* Modifications: Any modifications to the engine, turbo, exhaust, or other performance aspects will significantly affect top speed. Stock cars rarely achieve their theoretical top speed.
* Driver skill and conditions: A skilled driver in ideal conditions (e.g., long, flat, straight road with no wind) will achieve a higher top speed than an inexperienced driver or someone driving in less-than-ideal conditions.
* Gear ratios: Final drive gear ratio will influence top speed at a given engine RPM.
* Aerodynamics: Even minor aerodynamic differences (like a slightly different spoiler) can affect top speed.
While a *stock* 1990 Eagle Talon TSi might *theoretically* reach speeds in the high 120 mph range, it's unlikely to reach that without significant modifications and perfect conditions. Most owners report real-world top speeds closer to 110-120 mph, but again, this can vary considerably.
