Point of top speed testing is to see what the car can do naturally, this includes the air resistance which slows down a car dramatically. So sorry if I don't care if someone gets their Veyron to 287, or something. Not impressive drafting. But for myself, I haven't even tested the Veyron yet. Don't even care at this point. I only top speed test fully tuned cars, so it takes a while. Hence why the Veyron will sit for a long time, no interest in wasting money on that boring car without an interior view. But yea, so far the fastest for me are these two:
1. 242 MPH - Chevorlet Corvette ZR1 (905 HP)
2. 240 MPH - Lamborghini Murcielago LP-640 Chrome Edition (871 HP)
And the slowest car I've tested so far is my favorite car to actually race:
190 MPH - Autobacs Arta Garaiya (503 HP)