As part of our in-depth testing regimen, we ran the RS 660 on our in-house Dynojet 250i dyno, recording horsepower and torque measurements. The Aprilia produced an impressive 88.81 peak horsepower at 10,450 rpm and 45.34 pound-feet of torque at 8,530 rpm. Also take note of the flat, broad torque curve, resulting in drivability at nearly any rpm. From 8,000 to 10,000 rpm, torque varies very little, while nearly 80 percent of its peak torque is available from 4,000 rpm. It’s more of a tabletop than a curve. Impressive.