Distinctive sound, irrepressible power and astonishing performance, the RS 660’s froward-facing
parallel twin-cylinder inherits many concepts and measurements from the front bank of the Aprilia V4 1100, but above
all, it inherits the character: including the same tone of exhaust sound and the typical punch of V powerplants.
100 HP, a thrilling peak speed and hefty torque, most of which is already available at low revs. A mechanical heart
with exceptional harmony and the performance of a much larger displacement twin-cylinder, albeit compact and lightweight
enough to let the Aprilia engineers wrap you around an agile and effective chassis architecture, whether you’re riding on
the road or on the track.