While exact figures are hard to pin down without specifics on the car's condition and modifications, a general range would be:
* Base models: Likely topped out around 90-100 mph.
* High-performance models (R/T, etc.): Could potentially reach speeds in the 120-130 mph range, though this would depend on factors like gearing, tire condition, and road conditions. The legendary 426 Hemi versions could arguably exceed this.
Keep in mind that these are estimates. Factory-quoted speeds were often optimistic and actual real-world performance varied.