Bro,
No offense but if you have to go online and ask a bunch of strangers if you can afford a sports car then chances are your finances aren't as well managed as it should be or you're probably not approaching it correctly.
I believe in looking at your income after epf and socso deductions as well as taking into account income tax after which you minus a reasonable % for savings and investments, minus your mortgage payments, bills, life and medical insurance, home contents insurance, monthly contributions for your parents etc (this is part A of your expenses) and then you're left with a certain amount of cash which is truly yours to do as you see fit.
That amount is basically all for your enjoyment (part B of your expenses), correct? So look at your lifestyle and consider the amount of times you eat out, the shopping for new clothes, coffee at Old Town, clubbing at Zouk, handbag for your missus and the occasional movie.
After all is accounted for, if there is a positive balance then that could be allocated towards a Skyline. Now is the time you have to be realistic and ask yourself, will that amount cover the monthly installments for a Skyline as well as maintenance, running costs (fuel, toll and parking to begin with) not to mention repairs and future modifications.
If the amount is not enough to cover the Skyline then you must forgo the enjoyment - shopping, clubbing, etc (part B of your expenses) but NEVER at the expense of part A of your expenses.
That's how I would approach it and so far, it seems to be working well as prudent/conservative/boring as fk approach it may be, it'll keep your ass out of trouble.