Wankels are heavy expensive pieces of junk. Apex seals don't like detonation when compared to traditional piston type engines. Also don't be fooled by the 1.3 designation look at the combustion cycle.
Hitler actually explains it best
http://www.youtube.com/watch?v=zxsY4...layer_embedded http://www.motoiq.com/magazine_artic...-love-16x.aspx Both of my TIs will absolutely destroy a Mazadaspeed 3 at the at the track (drag autocross you name it).