and two Defiants, which are famed for their exceptional slowness and propulsive problems.
I don't remember it ever being stated on screen that the Defiant was slow. The propulsion problems had nothing to do with speed, but with the engines being way to powerfull for the spaceframe.
Think of it as shoving a LS6 V8, twincharged and producing close to a 1000bhp...... in a standard Volkswagen Beetle. The older type. The amount of torque from that engine would twist the chassis of that poor little Volkswagen.