Several websites offer specifications for the latest and even older models of automobiles, including the Edmunds, Car and Driver, Motor Trend and Autobytel websites. In addition, every manufacturer has the specifications for certain models listed at their websites.
Some of the most detailed specifications for autos are at the manufacturers' sites, Autobytel and Edmunds.com. One advantage of the last two over manufacturers' sites is that they don't include as much trademark jargon.
For people who want just a quick run-down of specs, the automobile magazine websites, including Car and Driver and Motor Trend, give fewer details than the manufacturers, Edmunds or Autobytel.
Car dealerships also provide brochures that give specifications on various models of automobiles.