That car^^ is not drivable or practical in everyday street…lol That car was a full on drag car with expensive customizations that is illegal to drive on public roads. As far as big bucks to beat one, not really. The 2003 Mustang Cobras are LEGENDARY. Guys are getting 03 Cobras to run 9 secs in the quarter mile STREET LEGAL, so you figure 2 seconds away from a highly customized (I would submit exotic) rotatory car that needs to be trailered to the the track is not bad at all.
Secondly, a practical rotor motor (say an RX7 engine) is known to have a poor bottom end performance, meaning, short quick races in the street your going to get beat by cars with average torque and clobbered by high torque motors say like a Corvette or a 1987 Grand National. Rotors only really come alive during long distance races like long open straights or on the highway unless you dump a ton of money into the engine/trans.
I know because I raced one, I was on the freeway and I was in my 5.0 Mustang and I was racing another 5.0 Mustang and a Mazda RX7. Me and the other guy in his Mustang left the RX7 as we all got on the freeway at the same time, but the Rx7 came on strong from nowhere as we got up to 80mph and stayed with us. I could not shake the RX7 but the other faster Mustang eventually left both of us. The other Mustang must have had a full exhaust system and better cylinder heads.