Cars are often tuned in a special way for best effect in multiplayer races. You do this by tuning for best possible speed at the lowest possible rank. What this does is effect how the matchmaker finds a race for your car.
While having only top speed stats upgraded (Upgrades 0/5/0/0, Pro Kits 5/0/5/0) with a Tuning Kit, the Chevrolet 2016 Camaro SS can hit a top speed of a whopping 491 km/h at a rank as low as 1450 -- beating cars at rank 1600 and higher! That is the equivalent of a MAX+PRO McLaren P1 GTR. You can find more info on the Multiplayer Math page.