A Tesla Roadster is capable of 300 mph.

No, is the immediate response. The max speed of the Tesla Roadster is about 250 miles per hour.

Due to safety and engineering limitations, the car cannot move any faster.

The Tesla Roadster's 200kWh battery pack, two electric motors, and

 four-wheel independent suspension are designed for good road handling rather than rapid acceleration.

Although there are other cars with top speeds of over 300 mph on the market, they lack the Tesla Roadster's superior performance, utility, and longer range.

The top speed of a Tesla Roadster is still significantly faster than the majority of speed limits, 

giving thrill-seekers adequate power without exceeding the limits of the vehicle's design.