You will find these evil later in the game, because no matter what you have, and what you're chasing, the AI goes at the same speed as you. And although its funny watching an SUV hurtle around a hairpin at 100mph, it takes a long time, my advice is get a slower car, like the Mini Compact or the British Convertable, and although they're still as quick as you, it gives you more time to time your airjack and you don't have to worry about crashing too much. Also, after you drop off your first car, just jump into the parked cars provided, don't bother airjacking a faster vehicle as it just wastes time.