Singapore is the most expensive city to hire a car. In fact, the daily rate for car hire in Singapore is over eight times more expensive than that in Madrid, at $115. Although, given that Singapore is a small island, you can probably get around without hiring a car.
The cheapest destination for car hire was the Spanish capital of Madrid, where the average daily rate was just $14. Madrid is known for its beautiful boulevards, parks and galleries, all of which can be explored on foot or by using the city’s Metro system.
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https://www.theautochannel.com/news/2022/02/23/1109911-new-study-reveals-cheapest-countries-to-hire-car-after-prices.html