Algodoo

Arrow keys to drive Ronanh`s "fastest car in Phun".
The Amazing Brick of Speedy Fastness drives itself. Slightly smaller wheelbase but somewhat longer total length. Size doesn`t make much difference, though.

Try as you might, you won`t be able to hold a candle to the Brick. Even if you set its wheels back to 2.000 friction like the "fastest car", the Brick still wins.
I set it up pretty arbitrarily to accelerate twice as fast as the "fastest car". I could have just as easily made it three times as fast, but ten times may have required some reworking of the body, which I put very little thought into.