Aprilia RS 660 Trofeo: Built completely by the brand’s racing department, the Aprilia RS 660 Trofeo or Trophy slots right below the meanest Aprilia RSV4 XTrenta. The Trofeo is equally track-oriented and is powered by the brand’s 660cc twin-cylinder unit. However, the mill has been heavily tweaked by the folks at Aprilia Racing Team to increase the power output to 105bhp. Moreover, the dry weight of this iteration of the RS bike has also dropped to 153 kg., Bike News News, Times Now