could potentially face personal liability in limited circumstances, which would have to be born in mind by those who accepted this role.
It would cost about £100 in fees to set up the company. Annual returns would have to be filed, and basic annual meetings held, so there would be a small ongoing cost. If it was selling stuff above a certain value it would have to be VAT registered etc. No rocket science though.