what year is the prelude? it should come down to driver at first but once you get around 80-90 you should walk away from him. maybe even sooner, the 2000 prelude runs 6.8 and 15.4, as far as a 350, you better hope they don't know how to drive, otherwise all you'll be seeing is his back side. and the jetta, you should walk on. but last time i checked. the prelude and jetta look like crap compared to a crossfire, and for the price of the 350z and the difference in power it has it better be faster. even if the 350 doesn't launch the car, it would probably win... just my opinion. But any crossfire that beats a 350, beat the driver. as far as the highway story. idk, maybe they didn't down shift completely? or maybe they didn't punch it the same time as you? or you were already accelerating from behind them gaining momentum while they were cruising at a set speed?