I'll never forget the sound of the Mazda quad rotor WSPC (world sports prototype car?) going around Spa Francorchamps in Belgium back in 1989 (or was it 1990?) Coming out of the corners it sounded like a Cosworth V8 at full revs and then it would rev from there upwards. I know we're talking about models here but have a look at these two. Although it's from the world of dragracing which not everyone likes, they are however impressive projects.
(A) Quad rotor, huge single turbo, making around 1600 hp. Best ET (dragracing) 7.29 seconds at 191.9 mph
http://www.queenstsmash.com.au/v3/pages/racing_qsr1.php
(B) or this single 20B running 7.04 seconds at 199 mph
http://www.pacperformance.com.au/con.../Team/mx6.aspx
Phil