BHP is more important that torque for top speed.
If you make lots of torque without lots of bhp it means you do it at very low rpm, which means that by the time you have put it hrough a gearbox you have LESS torque at the wheels than a car with more hp and less torque
Its TORQUE @ WHEELS that moves a car forwards, and thats a function of BHP and Gearing only and not of the engine torque figure (unless in context with RPM at which points thats what a BHP figure is!)