Quite a close match for all cars involved, yes, including you joey824. Now: for the results you've been waiting for...:

Tests: Detail, Speed, HP/W Ratio, Handling, and Time around Gold Prix.

Detail (5 points added for if you included an interior):
marcox43: 9.5/15
the0liveira: 6.5/10
joey824: 4/10 (don't fret, I know you're a newbie)
Rhombus: 6/15

Speed:
marcox43: 263 MPH
the0liveira: 283 (+) MPH
joey824: 195 MPH
Rhombus: 291 (+) MPH

Handling:
marcox43: 7/10
the0liveira: 8/10
joey824: 5/10
Rhombus: 5/10

HP/W Ratio:
marcox43: 9.12 (5,471÷600)
the0liveira: 92.28 (18,456÷200)
joey824: 7.84 (3,918÷500)
Rhombus: 9.18 (4,591÷500)

Times (3 laps each- using best times):
marcox43: 53.7
the0liveira: 51.3
joey824: 59.2
Rhombus: 57.2

So in scoring:
marcox43: 24.5 points!
the0liveira: 25.5 points!
joey824: 12 points!
Rhombus: 19 points!

Congrats to our winner, the0liveira, winning by 1 point!

Thank you all for participating, and great builds all around- I do hope this hasn't caused any controversy, but I did score to the best of my abilities. Again, thank you for participating, and I hope more challenges will be even more successful in the future!