* Engine Option: The 1968 DeVille offered several engine choices (typically a 472 cubic inch V8, but possibly others depending on the trim level and options). Larger engines and higher horsepower resulted in quicker acceleration.
* Transmission: Automatic transmissions were standard, but the gear ratios and overall efficiency varied slightly.
* Vehicle Condition: The car's condition, tire pressure, and overall maintenance significantly impact performance. A well-maintained car will be considerably faster than one in poor condition.
* Weight: A convertible, even with the top up, generally weighs slightly more than a coupe, affecting acceleration.
* Testing Methodology: Different testing methods and equipment can yield slightly different results.
While you won't find an official factory figure, expect a 0-60 mph time in the high 10 to low 12 second range for a reasonably well-maintained example. This is just an estimate, and individual cars could be faster or slower.
