No Turbo-Compounding...Like they did the the 3 tailed Connie’s and the B-29’s if I am not mistaken. Google it! It is a forgotten technology that Detroit Diesel ( and others ) have revisited with their trucks for better fuel economy!
Wankel’s biggest problem is emissions.
That long thin combustion chamber has a very high surface-to-volume ratio which is just the opposite of what you want.