Fernando Torres' power header got the ball rolling for Rafael Benitez's men inside three minutes, his seventh goal in the last six games, before a stunning free-kick by David Luiz and a Branislav Ivanovic header had the points in the bag by the break.
Villa goalkeeper Brad Guzan did his best to limit the damage with a string of fine saves in the second half, but he could not keep out Frank Lampard's fizzing long-range effort and then suffered the ignominy of Ramires slotting a fifth between his legs.
Oscar made it six from the spot in the 79th minute and there was still time for Eden Hazard to become the seventh different goalscorer when he lashed home, while Ramires made it eight at the death as Paul Lambert's men were brought back to earth with a bump following last week's impressive win at Liverpool.
It might have been even worse for Villa after Lucas Piazon won a penalty after a foul by Clark, but the debutant could not add to Villa's misery as Guzan guessed right to make a good save.
After Benitez's reign began in low-key fashion with goalless stalemates against Manchester City and Fulham, the European champions have since averaged more than three goals a game after netting 26 times in seven matches in all competitions.
Chelsea's performance also marked the first time seven different players had scored for the same team in a single Premier League match.
For Villa the threat of Christian Benteke was much discussed ahead of the match after his two goals and superb assist for Andreas Weimann in the win over Liverpool, but the Belgium international could do nothing to stop Chelsea running riot.