Managed to crack a whopping 79mph in my Subaru 360 on SSRX until I was hit by a angry yob in a souped up Midget doing 81mph. I think he should of had his licesence taken away for going 81mph in a 80mph lobby and for ramming a harmless Subaru 360.
On a serious note, 225 mph in my Honda beat. Its hard being serious My actual best is 337mph in a pagini huyara.
I go to arcade mode, single race, original courses, special stage route x, professional level. Under the transmission part for car settings, i just tune the max speed to 311 MPH but under the draft, can get to a max of 333 MPH.