Without knowing the specific engine, it's impossible to give a precise top speed. However, you can expect the range to be:
* Base models (e.g., 2.7L V6): Likely around 110-120 mph (177-193 km/h), possibly lower depending on conditions and modifications.
* Higher-performance models (e.g., 5.7L Hemi V8 R/T, 6.1L Hemi V8 SRT8): Could reach 140-150 mph (225-241 km/h) or more, again, depending on conditions and modifications. Keep in mind that exceeding the manufacturer's recommended speed is dangerous.
To find the exact top speed for *your* specific 2006 Dodge Charger, you'd need to check the vehicle's documentation or consult a Dodge Charger owner's manual for that year and trim level.