The maximum speed a car can reach while accelerating forward depends on several factors, including the power and torque of the car's engine, the weight of the car, and the aerodynamics of the vehicle.
In general, production cars have speed limits imposed either by the car's design or by legal regulations. On public roads, the speed limit is set by local laws and regulations. However, on a racetrack or other controlled environments, some high-performance cars can achieve very high speeds during acceleration.
It's worth noting that the acceleration of a car usually decreases as it approaches its top speed. This is because as the speed increases, the air resistance (drag) also increases, requiring more power to overcome it and continue accelerating.
It's important to always adhere to local speed limits and drive safely and responsibly.