@tahasoomro You don't just have to pay the 60% of the MSRP of car upfront when you finance it. You have to pay the first year's insurance, processing fee, freight, registration etc and this adds up to a hefty sum too and if you are paying close to 75% (ballpark figure, not calculated) in advance, I would rather suggest you wait.
1- Maybe try managing another form of loan within your family or close circle where you don't have to pay interest.
2- If at all, someone who is wanting out of a financed deal from an Islamic bank is another good option for you. There will be people selling their financed corollas in maybe 6 months time and they sell it at a loss in almost all cases. Someone's loss can be your gain.