Here is a nice little EV speed calculator…
Tyre Types should be entered using their standard notation (For example: “P175/35 R14”), or you can enter the numbers manually. Gear and Differential ratios are entered in standard x:y ratio format.
All estimates here are absolute perfect-world best-case scenarios. You WILL NOT get these performance figures, this is merely a (very optimistic and simplistic) estimate. 0-100KMH is 0-62MPH, give or take a few thousands.
If you have any problems with it, drop me a line in the comments, and let me know what browser you’re using.