What will happen:
2076, Mazda releases the brand new, 8 rotor, RX-27, and it becomes an instint hit, everyone has one, and the sound of many people revving at 13K RPM causes Earth inequality, sending earth off of it's axis. time changes, but nothing else.
2099, Several people with now century year old RX-7 Spirit Rs come out for a race.
2186, Mazda's new LeMans winner, the 6391R, is made into a street car. A new race track is made, it's just a strait line with 200 lanes. 200 6391R owners show up for 6391-Stock(like 7-Stock from 184 years ago), and they hold a drag race on this new track. The 79875HP cars all rev up, causing the earth to again change it's path in space. The lights turn green, the ensueing gear ingaging results in the earth spinning 70 times as fast as the normal day, causing the earth's crust to expand, crack, and depart earth, everyone instintly becomes frozen in space...but I am able to hold onto the Mazda North American Opperations building, and everyone in the building survives with me, and we go on to build a rotary powered space shuttle, and we fly to Mars and meet up with these nice ladies, and live happily ever after...
huh...